user instructions - flowserve · 2020-01-02 · if damaged, immediately report the damage to the...
TRANSCRIPT
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Experience In Motion
USER INSTRUCTIONS
InstallationOperation
Maintenance
Limitorque ® L120-190 through L120-2000FCD LMENIM1203-01-AQ – 05/15
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
flowserve.com
Contents1 Introduction 5
1.1 Purpose 51.2 User Safety 5
2 Initial Inspection and Storage Instructions 62.1 Product Identification 72.2 Inspection and Recording 82.3 Short-Term Storage (less than 1 year) 8
3 Actuator Weights 104 Installation Instructions 11
4.1 Safety Precautions 114.2 Safety Practices 124.3 Actuator Preparation 12
4.3.1 Mounting Base 134.3.2 Stem Acceptance 13
4.4 Double Torque Switch 134.4.1 Setting Torque Switch 144.4.2 Balancing Torque Switch 154.4.3 Torque Switch Terminal Connections 15
4.5 Geared Limit Switch – Rotor Type 164.5.1 Setting Limit Switch 164.5.2 Combination of Contacts 19
4.6 Position Indication 194.6.1 Local Position Indication 194.6.2 Remote Position Indication 204.6.3 Calibrating Position Transmitter PT20SD 20
5 Operation 215.1 Electrical Start-Up 21 5.1.1 Typical Wiring Diagram 225.2 Manual Operation 225.3 Motor Operation 235.4 Torque and Travel Limiting 23
6 Maintenance 246.1 Lubrication 24
6.1.1 Lubrication Inspection 246.1.2 Factory Lubricant 25
7 Disassembly and Reassembly 267.1 L120-190, -420, and -800 26
7.1.1 To Replace Stem Nut Only 267.1.2 L120-190, 420, 800 Disassembly 277.1.3 Reassembling Actuator Sizes L120-190, -420 and -800 287.1.4 Gaskets 29
7.2 L120-2000 387.2.1 Drive 2 Disassembly (Thrust Housing Only) 387.2.2 Drive 1 Disassembly (Torque Housing) 387.2.3 Drive 1 (Torque Housing) Reassembly 407.2.4 Drive 2 (Thrust Housing Only) Reassembly 42
8 Standard Wiring Diagrams 499 Troubleshooting 52
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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10 How to Order Parts 5311 EC Declaration of Conformity 54
FiguresFigure 2.1 – L120-190 through 2000 8Figure 4.1 – Double Torque Switch 13Figure 4.2 – Setting Torque Switch 14Figure 4.3 – Ring Tongue Terminal 15Figure 4.4 – Geared Limit Switch 17Figure 4.5 – Setting Geared Limit Switch 18Figure 4.6 – Position Indicators 19Figure 4.7 – Typical Connection for a 1000 ohm Potentiometer 20Figure 7.1 – L120-190 and -420 Drive Sleeve Side View (Refer to Table 8.1 for parts list) 30Figure 7.2 – L120-190 and -420 Worm Shaft Side View (Refer to Table 8.1 for parts list) 31Figure 7.3 – L120-190 and -420 Top View (Refer to Table 8.1 for parts list) 32Figure 7.4 – L120-800 Drive Sleeve Side View (Refer to Table 8.1 for parts list) 33Figure 7.5 – L120-800 Worm Shaft Side View (Refer to Table 8.1 for parts list) 34Figure 7.6 – L120-800 Top View (Refer to Table 8.1 for parts list) 35Figure 7.7 – L120-2000 Drive Sleeve Side View (Torque Base) (Refer to Table 8.2 for parts list) 43Figure 7.8 – L120-2000 Top View (Refer to Table 8.2 for parts list) 44Figure 7.9 – L120-2000 Side View (Refer to Table 8.2 for parts list) 45Figure 7.10 – L120-2000 Exploded View 46Figure 8.1 – Wiring Diagram – No Controls 49Figure 8.2 – Wiring Diagram – Integral Controls 50Figure 8.3 – Wiring Diagram – NCU 51
TablesTable 3.1 – Actuator Weights 10Table 4.1 – Mounting Base Dimensions 13Table 4.2 – Maximum Stem Acceptance 13Table 4.3 – Terminal Dimensions By Cable Size 16Table 4.4 – Maximum Drive Sleeve Turns 17Table 6.1 – Lubricant Weights 25Table 7.1 – L120-190, -420 and -800 typical parts list 36Table 7.2 – L120-2000 typical parts list 47
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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1.1 Purpose This Installation, Operation, and Maintenance Manual explains how to install and maintain L120-190 through -2000 actuators. Information on installation, disassembly, reassembly, lubrication, and parts is provided.
1.2 User Safety Safety notices in this manual detail precautions the user must take to reduce the risk of personal injury and damage to the equipment. The user must read and be familiar with these instructions before attempting installation, operation, or maintenance. Work to be performed on the actuator should be carried out by a qualified tradesman familiar with the operation and maintenance of electric actuators. Failure to observe these precautions could result in serious bodily injury or death, damage to the equipment, warranty void, or operational difficulty.
Safety notices are presented in this manual in three forms:
c WARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning notices could result in personal injury or death.
a CAUTION: Directs the user’s attention to general precautions that, if not followed, could result in personal injury and/or equipment damage.
NOTE: Highlights information critical to the user’s understanding of the actuator’s installation and operation.
1 Introduction
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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L120 Series actuators operate without modification in any rising or non-rising stem application for linear-action valves.
The actuators meet rigid safety requirements and are available in weatherproof, explosionproof, and submersible configurations.
The actuators are compatible with a wide range of control options from stand-alone actuators with local control stations to open standards-based DDC-100 networks with up to 250 actuators.
The actuators are designed with integral control packages including plug-in interconnect boards that increase control functionality for stand-alone or networked actuators.
Torque overload protection is provided in both directions of travel.
2 Initial Inspection and Storage Instructions
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c WARNING: Read this Installation and Maintenance Manual carefully and completely before attempting to store the actuator. Be aware of the electrical hazards.
2.1 Product IdentificationThe actuator nameplate is located on the back of the actuator opposite the limit switch controls compartment. The nameplate contains the following information:
• Limitorque name
• Point of manufacture
• Actuator size
The motor nameplate is located on the motor. The nameplate contains the following information:
• ID number
• Run torque
• RPM
• Full load amps
• Insulation class
• Space heater size
• Service Factor
• Cycles
• Ambient temperature
• Start torque
• Order number
• Serial number
• Customer tagging
• Enclosure type
• Volts
• Locked rotor amps
• Duty
• Horsepower
• Phase
• Motor code
• Connection diagram
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Figure 2.1 – L120-190 through 2000
2.2 Inspection and RecordingUpon receipt of the actuator, inspect the condition of the equipment and record nameplate information.
1. Carefully remove actuator from shipping carton or skid. Thoroughly examine the equipment for any physical damage that may have occurred during shipment. If damaged, immediately report the damage to the transport company.
2. Record the actuator nameplate information for future reference, i.e., ordering parts, obtaining further information.
NOTE: The following are our recommended storage procedures to retain maximum product integrity during short-term storage. Failure to comply with recommended procedures will void the warranty. For longer-term storage, contact Limitorque for procedures and recommendations.
2.3 Short-Term Storage (less than 1 year)Actuators are not weatherproof until properly installed on the valve or prepared for storage.
Store actuators in a clean, dry, protected warehouse away from excessive vibration and rapid tempera-ture changes. If the actuators must be stored outside, they must be stored off the ground, high enough to prevent them from being immersed in water or buried by snow.
Motor
Limit Switchand ControlsCompartment
Housing
DeclutchLever
Handwheel
Actuator Nameplate(hidden)
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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1. Position the actuator in storage with motor and switch compartment horizontal.
2. Connect the space heaters (if supplied) or place desiccant in the switch compartment.
3. Connect space heaters if actuator is to be stored in a damp place.
4. Replace all plastic caps or plugs with pipe plugs and ensure that all covers are tight.
5. If the actuator is mounted on a valve and the stem protrudes from the actuator, a suitable stem cover must be provided.
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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The approximate L120 actuator weights are provided below:
Table 3.1 – Actuator Weights
Actuator Size Control TypesDrive 1 Weight Side HW Drive 2 Weight Side HW
lb. kg lb. kg
L120-190NCU3 520 192 520 192BIC3 586 217 586 217
UEC/Clamshell3 586 217 586 217
L120-420NCU3 1065 394 1065 394BIC3 1130 418 1130 418
UEC/Clamshell3 1220 451 1220 451L120-800 NCU3 12701 4711 17002 6292
L120-2000 NCU3 25001 9251 33002 12212
Note 1: Torque Only Note 2: Torque and Thrust Note 3: NCU = No Controls Actuator BIC = Basic Integral Controls UEC = Universal Electronic Controller
3 Actuator Weights
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4.1 Safety Precautions c WARNING: Read this Installation, Operation, and Maintenance Manual carefully and completely
before attempting to install, operate, or troubleshoot the Limitorque actuator.
c WARNING: Be aware of electrical hazards. Turn off incoming power before working on the actuator and before opening the switch compartment.
c WARNING: Potential HIGH PRESSURE vessel — be aware of high-pressure hazards associated with the attached valve or other actuated device when installing or performing maintenance on the actuator. Do not remove the actuator mounting bolts from the valve or actuated device unless the valve or device stem is secured to prevent movement of the stem or there is no pressure in the line.
c WARNING: For maintenance and/or disassembly of the actuator while installed on the valve, ensure that the actuator is not under thrust or torque load. If the valve must be left in service, the valve stem must be locked in such a way as to prevent any movement of the valve stem.
c WARNING: Do not attempt to remove the spring cartridge cap, housing cover, or stem nut locknut from the actuator while the valve or actuated device is under load.
c WARNING: Do not manually operate the actuator with devices other than the installed hand-wheel and declutch lever. Using force beyond the ratings of the actuator and/or using additive force devices such as cheater bars, wheel wrenches, pipe wrenches, or other devices on the actuator handwheel or declutch lever may cause serious personal injury and/or damage to the actuator and valve.
c WARNING: Do not exceed any design limitations or make modifications to this equipment without first consulting Limitorque.
4 Installation Instructions
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c WARNING: Actuators equipped with electrical devices (motors, controls) requiring field wiring must be wired and checked for proper operation by a qualified tradesman.
c WARNING: Use of the product must be suspended any time it fails to operate properly.
a CAUTION: Do not use oversized motor overload heaters. Instead, look for the cause of the overload.
a CAUTION: Do not operate the valve under motor operation without first setting or checking the limit switch setting and motor direction.
a CAUTION: Do not force the declutch lever into the motor operation position. The lever returns to this position automatically when the motor is energized.
a CAUTION: Do not depress the declutch lever during motor operation to stop valve travel.
a CAUTION: Do not use replacement parts that are not genuine Flowserve Limitorque parts, as serious personal injury and/or damage to the actuator and valve may result.
a CAUTION: Do not lift actuator/gearbox or actuator/valve combinations with only the eye bolts in the L120 actuator. These eye bolts are designed for lifting the L120 actuator only.
a CAUTION: Do not lift the actuator by handwheel.
4.2 Safety PracticesThe following check points should be performed to maintain safe operation of the L120 actuator:• Eye bolts are designed for lifting only the actuator and not associated gearboxes or valves.
• Mount motor on a horizontal plane, if possible. Preferably, keep the motor or limit switch compart-ment from hanging down. This prevents head of grease from being against motor or switch seals.
• Keep the switch compartment clean and dry.
• Keep the valve stem clean and lubricated.
• Set up periodic operating schedules for infrequently used valves.
• Verify that all actuator wiring is in accordance with the applicable wiring diagram.
• Carefully check for correct motor rotation direction. If the motor is driving the valve in the wrong direction, interchange any two leads on the three-phase motor or switch the armature leads on DC motors.
• Use a protective stem cover. Check valve stem travel and clearance before mounting covers on rising stem valves.
• Verify that a locking nut tightly secures the stem nut and that the top thread of the lock nut is crimped and staked in two places.
• For the DC motor, keep the armature clean and periodically check brushes for proper contact and wear.
4.3 Actuator PreparationNOTE: Replace all molded plastic conduit and top protectors (installed for shipping purposes only) with pipe plugs when installation wiring is complete.
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4.3.1 Mounting BaseThe mounting hole sizes and quantities are as detailed in Table 4.1, below:
Table 4.1 – Mounting Base Dimensions
Actuator SizeMounting Holes Tap Size
ISOBolt Circle
ISOQuantity MSS MSS
L120-190 8 3/4–10 x 1.13 M20 x 2.5 x 32 11.75 298 mmL120-420 8 7⁄8–9 x 1.75 N/A 14.0 N/A
L120-800 (Torque Only) 8 3/4–10 x 1.63 N/A 17.0 N/A
L120-800 (Thrust Only) 8 1.25–7 x 2.0 N/A 16 N/A
L120-2000 (Torque Only) 16 1–8 x 2.0 N/A 23.5 N/A
L120-2000 (Thrust Only) 12 1-1/2–6 x 3.0 N/A 18.0 N/A
4.3.2 Stem AcceptanceThe maximum stem acceptance is provided in Table 4.2, below:
Table 4.2 – Maximum Stem Acceptance
Actuator sizeDrive 2 Tapped Drive 1 Bore Drive 1 Key
inch mm inch mm inch mm
L120-190 3.5 89 2.875 73 3/4 x 1/4 20 x 12
L120-420 5 127 4.25 108 1 x 3/4 28 x 16
L120-800 5 127 7 178 1 x 3/4 32 x 18
L120-2000 6.25 159 8.00 203 11/4 x 7⁄8 40 x 22
NOTE: For complete mounting dimensions, see sales brochure LMENBR1200.
4.4 Double Torque SwitchThe torque switch is designed to protect the actuator in open and close directions.
Figure 4.1 – Double Torque Switch
NOTE: See Caution and Note on following page.
OPEN
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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a CAUTION: Disconnect all incoming power before opening limit switch compartment or working on the torque switch.
• Do not use abrasive cloth to clean the contacts on the torque switch.
• Do not torque-seat 90° operation valves or run them against the stops. This may cause damage to the valve.
NOTE: If the actuator has “torqued out,” release torque buildup by operating the actuator manually in opposite direction 1/2 to 1 turn of the output drive sleeve.
NOTE: Torque switch contacts are rated 600 volts, in accordance with NEMA ICS-2.
4.4.1 Setting Torque SwitchThe torque switch was set at the factory according to customer-supplied information regarding neces-sary torque or thrust output provided at the time of the order. However, if the torque switch is newly installed or the setting needs to be adjusted, follow the procedure below:
a CAUTION: A maximum stop setting plate is provided on most actuators (Figure 4.2). Do not remove this plate. Do not exceed the setting indicated by this plate without contacting Limitorque.
• Installing or adjusting the torque switch with the operator in a “loaded” condition will result in a loss of torque protection.
Item letters correspond to Figure 4.2.
1. Place the L120 actuator in manual mode.
2. Release the load on the wormshaft spring pack. Put operator in manual mode and operate in opposite direction until switch is in neutral position.
3. For open and close directions, loosen Screw (A) and move Pointer (B) to desired position. A higher number indicates a high torque and/or thrust output.
4. Tighten Screw (A).
5. Operate the valve electrically to seat the valve and to ensure tight shutoff.
Figure 4.2 – Setting Torque Switch Maximum StopSetting Plate
Torque Switch Dial
A
B
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4.4.2 Balancing Torque SwitchItem letters correspond to Figure 4.2.
1. Place the actuator in manual mode.
2. Remove the load from the wormshaft spring pack.
NOTE: If the actuator torque switch has opened and de-energized the actuator, release the torque buildup by operating the actuator manually in opposite direction 1/2 to 1 turn.
3. Note the open and close torque switch settings prior to re-installing the torque switch.
4. Loosen Screws (A) and position both Pointers (B) at the #1 setting; tighten Screws (A).
5. Mount the torque switch and tighten the mounting screws. Verify that both contact pointers are touching the arms. The interface between the pointers and the arm is found beneath the torque switch dial. If the pointers and the arms are not in contact, the clearance on the open and close torque switches should be equal. If not equal, the torque switch needs to be balanced. (See Step 7.)
6. If the pointers and arms are in contact on both sides of the switch, manually rotate the torque switch dial clockwise and counter-clockwise to determine if there is equal backlash in both direc-tions of rotation. If there is not equal backlash in both directions, the torque switch needs to be balanced. (See Step 7.)
7. Loosen both hex nuts.
8. Back out one setscrew and tighten the other setscrew until there is equal backlash in both directions of rotation of the dial, or equal clearance between the pointers and arms.
9. Tighten the hex nuts and return the torque switch to its original settings.
a CAUTION: The balancing screws should not be touched except during the balancing procedure.
The switch is now balanced and ready for the pointers to be returned to their original settings.
4.4.3 Torque Switch Terminal ConnectionsWiring connections to the L120 geared limit switch, torque switch, and marathon terminal strips are to be made using ring-tongue terminals as shown below:
Figure 4.3 – Ring Tongue Terminal
See Table 4.3, next page
AC
B
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Table 4.3 – Terminal Dimensions By Cable Size
AWG Screw Hole Insulation Thomas & Betts P/N A B C
22-16 #10 Vinyl 18RA-10 .97 .31 .27
18-14 #10 Vinyl 14RB-10 .97 .31 .27
12-10 #10 Vinyl 14RC-10 1.06 .31 .27
Terminals are to be crimped using Thomas & Betts crimping tool WT111M.
4.5 Geared Limit Switch – Rotor Type a CAUTION: The geared limit switch is not preset at the factory and must be adjusted after the
actuator has been mounted on associated equipment.
NOTE: Limit switch contacts are rated 600 volts, in accordance with NEMA ICS-2
• Disconnect all incoming power to the actuator prior to opening the limit switch compartment and adjusting the switch.
• Consult the relevant wiring diagram for limit switch contact development. All L120 actuators are supplied with 16-contact limit switches - four switches on each of the four rotors. Two rotors are used for end-of-travel indication. The remaining two rotors may be adjusted for any intermediate point-of-travel.
• Do not use abrasive cloth to clean the contacts on the limit switch.
• Do not attempt to repair gearing in the limit switch. Replace entire gear frame assembly if necessary.
4.5.1 Setting Limit SwitchThe maximum number of drive sleeve turns available is a funtion of actuator size, worm gear ratio, and type of switch. See Table 4.4. The Intermediate Shaft shown in Figure 4.5 may take a considerable number of turns before rotor trip occurs.
c WARNING: Potential Explosion Hazard. Do not use an electric drill for setting the limit switch in an explosive environment.
a CAUTION: When setting the limit switch rotor segments (cams) using a variable speed electric drill, do not run drill at speeds higher than 200 RPM. Operating the drill at high speeds can damage the gearing within the limit switch.
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Table 4.4 – Maximum Drive Sleeve Turns
Limit Switch Gearing PIC Gearing
Actuator Size W.G. Ratio 4-Gear 5-Gear PIC or R/I (270) RVDT(90)
L120-190 13.3:1 3110 31100 13706 4569
33:1 1250 12500 5521 1837
60:1 690 6900 3037 1012
85:1 N/A N/A N/A N/A
L120-420 10.33:1 N/A N/A N/A N/A
16:1 3300 33000 11405 3797
41:1 1280 12800 4445 1481
57:1 910 9100 3195 1065
80:1 N/A N/A N/A N/A
L120-800 12.67:1 N/A N/A N/A N/A
19:1 2850 28500 9586 3195
49:1 1050 10500 3720 1240
58:1 N/A N/A N/A N/A
86:1 N/A N/A N/A N/A
L120-2000 43:1 1210 12100 4234 1413
71:1 740 7400 2566 855
Figure 4.4 – Geared Limit Switch
Set the limit switch as shown on the following page. All item letters and piece numbers refer to Figure 4.5.
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Figure 4.5 – Setting Geared Limit Switch
Unless otherwise noted part numbers refer to Figure 4.5.
1. Open the Limit Switch Compartment Cover (piece #200-1 of Figure 7.3 for L120-190 and -420, Figure 7.6 for L120-800, and Figure 7.7 for L120-2000).
2. Put the actuator into manual operation. Use the handwheel to operate the valve in the “open” direction. While operating the valve, note the direction of rotation of the Intermediate Shaft corresponding to the rotor or rotors to be set.
3. When the valve is fully open, close it one turn of the handwheel to allow for coast of moving parts.
4. Push in the Clutch Screw and turn one-quarter turn. The rod will latch in this depressed position.
5. Refer to the applicable wiring diagram for contact development. The limit switch contact is closed when the rotor is engaged with the plunger. If the rotor to be set has not turned 90° to operate the plunger, turn the intermediate shaft in the same direction as noted in Step No. 2 until the rotor clearly trips the switches. This rotor is now set correctly.
6. If the intermediate position rotors 1 and 2 are also to be set at any desired position, repeat the setting operation in steps 1 through 5 above.
7. Before moving the valve, depress and turn the Clutch Screw counterclockwise one-quarter turn to the spring-released position. Insert a screwdriver into the intermediate shafts to ensure that they are loaded in position and will not rotate.
Contact Open Contact Close
Contact Plunger
Rotor Cam
Clutch Screw
Open
Clos
e
A
B
C
D
INT - 1INT - 2
Piece Quantity Description1 1 Gear Frame Assembly2 2 8-Switch Contact Block Assembly3 12 Rotor Segment (short)4 4 Rotor Shaft5 4 Machine Screw6 4 Flat Washer7 4 Lock Washer8 8 Hex Nut9 4 Rotor Segments (long)
1
6
5
78
ClutchScrew
49
3
2
Intermediate Shaft
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NOTE: The cross-slotted shafts A, B, C, and D have been designed for use with a No. 2 Phillips screwdriver shank chucked into a variable speed reversible electrical drill. Do not run drill at speeds higher than 200 RPM (see previous CAUTION on page 16).
a CAUTION: Do not operate the valve when the Clutch Screw is in a fully depressed position. Loss of contact setting will occur and the setting rod will be damaged.
8. Operate the valve by handwheel to the fully “close” position; reverse direction by one turn of the handwheel to remove backlash from gear components.
9. Set the other rotors by following steps 1 through 7.
10. Secure the Limit Switch Compartment Cover (piece #200-1 of Figure 7.3 for L120-190 and -420, Figure 7.6 for L120-800, and Figure 7.7 for L120-2000).
NOTE: For actuators having captive bolts, pull-down torque must not exceed 30 ft lbs.
4.5.2 Combination of ContactsRefer to Figure 4.5.
The rotor segments can be separated and rotated through 90° to give various combinations of normally open or normally closed contacts to each rotor.
1. Remove Nuts (piece #8) and Fillister Head Machine Screws (piece #5) for a total of two fasteners on each side of the switch.
2. Remove complete contact assembly from the back plate.
3. Rearrange cams on the camshaft to produce the required combination of contacts.
4. Replace contact assembly on back-plate (ensuring the registers fit correctly) and secure with the machine screws and nuts.
4.6 Position Indication4.6.1 Local Position IndicationThe local dial position indicator is factory-built per the application. The position indicator can only be adjusted when mounted on the valve.
Figure 4.6 – Position Indicators
NOTE: See the setting procedure on the following page.
MID-TRAVEL
CLOSE OPEN
25
50
75
100PERCENT OPEN
0
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To set the local position indicator:1. Disconnect all incoming power and remove Limit Switch Compartment Cover (piece #200-1 of
Figure 7.3 for L120-190, -420 and -800, and Figure 7.7 for L120-2000).
2. Using the handwheel place the valve in the fully “close” position.
3. Loosen the round head machine screw which holds the pointer in place; move the pointer to the “O” position, and re-tighten the screw.
The indicator is now set.
NOTE: The end-of-travel rotors of the geared limit switch activate “flip-flop” type indicators. This type of indicator will require no further setting after the geared limit switch has been adjusted.
4.6.2 Remote Position IndicationThe remote position indicator is a Limitorque digital position indicator. This indicator is a digital LED display module that displays valve position in 1% increments. The readout accepts inputs from signals of 4-20 mA, 0-2 V, or a 1000 ohm feedback potentiometer (mounted on the MDPI). The readout is accurate to 1% +/- 1 digit.
4.6.3 Calibrating Position Transmitter PT20SD1. Position the actuator to mid-travel value at 50% position.
2. Disconnect the potentiometer wiring harness from the PT20SD board and measure the resistance from each end connection to the center connection on the potentiometer.
3. Set the potentiometer to the correct resistance reading. Loosen the setscrew that retains the spur gear on the potentiometer shaft and rotate the shaft until a reading of 500 ohms is achieved.
4. Tighten the setscrew and reconnect the wiring harness to the PT20SD.
5. Run the actuator fully CLOSED.
6. Calibrate ZERO position by adjusting the zero potentiometer until a 4mA output signal is read at terminal +Ve and -Ve.
7. Run the actuator fully OPEN.
8. Calibrate SPAN position by adjusting the span potentiometer until a 20mA output signal is read at terminals +Ve and -Ve.
9. Repeat steps 5 through 8 and fine-tune as necessary.
Figure 4.7 – Typical Connection for a 1000 ohm Potentiometer
DC PowerSuppl y
-
+
-+
ReceiverGearing
1000 ohms
Customer Equipment
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5 Operation
c WARNING: See Sections 4.1 and 4.2 Safety Precautions and Safety Practices.
c WARNING: Do not manually operate the actuator with devices other than the installed Handwheel and Declutch Lever. Using force beyond the ratings of the actuator and/or using additive force devices such as cheater bars, wheel wrenches, pipe wrenches or other devices on the actuator Handwheel or Declutch Lever may cause serious personal injury and/or damage to the actuator or valve.
a CAUTION: Do not motor-operate the valve without first setting or checking the limit switch setting and motor direction. If the valve closes when the open button is pushed, the motor may need to be electrically reversed.
• Do not force the declutch lever into hand operation. If the clutch does not easily engage, rotate handwheel slowly while operating the declutch lever.
• Do not force the declutch lever into motor operation position. Lever returns to this position automati-cally when motor is energized.
• Do not run “plug” type valve against stop.
• Do not alternately start/stop the motor to open or close a valve that is too tight for normal operation.
5.1 Electrical Start-Up1. Verify that the actuator has been correctly lubricated. This is particularly important if the actuator
has been in long-term storage.
2. Verify that the geared limit switch has been correctly set per Section 4.5.1, Setting Limit Switch.
3. If the valve stem is not visible, remove the stem cover or handwheel cover plate to observe the output direction of the drive sleeve.
4. Engage manual operation and hand crank the valve well away from end-of-travel positions.
5. Turn on power supply and push the “open” button on the pushbutton station.
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6. Check output rotation:
• If phase rotation is correct, the valve should begin to open.
• If valve begins to CLOSE, STOP IMMEDIATELY. Incorrect phase rotation will lead to serious damage if the valve seats.
NOTE: For actuators supplied with the UEC-3 electronics controls package, if the output rotation is incorrect, select the opposite direction via the dipswitch setting.
7. Correct the phase rotation one of two ways:
• switch any two of the three power leads for three-phase power, or
• reverse the armature leads for DC power.
The actuator should operate correctly and will be stopped at the end-of-travel positions by torque or limit switch functions.
Premature stopping may be caused by incorrect limit switch or torque switch settings or obstructions in the valve.
5.1.1 Typical Wiring Diagram
Figures 8.1 through 8.4 are representations of typical applications and may not be applicable to your specific actuator. Please refer to the wiring diagram supplied with your actuator to confirm the actual equipment supplied. Check www.limitorque.com for the latest diagram revisions and/or related diagrams.
5.2 Manual OperationPiece numbers refer to Figures 7.1, 7.2, and 7.3 for L120-190 and -420, Figures 7.4, 7.5, and 7.6 for L120-800, and Figures 7.7 - 7.10 for L120-2000.
The actuator has a handwheel for manual operation. The actuator may be manually operated any time the motor is not engaged.
Manually operate as follows:1. Move the Declutch Lever (piece #10, #11) in the direction of the arrow until it latches into place. Do
not force the lever.
2. If the lever will not latch, rotate the Handwheel (piece #5) while turning the declutch lever and the lever will latch in place.
When the declutch lever is turned, it rotates a Cam which causes the Clutch Fork (piece #42-1) to move the Worm Shaft Clutch (piece #33) axially along the worm shaft against the force of a Clutch Spring (piece #45, #46). This disengages the mating lugs on the Worm Shaft Gear (piece #32) and the clutch, and engages the clutch with the Handwheel Gear (piece #17, #9). The Clutch Trippers (piece # 34-A and 34-B) maintain this position and latch onto the worm shaft gear. Turning the Handwheel (piece #5) rotates the Handwheel Shaft (piece #18) and the Handwheel Pinion. The handwheel pinion then drives the Handwheel Gear (piece #8, #9) which in turn drives the clutch. The clutch then drives the actuator in the same manner as in motor operation.
When the motor is energized, the motor pinion will turn the worm shaft gear. Tripper cams mounted on the worm shaft gear cause the trippers to release the clutch. The Clutch Fork (piece #42-1) is then forced, under spring pressure, to return the clutch to the motor operation position.
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NOTE: The shift from manual operation to motor operation is automatic and does not require external positioning of the declutch shaft.
5.3 Motor OperationThe actuator is always available for motor operation whenever the motor is energized.
a CAUTION: Do not force the declutch lever into motor operation. Lever will automatically return to motor operation when the motor is energized.
Reset the travel limit switches prior to motor operation if the actuator has been dismantled or removed from the valve. Piece numbers refer to Figures 7.1, 7.2, and 7.3 for L120-190 and -420, and Figures 7.4, 7.5, and 7.6 for L120-800.
In motor operation, the Motor Pinion (piece #31) drives the Worm Shaft Gear (piece #32), which drives the Worm Shaft Clutch (piece #33) through the clutch lugs on both the worm shaft gear and the clutch. The Worm Shaft (piece #17) is driven by splines on the OD of the worm shaft and on the ID of the clutch. The worm shaft is splined to the Worm (piece #30-1) which drives the Worm Gear (piece #13).
Two lugs on the worm gear are engaged by matching grooves in the Drive Sleeve (piece #8). This arrangement provides the no-lost-motion mode of operation and allows the worm gear to turn the drive sleeve. The worm gear lugs may also be oriented outside the grooves to give the lost-motion or hammerblow effect. The Stem Nut (piece #12) is rotated by internal splines on the ID of the drive sleeve and external splines on the OD of the stem nut. This causes a threaded stem to translate in a threaded stem nut and a keyed shaft to rotate in a keyed stem nut. Thrust is absorbed by Bearings (piece #40, #41, #14, and #67 ) located at the top and bottom of the drive sleeve.
5.4 Torque and Travel LimitingUnless otherwise stated, piece numbers refer to Figures 7.1, 7.2, and 7.3 for L120-190 and -420, and Figures 7.4, 7.5, and 7.6 for L120-800.
The Geared Limit Switch (piece #305 of Figure 7.6) is driven directly by the worm shaft gear through the limit switch pinion. Thus, the limit switch is directly connected to the output of the actuator and, once properly set, remains in step with the valve position regardless of the electric or manual operation of the actuator.
As the actuator increases torque, the worm and the Torque Spring Cartridge Assembly (composed of piece #'s 16-1 through 16-8) move axially along the worm shaft, compressing the disk spring packs. The torque spring assembly is calibrated such that a finite spring compression relates to a finite output torque. Axial worm movement causes movement of the bearing cartridge that is geared to the Torque Switch (piece #300). The torque switch is graduated and adjustable so it may be set to interrupt power to the motor at a predetermined output torque level.
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6.1 LubricationThe L120 series actuators have a totally sealed gear case, factory-lubricated with grease. The gear case can be mounted in any position.
a CAUTION: When the actuator is mounted in an upside-down orientation, the worm may not be completely immersed in lubricant. Check lubricant levels before operating the actuator.
No seal can remain absolutely tight at all times. Therefore, it is not unusual to find a very small amount of weeping around shaft seals—especially during long periods of idleness such as storage. Using grease minimizes this condition as much as possible. If a small amount of lubricant is weeping at start-up, remove it with a clean cloth. Once the equipment is operating on a regular basis, the weeping should stop.
6.1.1 Lubrication InspectionInspect Limitorque L120 series actuators for correct lubrication prior to operating—particularly following a long storage period.
Each application has its own effect on the actuator. The frequency of these inspections should be based on the application and the operating experience. The following lubrication inspection schedule is recom-mended until operating experience indicates otherwise.
For Gear Case, inspect lubrication every 18 months or 500 cycles, whichever occurs first.
During an inspection, consider the following:• Quantity – Ensure there is enough lubricant so that the Worm and the Worm Gear are totally
immersed in grease regardless of the position.
• Quality – Inspect lubricant for dirt, water or other foreign matter. If any one of these is found:
1. Flush the actuator with a commercial degreaser/cleaner such as Exxon Varsol #18. This degreaser/cleaner is not corrosive and does not affect the seal materials.
2. Repack the actuator with fresh lubricant, allowing room for grease thermal expansion.
6 Maintenance
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• Consistency – Ensure the lubricant is fluid approximating a standard NLGI-0 grade consistency or less. Thinners such as Amoco WAYTAC #31 oil may be added provided the volume of thinner does not exceed 20% of the total lubricant.
6.1.2 Factory LubricantGear Case• The L120-190 through 2000 is factory-lubricated with an NLGI Grade 00 lithium-base grease, suitable
for temperatures from 0°F to 225°F (-18°C to 107°C).
Geared Limit Switch• Mobil 28 (No Substitute)
Table 6.1 – Lubricant Weights
Actuator Size lb. kg
L120-190 15 5.6
L120-420 50 18.7
L120-800 Drive 1 71 26.5
L120-800 Drive 2 75 28
L120-2000 Drive 1 65 24.3
L120-2000 Drive 2 72 26.9
Minimum Lubricant Qualities RequiredThe standard lubricants used by Limitorque have been proven to be extremely reliable over years of service. Limitorque does not recommend a particular lubricant substitute for the standard lubricants; however, Limitorque does require the following lubricant qualities as a minimum.
a CAUTION: Do not mix lubricants of a different base chemical. Mixing lubricant bases may cause lubricant properties to be ineffective.
The lubricant must:• Contain an “EP” additive.
• Be suitable for the temperature range intended.
• Be water and heat-resistant and non-separating.
• Not create more than 8% swell in Buna N or Viton.
• Not contain any grit, abrasive, or fillers.
• Comply with a slump-prefer NLGI-00 grade.
• Not be corrosive to steel gears, ball, or roller bearings.
• Have a dropping point above 316°F (158°C) for temperature ranges of 0°F to 225°F (-18°C to 107°C).
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7 Disassembly and Reassembly
c WARNING: See sections 4.1 and 4.2 Safety Precautions and Safety Practices prior to disassembly.
c WARNING: Potential High Pressure Vessel. Before removing or disassembling your actuator, ensure that the valve or other actuated device is isolated and is not under pressure.
a CAUTION: Turn off all power services before attempting to perform service on the actuator.
NOTE: Remove the actuator from the valve for complex work. Minor work, such as replacing geared limit switch, torque switch or motor, may be readily performed while the actuator is still on the valve.
7.1 L120-190, -420, and -800 c WARNING: See sections 4.1 and 4.2 Safety Precautions and Safety Practices prior to
disassembly.
NOTE: The disassembly of the actuator L120–190 will be used as a general example. Always refer to the parts drawing when disassembling. Be certain to keep all parts clean and free from dirt after disassembly.
NOTE: Unless otherwise noted, piece numbers refer to Figures 7.1, 7.2 and 7.3 for L120-190 and -420, and Figures 7.4, 7.5 and 7.6 for L120-800.
7.1.1 To Replace Stem Nut Only c WARNING: Do not remove Locknut (piece #39) with actuator under load or with valve under
pressure. See Warning on Step No. 11 of Section 7.1.2 L120-190, 420, 800 Disassembly.
NOTE: If the valve must be left in service while the stem nut is replaced, the valve stem must be locked in such a way as to prevent any movement of the valve stem.
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Piece numbers refer to Figures 7.1, 7.2 and 7.3 for L120-190 and -420, and Figures 7.4, 7.5 and 876 for L120-800.
If the Stem Nut (piece #12) is to be removed from the assembled actuator, remove the Lock Nut (piece #39) and lift out top of nut.
1. The Lock Nut (piece #39) is staked in two places. Locate the stakes and spot with a drill.
2. Clean all metal particles and remove.
3. If the actuator is mounted on a valve having a threaded stem, and removal of the stem nut is required, perform Step No.1 and rotate the handwheel to close the valve.
4. The stem nut will rise up the threaded valve stem. When the stem nut splines are free from the drive sleeve, rotate the stem nut by hand the remaining length of the valve stem.
5. Replace if necessary.
6. Install the new stem nut with the lock nut.
7. Stake the top threads of the lock nut in two places.
7.1.2 L120-190, 420, 800 DisassemblyPiece numbers refer to Figures 7.1, 7.2 and 7.3 for L120-190 and -420, and Figures 7.4, 7.5 and 876 for L120-800.
1. Turn off power to the actuator.
2. Open or remove electrical Compartment Cover (piece #200-1).
3. Disconnect all electrical leads from the Torque Switch (piece #300) and Geared Limit Switch (piece #305). Ensure that all leads and terminals are clearly marked to facilitate reassembly.
4. Remove two screws holding limit switch and one holding torque switch. Remove both items.
5. Remove four bolts holding Motor (piece #124) and three bolts holding conduit Nipple Flange (piece #26). Remove motor, drawing motor leads through the conduit opening.
6. Replace Motor Pinion (piece #31). The motor pinion is keyed to the motor shaft and held there with a setscrew and lockwire to retain the pinion in its proper position. The motor pinion should be shouldered on the motor shaft.
7. Remove Handwheel (piece #5) by loosening setscrew. Handwheel can then be pulled from Handwheel Shaft (piece #18).
8. Remove Declutch Lever Subassembly (piece #11) by removing Extension Spring (piece #48), Retaining Ring (piece #53-4), Declutch Link (piece #10), and two hex head cap screws holding the subassembly in place. Remove subassembly.
9. Remove Spring Cartridge Cap (piece #4).
10. Remove Worm and Torque Spring Subassembly (piece #13, #30-1) completely. Temporarily replace the handwheel and then rotate in the close direction to cause the worm to screw out of engagement with worm gear and cause the torque spring cartridge to emerge from Housing (piece #1). See Step No. 21 to further disassemble the cartridge.
11. Remove Housing Cover (piece #3).
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c WARNING: Do not remove if a thrust load is on the actuator or if the valve is under pressure and not fully open, as personal injury may result.
12. Lift complete drive sleeve assembly from actuator housing. The drive sleeve assembly consists of Lock Nut (piece #39), Stem Nut (piece #12), Drive Sleeve (piece #8), Upper Thrust Bearings (piece #40, #67), Worm Gear (piece #13), Worm Gear Spacer (piece #36) and Lower Thrust Bearing (piece #14). The drive sleeve assembly may be further dismantled if required by pressing off Lower Drive Sleeve Bearing (piece #41).
13. Remove Retaining Ring (piece #53-1), Split Ring Retainer (piece #27) and Conduit Nipple (piece #26). Pull the Worm Shaft Clutch Gear (piece #32) from the worm shaft.
14. Spread clutch trippers with a tool to shift actuator into motor operation.
c WARNING: Do not use hands as spring forces could result in personal injury.
15. Remove bolts holding Declutch Housing (piece #2) to Housing (piece #1). Remove clutch housing, Trippers (piece #34-A and #34-B), and Clutch Fork Assembly (piece #42-1). Worm Shaft Clutch (piece #33) will slide off worm shaft when removing clutch housing.
16. Slide Clutch Spring (piece #45) off worm shaft toward motor end.
17. Remove Elastic Stop Nut (piece #16-7). Pull Handwheel Spur Gear (piece #9) that is keyed to Shaft (piece #17).
18. Remove bolts holding WS Bearing Cap (piece #7) and slide cap off wormshaft. Remove Handwheel Clutch Pinion (piece #20) from bearing cap by removing Retaining Ring (piece #53-3). Be careful not to lose Handwheel Pinion Spring (piece #47) and Spring Ring (piece #49).
19. Remove Handwheel shaft: tap on the motor end of the shaft to free Ball Bearing (piece #52-1) from housing. Handwheel shaft will break free from Ball Bearing (piece #52-6). Remove handwheel shaft from housing.
20. Withdraw handwheel shaft from handwheel end of housing.
21. To disassemble worm assembly further (removed in Step No. 10), remove Elastic Stop Nut (piece #16-7), noting the number of turns to remove.
22. Remove Thrust Washers (piece #16-2), Limit Sleeve (piece #16-5), and Belleville Disc Springs (piece #16-3 and #16-4). Note the orientation of the discs for reassembly later.
23. Remove Retaining Ring (piece #53-4).
24. The Bearing Cartridge (piece #16-1) and Worm Subassembly (piece #30-1) can now be withdrawn.
25. Remove the Ball Bearing (piece #52-7), locate setscrew in bearing locknut and remove setscrew and Locknut (piece #44-1).
7.1.3 Reassembling Actuator Sizes L120-190, -420 and -8001. Follow the disassembly instruction for Actuator Sizes 190, 420, and 800 in the reverse order and
follow the gasketing instructions below.
2. Stack Belleville disc, thrust washers, and spacers that were removed in the exact order as they were removed.
3. Re-install Elastic Stop Nut (piece #16-7) with the same number of turns used to remove.
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4. For the Worm Shaft Clutch (piece #33), install the clutch with smaller set of lugs first to engage with lugs on Handwheel Clutch Pinion (piece #20).
5. For worm, rotate Worm Shaft Clutch (piece #33) to engage splines on worm shaft. Place actuator in manual operation, replace Declutch Lever Subassembly (piece #11), and handwheel temporarily; rotate handwheel in opposite direction used to remove worm.
6. When re-installing the Motor Pinion (piece #31), ensure it fits tightly on the motor shaft (preferably a light press fit).
7.1.4 Gaskets All gaskets, except the housing cover gaskets, are 1⁄32" thick Anchorite. The housing cover gaskets vary in thickness. Determine the correct size as follows: 1. Clean both housing cover and main housing gasketed surface.
2. Install actuator drive sleeve assembly complete with bearings.
3. Install housing cover and measure the gap between the housing cover and the main housing.
4. Add 10% to the measurement. Use the closest nominal gasket thickness or combination available.
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Figure 7.1 – L120-190 and -420 Drive Sleeve Side View (Refer to Table 7.1 for parts list)
54-4
37
154
-312
38
6365
6466
55-5
55-1
1
6160
61-1
54-7 40 36 41 1467 8 13
356
-355
-155
-239
Drawing 01-608-0115-4
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Figure 7.2 – L120-190-and 420 Worm Shaft Side View (Refer to Table 7.1 for parts list)
56-1
4 56-9
54-6
53-7
53-8
1852
-69
2956
-10
55-6
55-7
53-4
4354
-856
-13
1156
-719
1042
-158
4856
-531
55-1
054
-950
56-6
56-1
856
-854
-155
-9
182
5
455
-355
-416
-716
-616
-444
-156
-15
53-3
54-1
52-3
56-1
152
-37
44-2
54-2
16-3
16-2
16-5
16-1
52-7
53-2
52-8
3520
4749
4533
251
2732
2328
53-1
1730
-130
-253
-5
56-1
252
-146
57
Drawing 01-608-0116-4
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Figure 7.3 – L120-190 and -420 Top View (Refer to Table 7.1 for parts list)
124
34-A
42-5
42-4
56-2
156
-20
56-2
3
54-5
200-
220
0-3
300
204
310
305
34-B
1556
-19
2670
-170 71
70-2 20
0-1
Drawing 01-608-0117-4
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Figure 7.4 – L120-800 Drive Sleeve Side View (Refer to Table 7.1 for parts list)
56-3 3
54-7
54-4 40 13
154
-38
1214
Drawing 01-608-0138-4
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Figure 7.5 – L120-800 Worm Shaft Side View (Refer to Table 7.1 for parts list)
56-9
54-6
52-1
54-2
118
56-1
0
53-7
6952
-656
-15
55-7
56-1
253
-454
-819
56-7
54-1
56-1
354
-942
-134
11 50 55-8
10 48
56-5
56-6
56-2
0
54-1
55-9
55-1
058 56
-11
31 56-8
28 53-1
23
29
55-6
43
56-2
9
5
56-1
4
182
444
-1 44-2
16-5
16-2
44-2
52-7
30-2
1756
-15
53-3
16-2
16-3
16-1
44-1
16-8
30-1
52-8
747
4920
45332
52-3
3251
52-3
Drawing 01-608-0136-4
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35
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Figure 7.6 – L120-800 Top View (Refer to Table 7.1 for parts list)
Drawing 01-608-0137-4
56-1
856
-21
56-2
556
-25
42-4
42-5 34 26 15 68
56-1
9
70-1
70-2
55-3
55-4
6-1
6-2
300
54-5
56-2
3
305
310
204
6
70 71
34
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
36
Table 7.1 – L120-190, -420 and -800 typical parts list
Piece No. Quantity Description Piece No. Quantity Description
1 1 Housing 38 1 Seal Retainer Plate
2 1 Declutch Housing 39 1 Lock Nut
3 1 Housing Cover 40 1 Upper Thrust Bearing Cup
4 1 Spring Cartridge Cap 41 1 Lower Thrust Bearing Cone
5 1 Handwheel 42-1 1 Declutch Fork
6 1 Limit Switch Compartment Cover (L120-800 only) 42-4 2 Fork Roller (L120-420, 800)
6-1 1 Hex Head Cap Screw (L120-800 only) 42-5 2 Fork Roller Pin (L120-420, 800)
6-2 1 Lockwasher (L120-800 only) 43 1 Declutch Lever Plate
7 1 Worm Shaft Bearing Cap (L120-420, 800) 44-1 1 Lock Nut
8 1 Drive Sleeve (2 pc) 44-2 1 Set Screw
9 1 Handwheel Spur Gear 45 1 Clutch Spring
10 1 Declutch Link 46 1 Handwheel Shaft Spacer
11 1 Declutch Lever 47 1 Handwheel Pinion Spring
12 1 Stem Nut 48 1 Extension Spring
13 1 Worm Gear 49 1 Spring Ring
14 1 Lower Thrust Bearing Cup 50 1 Declutch Lever Nameplate
15 1 Fork Pivot Pin (L120-420, 800) 51 1 Worm Shaft Gear Cam Pin
16-1 1 Bearing Cartridge 52-1 1 Ball Bearing (L120-190)
16-2 various Thrust Washer 52-1 1 Bushing (L120-420, 800)
16-3 various Belleville Spring 52-3 2 Motor Clutch Gear Bushing
16-4 various Belleville Spring 52-6 1 Ball Bearing
16-5 1 Torque Limit Sleeve 52-7 1 Ball Bearing
16-6 1 Torque Limit Sleeve 52-8 2 Ball Bearing
16-7 1 Elastic Stop Nut (L120-190 only) 53-1 1 Retaining Ring
16-8 1 Bearing Cartridge Stem (L120-420, 800) 53-2 1 Retaining Ring
17 1 Worm Shaft 53-3 1 Retaining Ring
18 1 Handwheel Shaft 53-4 1 Retaining Ring
19 1 Declutch Shaft 53-5 1 Retaining Ring
20 1 Handwheel Clutch Pinion 53-7 1 Retaining Ring
23 1 Split Ring 53-8 1 Retaining Ring (L120-190 only)
26 1 Motor Conduit Nipple 54-1 2 Declutch Housing Gasket
27 1 Split Ring Retainer 54-2 1 Spring Cartridge Cap Gasket
28 1 Lock Nut 54-3 1 Quad Ring
29 1 Worm Bushing 54-4 1 Quad Ring
30-1 1 Worm 54-5 1 O-Ring
31 1 Motor Pinion 54-6 1 O-Ring (L120-190)
32 1 Worm Shaft Gear 54-6 1 Oil Seal (L120-420, 800)
33 1 Worm Shaft Clutch 54-7 1 O-Ring (L120-190)
34-A 1 Clutch Tripper #1 54-7 1 Gasket (L120-420, 800)
34-B 1 Clutch Tripper #2 54-8 1 O-Ring
35 1 Spring Spacer 54-9 1 Chekseal
36 1 Worm Gear Spacer 55-1 12 Hex Head Cap Screw
37 1 Housing Cover Shim Set 55-2 12 Lockwasher
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37
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Table 7.1 Continued – L120-190, -420 and -800 typical parts list
Piece No. Quantity Description Piece No. Quantity Description
55-3 7 Hex Head Cap Screw 56-23 1 Pipe Plug
55-4 various Lockwasher 56-25 2 Dowel Pin (L120-420, 800)
55-5 2 Socket Head Cap Screw 57 1 O-Ring Spacer (L120-190)
55-6 various Hex Head Cap Screw (L120-190, 420) 58 1 Tripper Spring
55-7 various Lockwasher 60 1 Terminal Bracket
55-8 2 Drive Screw 61 2 Terminal Strip
55-9 4 Hex Head Cap Screw 61-1 2 Kulka Insulator Strip
55-10 4 Lockwasher 63 2 Fil HD Mach Screw
55-11 2 Lockwasher (L120-190) 64 2 Lockwasher
56-2 various Pipe Plug 65 8 RD HD Mach Screw
56-3 1 Grease Fitting 66 8 Lockwasher
56-5 1 Clevis Pin 67 1 Upper Thrust Bearing Cone
56-6 1 Key 68 2 Fork Spacer (L120-420, 800)
56-7 1 Key 69 1 Handwheel Bearing Cap (L120-420, 800)
56-8 1 Key 70 1 Hinge
56-9 1 Socket Head Set Screw 70-1 various Hex Head Cap Screw
56-10 1 Key 70-2 various Lockwasher
56-11 1 Flat Washer (L120-190) 71 1 Hinge Standard Compartment
56-11 1 Socket Head Set Screw (L120-420, 800) 124 1 Motor
56-12 1 Flat Washer 182 1 Handwheel Spinner Kit
56-13 1 Socket Head Set Screw 200-1 1 Limit Switch Compartment Cover (L120-190, 420)
56-14 1 Key 200-2 various Hex Head Cap Screw (L120-190, 420)
56-15 various Socket Head Cap Screw 200-3 various Lockwasher (L120-190, 420)
56-18 various Socket Head Cap Screw 204 1 M.D.P.I. Sight Glass
56-19 1 Socket Head Set Screw 300 1 Torque Switch
56-20 4 Socket Head Set Screw 305 1 Geared Limit Switch
56-21 4 Lockwasher 310 1 Mechanical Dial Position Indicator
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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7.2 L120-2000 c WARNING: See sections 4.1 and 4.2 Safety Precautions and Safety Practices.
NOTE: The L120-2000 Drive 2 is a thrust-type actuator consisting of an L120-2000 Drive 1 torque-type actuator mounted on a thrust bearing assembly. For torque-only actuators see Section 8.2.2, Drive 1 Disassembly (Torque Housing).
NOTE: Piece numbers refer to Figures 8.7 - 8.10.
7.2.1 Drive 2 Disassembly (Thrust Housing Only) c WARNING: Before proceeding, ensure that the actuator is not under load and that the valve is
not under pressure. If so, the valve must be in fully open position.
Remove Drive Sleeve Locknut (piece #130):
1. Rotate handwheel to close valve, causing the Stem Nut (piece #127) to rise up threaded valve stem until the stem nut splines are free of Drive Sleeve (piece #126).
2. Rotate stem nut by hand for the remaining length of the valve stem and remove.
Remove Thrust Adapter (piece #125):
NOTE: If disassembly of thrust adapter assembly is not required, continue to Section 8.2.2, Drive 1 (Torque Actuator), Step No. 1.
1. Remove Seal Retainer Plate (piece #129) and Oil Seal (piece #54-6).
2. Loosen setscrew and remove Thrust Bearing Cartridge (piece #128) from the Thrust Adapter Housing (piece #125).
3. Remove Upper Bearing Roller Assembly (piece #131).
4. Lift Thrust Drive Sleeve (piece #126) out of Thrust Adapter Housing (piece #125).
5. Remove Lower Bearing Roller Assembly (piece #131).
7.2.2 Drive 1 Disassembly (Torque Housing)1. Remove Limit Switch Compartment (piece #200-1).
2. Disconnect motor leads, Torque Switch (piece #301) leads, and Geared Limit Switch (piece #305) leads.
NOTE: Ensure leads are labeled for reassembly.
3. Remove screws holding Limit Switch and holding Torque Switch. Remove both items.
4. Remove bolts holding Motor.
5. Remove Motor Adapter (piece #22) and Motor Adapter Gasket (piece #105). Remove motor gear shims from the motor adapter bearing bores and store in a safe place.
6. Remove Intermediate Pinion (piece #32-1) and the Drive Shaft Gear (piece #32-2).
7. Remove torque switch and geared limit switch.
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8. Using lifting eyebolts, remove Housing Cover (piece #3), Drive Sleeve (piece #8), and Worm Gear (piece #13).
9. Remove Handwheel Washer (piece #88). Pull off Handwheel (piece #5) and Handwheel Clutch (piece #83) from Handwheel Shaft (piece #18).
10. Remove Worm Shaft End Cap (piece #4) and Declutch Housing Cover (piece #86).
11. Remove Declutch Assembly:
A. Remove Declutch Lever Stop (piece #93), Tripper Spring (piece #58), Clutch Trippers (piece #34-A and #34-B) and Roll Pin (piece #19-7).
B. Loosen setscrews on Declutch Lever (piece #11) and Hallowell Collar (piece #56-8). Remove declutch lever, Declutch Shaft and Cap (piece #95), and slide Declutch Shaft (piece #19-1) out through bottom of actuator.
C. Remove Declutch Lever (piece #11), and other Declutch Shaft-Mounted Components (piece #19-2, #91, #92, and #56-8).
D. Remove Handwheel Shaft and Pinion (piece #18).
12. Remove Drive Shaft (piece #77) and Flexible Jaw Clutch (piece #82-1) as integral assembly. Remove Gear Clutch Spacer (piece #78), Sliding Gear Clutch (piece #33), and Clutch Compression Spring (piece #46).
13. Remove Splined Insert (piece #87) using jack screws. Remove Spirolox Ring (piece #53-3) and Handwheel Gear (piece #9).
14. Remove Gear Mounting Bracket (piece #84) using jack screws, Bearing (piece #52-7), and Bearing Adapter (piece #79).
15. Pull Hollow Drive Shaft (piece #17) toward declutch end and remove Spirolox Ring (piece #53-8).
16. Remove Declutch Housing (piece #2).
17. Remove Hollow Drive Shaft (piece #17):
A. Push hollow drive shaft toward motor end. Loosen setscrew and remove Bearing Locknut (piece #80-1) – hold hollow drive shaft using adjustable spanner on splines.
B. Remove Bearing (piece #52 -8) by pushing hollow drive shaft toward declutch end.
C. Remove Gear Limit Thread Collar (piece #76) and key.
D. Remove hollow drive shaft from declutch end of actuator.
18. Loosen setscrew in Cartridge Stem Locking Nut (piece #16-10) and replace Declutch Housing (piece #2) with two screws to compress torque spring.
19. Remove Locking Nut (piece #16-10).
a CAUTION: Declutch Housing is under spring load.
20. Remove Declutch Housing (piece #2):
A. Pull Bearing Cartridge Stem (piece #16-8) out partially.
B. Remove Thrust Washers (piece #16-2), Torque Limit Sleeve (piece #16-5) and Springs (piece #16-3).
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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21. Remove bearing cartridge/worm assembly from actuator. To disassemble further:
A. Loosen two setscrews on Bearing Cartridge Cap (piece #16-1), and unscrew Bearing Cartridge Stem (piece #16-8).
B. Slide bearing cartridge cap off toward worm threads.
C. Loosen setscrew and remove Bearing Locknut (piece #44-1).
D. Press off two Bearings (piece #73).
7.2.3 Drive 1 (Torque Housing) Reassembly1. Press two Bearings (piece #73) onto worm. It may be necessary to apply heat to the bearings.
Ensure that the bearing spacer is installed.
2. Install Bearing Lock Nut (piece #44-1) and tighten screw.
3. Apply head to Bearing Cartridge Cap (piece #16-1) and drop on bearing from worm end. Ensure that cartridge cap seats on bearing.
4. Install bearing cartridge/worm assembly in housing.
5. Replace the following in the order listed:
A. Thrust Washer (piece #16-2)
B. Belleville Springs (piece #16-3)
C. Torque Limit Sleeve (piece #16-5)
D. Thrust Washer (piece #16-2)
Ensure flat side of thrust washer is against springs.
6. Thread Cartridge Stem Nut (piece #16-10) onto Bearing Cartridge Stem (piece #16-8) by hand.
7. Slide bearing cartridge/worm assembly into housing.
8. Install Hollow Drive Shaft (piece #17).
9. Install Gear Limit Threaded Collar (piece #76) and key on motor end of hollow drive shaft with threaded end toward worm.
10. Slide Bearing (piece #52-8) onto shaft.
11. Thread Bearing Locknut (piece #81-1) on shaft and tighten setscrew. Hold Drive Shaft using adjust-able spanner on splines.
12. Re-install motor as follows:
A. Push Hollow Drive Shaft (piece #17) to declutch and install Bearing Spacer (piece #101).
B. Install motor gearing by meshing Drive Shaft Gear (piece #32-2) and Intermediate Pinion (piece #32-1) and pressing combined assembly into housing bores.
C. Install motor gear shims in motor adapter bearing bores and install Motor Adapter Gasket (piece #105) and Motor Adapter (piece #22). Tap adapter to ensure bearings seat.
D. Check intermediate pinion and shaft for proper shims.
E. Install motor.
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13. Re-install declutch housing as follows:
A. Install Spirolox Ring (piece #53-8) on Hollow Drive Shaft (piece #17).
B. Install Declutch Housing (piece #2) using two screws only to compress Belleville Spring Set (piece #16-3).
C. Using two screws, thread Cartridge Stem Nut (piece #16-10) on Bearing Cartridge Stem (piece #16-8) until nut is snug against Thrust Washer (piece #16-2).
D. Re-install declutch housing.
14. Install Bearing Mounting Bracket Assembly (piece #84, 79, and 52-7).
15. Install Handwheel Gear (piece #9) and Spirolox Ring (piece #53-8).
16. Install Splined Insert (piece #87), Spring Washer (piece #49) and Clutch Compression Spring (piece #46).
17. Install Sliding Gear Clutch (piece #33) onto Hollow Drive Shaft Splines (piece #17).
18. Install Drive Shaft (piece #77), ensuring that Gear Clutch Spacer (piece #78) is in place. Align splines on drive shaft and drive shaft gear and push drive shaft into actuator from declutch end.
19. Mount Bearing (piece #52-6 and #52-1) on Handwheel Shaft and Pinion (piece #18) and install assembly into actuator.
20. Install Declutch Shaft (piece #19-1) and Torsion Spring (piece #94) into Declutch Cap (piece #95).
21. Install declutch shaft assembly through bottom of Declutch Housing (piece #2). Declutch shaft assembly consists of:
• Declutch Shaft
• Declutch Shaft Washers (piece #91, 3 pieces)
• Torsion Spring
• Declutch Fork (piece #42-1)
• Declutch Cap
• Declutch Spacer (piece #92)
• Declutch Lever Drum (piece #19-3)
• Hallowell Collar (piece #56-8)
• Declutch Arm (piece #19-2)
NOTE: Declutch shaft must be installed with key seat facing right side of the declutch housing when viewed from declutch end of actuator.
22. Fasten declutch cap.
23. Insert Roll Pin (piece #19-7) through declutch arm and shaft.
24. Ensure that declutch shaft bears against declutch cap, push collar against top of housing, and tighten collar setscrew.
25. Ensure that Oil Seal (piece #54-8) is in place.
26. Install Declutch Lever (piece #11) and tighten setscrew.
27. Rotate declutch lever clockwise, hold in position, and install Declutch Lever Stop (piece #93).
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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28. Install Clutch Tripper (piece #34-A, 34-B) and Tripper Spring (piece #58).
29. Install Declutch Housing Cover (piece #3) and Declutch Cover Gasket (piece #54-11).
30. Ensure that Handwheel Oil Seal (piece #54-8) is in place.
31. Install Worm Shaft End Cap (piece #4) and Worm Shaft End Cap Gaskets (piece #54-2).
NOTE: Ensure that the same number of gaskets is installed as were removed during disassembly. Thickness of gaskets must be sufficient to prevent end cap from bearing on drive shaft.
32. Install Worm Gear (piece #13).
33. Install Torque Drive Sleeve (piece #8) and Drive Sleeve Thrust Bearing (piece #40).
34. Apply fresh, clean lubricant in actuator housing. For quantity see Section 7.1, Lubrication.
35. Install Housing Cover Gasket (piece #54-7) and Housing Cover (piece #3).
36. Install Handwheel Clutch (piece #83), Handwheel (piece #5), and Handwheel Washer (piece #88) on Handwheel Shaft and Pinion (piece #18).
37. Install Torque Switch (piece #301) and Geared Limit Switch (piece #305).
38. Connect motor leads and leads to torque switch and geared limit switch.
7.2.4 Drive 2 (Thrust Housing Only) Reassembly1. If Thrust Adapter Assembly (piece #125) is not disassembled, go to Step No. 7.
NOTE: Thrust bearing races should be pressed on Thrust Drive Sleeve (piece #126), in Thrust Adapter Housing (piece #125), and Thrust Bearing Cartridge (piece #128) prior to beginning assembly procedure.
2. Install Lower Bearing Roller Assembly (piece #131) in Thrust Adapter Housing (piece #125).
3. Install short end of Thrust Drive Sleeve (piece #126) into Thrust Adapter Housing (piece #125).
4. Install Upper Bearing Roller Assembly (piece #131) on the Thrust Drive Sleeve (piece #126).
5. Install Thrust Bearing Cartridge (piece #128), thread tight, or until drag is felt on thrust drive sleeve and tighten screw.
6. Install Oil Seal (piece #54-6) and Seal Retainer Plate (piece #129).
7. Lift actuator or turn upside down. Install Housing Thrust Adapter Assembly (piece #125). Ensure that Thrust Drive Sleeve O-Ring (piece #134) is in place.
8. Install Stem Nut (piece #127).
9. Install Drive Sleeve Locknut (piece #130) and crimp or stake the top threads to two places.
c WARNING: Drive sleeve locknut has left-hand threads and must be rotated counterclockwise.
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Figure 7.7 – L120-2000 Drive Sleeve Side View (Refer to Table 8.2 for parts list)
Drawing 01-608-0141-4_2of3
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Figure 7.8 -L120-2000 Top View (Refer to Table 8.2 for parts list)
83
8611
182
54-1
417356
-13
54-1
152
-644
-154
-652
-1
76 56-7
32-1
32-1
31-2
52-9
52-8
Mot
or
105
77 22
101
81-1
81-2
31-2
52-8
305
200-
1 30-1
30-2
16-1
16-8
16-3 16
-516
-10
16-2
16-2
79
8449
4685
898733
82-6
82-1
82-7
82-4
82-3
82-2
885 80-1
454-2
52-1
182
78
952
-753
-353
-816
270
17
Drawing 01-413-0036-4Drawing 01-413-0036-4
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45
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Figure 7.9 – L120-2000 Side View (Refer to Table 8.2 for parts list)
Drawing 01-608-0141-4_3of3
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Figure 7.10 - L120-2000 Exploded View
Drawing 08-408-0002-4
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47
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
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Table 7.2 - L120-2000 typical parts list
Piece No. Quantity Description Piece No. Quantity Description
1 1 Housing 50 1 Declutch Lever Nameplate
2 1 Declutch Housing 52-1 1 Ball Bearing
3 1 Housing Cover 52-6 1 Handwheel Shaft Bearing
4 1 Worm Shaft End Cap 52-7 1 Ball Bearing
5 1 Handwheel 52-8 1 Ball Bearing
8 1 Drive Sleeve 52-9 1 Ball Bearing
9 1 Handwheel Gear 53-3 1 Spirolox Ring
11 1 Declutch Lever 53-8 1 Spirolox Ring
13 1 Worm Gear 53-9 1 Retaining Ring
14 1 Bearing Cup 54-1 1 Declutch Housing Gasket
16-1 1 Bearing Cartridge Cap 54-2 2 Worm Shaft End Cap Gasket
16-2 2 Thrust Washer 54-3 1 Quad Ring
16-3 various Belleville Spring 54-5 1 O-Ring
16-5 1 Torque Limit Sleeve 54-6 1 Oil Seal
16-8 1 Bearing Cartridge Stem 54-7 3 Housing Cover Gasket
16-10 1 Cartridge Stem Locking Nut 54-8 1 Oil Seal
17 1 Hollow Drive Shaft 54-10 1 Declutch Cap Gasket
18 1 Handwheel Shaft and Pinion 54-11 1 Declutch Cover Gasket
19-1 1 Declutch Shaft 55-1 1 Hex Head Cap Screw
19-2 1 Declutch Arm 55-2 1 Lockwasher
19-3 1 Declutch Shaft Drum 55-3 1 Welsh Plug
19-5 1 Groove Pin 55-4 1 Soc Head Set Screw
19-6 1 Roll Pin 55-5 1 Lockwasher
19-7 1 Roll Pin 55-6 1 Soc Head Set Screw
22 1 Motor Adapter 55-7 1 Lockwasher
30-1 1 Worm 55-8 1 Soc Head Set Screw
30-2 1 Worm Bushing 55-9 1 Lockwasher
31-1 1 Motor Pinion 55-10 1 Jam Nut
31-2 1 Intermediate Gear 55-11 1 Flat Head Mach Screw
32-1 1 Intermediate Pinion 55-12 1 Soc Head Set Screw
32-2 1 Output Worm Shaft Gear 55-14 1 Lockwasher
33 1 Sliding Gear Clutch 55-15 1 Drive Screw
34-A 1 Clutch Tripper 56-5 1 Grease Fitting
34-B 1 Clutch Tripper 56-7 1 Key
36 1 Worm Gear Spacer 56-8 1 Hallowel Collar
37 1 Shim Set Bearing 56-9 1 Soc Head Set Screw
40 1 Bearing Cup 56-10 1 Lockwasher
41 1 Bearing Cone 56-12 1 Soc Head Set Screw
42-1 1 Declutch Fork 56-13 2 Tripper Bolt
42-4 1 Fork Roller 56-15 1 Key
42-5 1 Roller Pinion 56-16 1 Key
44-1 1 Bearing Locknut 56-17 1 Soc Head Set Screw
46 1 Clutch Compression Spring 56-20 1 Soc Head Set Screw
49 1 Spring Washer 56-21 1 Soc Head Set Screw
![Page 48: USER INSTRUCTIONS - Flowserve · 2020-01-02 · If damaged, immediately report the damage to the transport company. 2. Record the actuator nameplate information for future reference,](https://reader033.vdocuments.us/reader033/viewer/2022043014/5fb1efe04f8fdd31bc779821/html5/thumbnails/48.jpg)
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
48
Table 7.2 Continued - L120-2000 typical parts list
Piece No. Quantity Description Piece No. Quantity Description
58 1 Tripper Spring 102 1 Gear Insert
70 1 Hinge 103 1 Split Ring
70-1 1 Hex Head Cap Screw 104 1 Retaining Ring
70-2 1 Lockwasher 105 1 Motor Adaptor Gasket
73 2 Bearing Cup 106 1 Hex Head Cap Screw
76 1 Gear Limit Threaded Collar 107 1 Lockwasher
77 1 Solid Drive Shaft 114 1 Hex Head Cap Screw
78 1 Gear Clutch Spacer 122 1 Thrust Drive Sleeve
79 1 Bearing Adapter 125 1 Thrust Adapter Housing
80-1 1 Bearing Locknut 126 1 Thrust Drive Sleeve
81-1 1 Bearing Locknut 127 1 Stem Nut
81-2 1 Bearing Locknut 128 1 Bearing Cartridge
82-1 1 Flexible Jaw Clutch Housing 129 1 Seal Retainer Plate
82-2 1 Motor Clutch Gear Cam Pin 130 1 Drive Sleeve Locknut
82-3 1 Flexible Jaw Clutch Sleeve 131 1 Bearing Roller Assembly
82-4 1 Nylon Insert 132 1 Oil Seal
82-5 1 Nylon Insert 133 1 Grease Fitting
82-6 6 Clutch Sleeve Insert 134 1 O-Ring
82-7 1 Flexible Jaw Clutch Collar 135 1 Housing Thrust Adapter Gasket
83 1 Handwheel Clutch 136 1 Hex Head Cap Screw
84 1 Gear Mounting Bracket 137 1 Lockwasher
85 1 Handwheel Gear Bushing 138 1 Soc Head Set Screw
86 1 Declutch Housing Cover 139 1 Soc Head Set Screw
87 1 Splined Insert 140 1 Seal Retainer Sleeve
88 1 Handwheel Washer 141 1 Lockwasher
89 1 Handwheel Gear Spacer 162 1 Motor Adapter Gasket
90 1 Stop Stud 182 1 Handwheel Spinner Kit
91 3 Declutch Shaft Washer 200-1 1 Limit Switch Compartment Cover
92 1 Declutch Shaft Spacer 200-2 1 Hex Head Cap Screw
93 1 Declutch Lever Stop 200-3 1 Lockwasher
94 1 Torsion Spring 301 1 Torque Switch
95 1 Declutch Cap 305 1 Geared Limit Switch
101 1 Bearing Spacer
![Page 49: USER INSTRUCTIONS - Flowserve · 2020-01-02 · If damaged, immediately report the damage to the transport company. 2. Record the actuator nameplate information for future reference,](https://reader033.vdocuments.us/reader033/viewer/2022043014/5fb1efe04f8fdd31bc779821/html5/thumbnails/49.jpg)
49
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
flowserve.com
Figure 8.1 – Wiring Diagram – No Controls
MOTOR
CL1
4 18 18C
8 17 17C
(18) (18C)
18
(4) (4C)
(5) (5C)
(8) (8C) (17C)(17)
(1C)(11
5
4
8 1717
CL1
3C
4
18
T1 T2 T3
H2H
18 17
OPEN CLOSE
18C18
(17) (17C)(18) (18C)
00000
NOTES
0 30 0
JUMPERSEE NOTE#4
0
18
18C
CL1
7C
8
17
17
17C
LEGEND
STANDARD
16-476-1047-301-6-88
K.Horton
P P2 P3
TORQUE SWITCH
ELECTRICAL COMPARTMENT
P
P2
P3
22
TO CUSTOMER'SEQUIPMENT
105161A
3
7
(7C)(7)
(3) (3C)
7C
3C
POT(OPTIONAL)
POT(OPTIONAL)
H H2 CL2
COMP HTR-COMPARTMENT HEATERMTR HTR-MOTOR HEATERTH. OL.-THERMAL OVERLOAD CONTACTSPOT-SLIDEWIRE TRANSMITTER(SEE CERTIFICATION SHEET IF REQUIRED)
GEAR LIMIT SWITCH
17C
TH.OL
T3
T2
T1MOTOR
MTR HTR
H1
H2
22
CL2
0
BY-PASS CIRSPARE
INDICATIONOPEN LIMIT
BY-PASS CIRSPARE
INDICATIONCLOSE LIMIT
SPARESPARESPARESPARESPARESPARESPARESPARE
FULLYOPEN A B FULLY
CLOSED
.VALVE SHOWN IN FULL OPEN POSITION
0
3.ROTORS INT.1 & INT.2 CAN BE SET AT VALVEPOSITION FULL OPEN, FULL CLOSED OR ANYPOSITION IN BETWEEN AS INDICA TED BYPOINT A AND B.4.ADD JUMPER ON LS#8 BETWEEN TERMINALS 8& 8C FOR TORQUE SEATING VALVES.
TH.OLTHERMAL OVERLOAD CONTACTS
CL222
H H2
P P2 P3
T3
T2
T1
INDICATION
OPEN CIRCUIT
CLOSE CIRCUIT
HEATERSCOMP HTR
MTR HTR
COMP HTR
(4)
(4C)
8
(8C)
(8)
(1)
(1C)
(2)
(2C)
(3)
(3C)
(5)
5
(5C)
6
(6C)
(7)
7
(7C)
CLOSE ROTOROPEN ROTOR
(9)
9
(9C)
(10)
10
(10C)
(11
1
(11C)
(12C)
1
(12C)
(13)
13
(13C)
(14)
14
(14C)
(15)
15
(15C)
(16)
16
(16C)
INT.1 ROTOR INT.2 ROTOR
4
3
2
1
(6)
LIMIT SWITCH CONTACT DEVELOPMENTVALVE POSITION
ROTOR
OPEN
CLOSE
INT.1
INT.2
FUNCTION
12345678
9
111213141516
CONT
ACT
OPENING TORQUE SWITCH INTERRUPTS CONTROL CIRCUIT IFMECHANICAL OVERLOAD OCCURS DURING OPENING CYCLE.
CLOSING TORQUE SWITCH INTERRUPTS CONTROL CIRCUIT IFMECHANICAL OVERLOAD OCCURS DURING CLOSING CYCLE.
18
17
REVISION
LIMITORQUE CORPORATION
WIRING DIAGRAMTITLE
DRAWING NO.
DATE
1ST ORDER NO.
REDRAWN
APPROVED
CHECKED
DRAWN
DATEDESCRIPTIONNO.
2.1
CLOSE CONTACTOPEN CONTACT
10
8 Standard Wiring Diagrams
![Page 50: USER INSTRUCTIONS - Flowserve · 2020-01-02 · If damaged, immediately report the damage to the transport company. 2. Record the actuator nameplate information for future reference,](https://reader033.vdocuments.us/reader033/viewer/2022043014/5fb1efe04f8fdd31bc779821/html5/thumbnails/50.jpg)
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
50
Figure 8.2 – Wiring Diagram – Integral Controls
7 3
(7)
(7C)
(3)
(3C)
TB2-
2
R G
3-6
3-3
(18)
(18C
)
(17)
(17C
)
(5)
(5C)
(1)
(1C)
(8)
(8C)
8
1
LOCA
LRE
MOT
E
O C
OC
47 57
CL2
2119
CL1
CL1
CL1
CL1
C C CO O O
T1 T2 T3
L1 L2 L3
4
5(4
)(4
C)
1817
OPEN
CLOS
E
(17)
(17C
)(1
8)(1
8C)
1 10 1374
11
14852
19633 6
2 5
1 4
1 2 3 4
1 2 3 4
11 2
2
1 12
34
56
78
910
23
45
67
89
10
3 6 9
2 5 8
11
1 4 7 10
TB2-
8
TH O
L
TO C
USTO
MER
'SEQ
UIPM
ENT
1 1
SS OFF
O C R G
(H3)
(H2)
(H4)
TORQ
UE S
WIT
CH (T
QCO
MP
HTR
CL2
CL2
TB2-
1
TB1-
9 (2C)
(2)
(6)
(6C)
26
TB1-
3TB
1-1
TB1-
2
1 2 3 4 TQ SW
PIN
NUM
BER
CONN
ECTO
RNU
MBE
R
CONN
ECTO
R
12 12
TB2-
12
SYM
BOL
DESC
RIPT
ION
TB2-
11TB
2-12
TERM
INAL
POI
NT
TERM
INAL
STR
IP N
UMBE
R
TERM
INAL
POI
NTNU
MBE
R
INTE
GRAL
P.C
. BOA
RD
POT
(OPT
IONA
L)
POT
(OPT
IONA
L)
TO C
USTO
MER
'S E
QUIP
MEN
T
3
12
34
56
7
7-1
7-2
7-3
7-1
7-2
7-3
1-4
1-3
1-1-
2
1-4
1-1-
1-
2-7
2-10
2-8
2-
2-4
2-5
2-1
2-2
2-3
2-6
2-12
2-13
2-14
2-15
4-8
4-9
4-7
4-1
4-2
5-1
5-2
6-1
6-2
6-6-
2
ELEC
TRIC
AL C
OMPA
RTM
ENT
B2
61
70
12
00
52
00
00
00
FOR
REM
OTE
INDI
CATI
ON(W
HEN
REQU
IRED
)
TB1
TB2
TB1
TB2
J1
J1-C
ONNE
CTOR
FOR
MOD
UTRO
NIC
20 U
NITS
4-4
4-4
19
1
1-2
JUM
PER
SEE
NOTE
#5
5-4
5-3
3-8
3-9
3-7
98
7
CL2
CL1
STAN
DARD
K.Ho
rton
3-7
3-7
3-7
12-0
2-87
3
TB1-
10
TB1-
8
INCO
MIN
G PO
WER
16-4
76-1
012-
3 A
AKE
H1-
20-8
8RE
V TO
15
PT S
TRIP
& C
ORR
POT
NO'S
TH.O
L
MOT
OR
GEAR
LIM
IT S
WIT
CH (G
L SW
)
MTR
HTR
L1 L2 L3 L3 L2 L1
475747 57O C
L2L1
2119
PB1
OPEN
PB3
CLOS
EPB
2ST
OP
19
LOCA
L
21
REM
OTE
19
3-3
3-2
3-5
3-6
3- 3-4
SW S
TATI
ON (S
W S
TAT)
3-8
3-9
3-7
3-7
L1L2
L3
FUSE
CPT
(H1)
(X2)
(X1)(H3)
(H2)
(H4)
T1 T2 T3
T1 T2 T3
INTE
GRAL
CON
TROL
(INT
G. C
ONT)
5-5-
25-
35-
4T1 T2 T3
5-3
5-1
5-2
5-4
OFF
SS
GR
BLAC
K
BLUE
RED
GREE
NW
HITE
BROW
NPI
NKGR
AY
PURP
LE
PURP
LE
ORAN
GE
YELL
OW
BRN
WHI
TE
BLAC
K
BLUE
YELL
OW
ORAN
GE
BROW
N PINK
GRAY
RED
GREE
N
WHI
TE
PURP
LE
PIN
NUM
BER
WIR
ECO
LOR
SW S
TATI
ON
4-1
BLU
E4-
2 Y
ELLO
W4-
3 P
URPL
E4-
4 B
LACK
4-5
ORA
NGE
4-6
BRO
WN
4-7
WHI
TE4-
8 R
ED4-
9 G
REEN
4-10
PIN
K4-
11 G
RAY
4-12
RED
/WHT
TQ SWGL SW
INTG
CONT
SW STAT
MTR
HTR
TH
OL
COM
PHT
RPO
T
+
MOT
OR
FUSE
CPT
(H1)
(X2)
(X1)
CL1
. . . . . . . . . . . . . . . .
..
..
.
BY-P
ASS
CIR
SPAR
EIN
D LI
GHT
OPEN
LIM
ITBY
-PAS
S CI
RSP
ARE
IND
LIGH
TCL
OSE
LIM
ITSP
ARE
SPAR
ESP
ARE
SPAR
ESP
ARE
SPAR
ESP
ARE
SPAR
E
FULL
YOP
ENA
BFU
LLY
CLOS
ED
VALV
E SH
OWN
IN F
ULL
OPEN
POS
ITIO
N
P R
S12
-16-
88
12-1
6-88
JD
3-2
3-5
3-4
TB2-
7
TB2-
6
OPEN
CLOS
E
O C
STOP
COM
MO
N
REM
OTE
REM
OTE
TB2-
5
TB2-
4
3-1
TB2-
9
TB2-
10
4-5
4-6
4-10
4-6
4-6
4-3
4-11
4-11
11PB
1OP
EN
PB2
STOP
PB3
CLOS
E
REVI
SION
LIM
ITOR
QUE
CORP
ORAT
ION
WIR
ING
DIAG
RAM
TITL
E
DRAW
ING
NO.
DATE
1ST
ORDE
R NO
.
REDR
AWN
APPR
OVED
CHEC
KED
DRAW
N
DATE
DESC
RIPT
ION
NO.
REVI
SION
NO.
LEGE
ND
2.1.CL
OSE
CONT
ACT
OPEN
CON
TACT
NOTE
S
MTR
HTR
COM
P HT
R
(4)
(4C)
8(8C) (8)
(1)
(1C)
(2)
(2C)
(3)
(3C)
(5)
5(5C)6(6C)(7)
7(7C)
CLOS
E RO
TOR
OPEN
ROT
OR
(9)9
(9C)
(10)10
(10C
)
(11)1
(11C
)
(12)12
(12C
)
(13)13(13C
)
(14)14(14C
)
(15)15(1
5C)
(16)16(16C
)
INT.
1 RO
TOR
INT.
2 RO
TOR
4 3 2 1
(6)
2-5
2-4
2- 2-8
2- 2-13
2-3
2-2
2-2
2-1
2-10
2-7
2-15
2-14
2-6
2-5
3.RO
TORS
INT.
1 &
INT.
2 CA
N BE
SET
AT
VALV
EPO
SITI
ON F
ULL
OPEN
, FUL
L CL
OSED
OR
ANY
POSI
TION
IN B
ETW
EEN
AS IN
DICA
TED
BYPO
INT
A AN
D B.
4.TR
ANSF
ORM
ER C
ONNE
CTIO
N FO
R HI
GH V
OLTA
GECO
NNEC
T H3
TO
H2, H
1 TO
L1
& H
4 TO
L2.
FOR
LOW
VOL
TAGE
CON
NECT
H1
& H
3 TO
L1
AND
H2 &
H4
TO L
2.5.
ADD
JUM
PER
ON L
S#8
BETW
EEN
TERM
INAL
S 8
& 8
C FO
R TO
RQUE
SEA
TING
VAL
VES.
O-OP
EN C
ONTA
CTC-
CLOS
E CO
NTAC
T-O
PENI
NG C
OIL
-CLO
SING
COI
LCP
T-CO
NTRO
L PO
WER
TRA
NSFO
RMER
+-M
ECHA
NICA
L IN
TERL
OCK
TH. O
L.-T
HERM
AL O
VERL
OAD
CONT
ACTS
-RED
INDI
CATI
NG L
IGHT
-GRE
EN IN
DICA
TING
LIG
HTSS
-SEL
ECTO
R SW
ITCH
(LOC
AL-O
FF-R
EMOT
E)PB
1-OP
EN P
USHB
UTTO
NPB
2-ST
OP P
USHB
UTTO
NPB
3-CL
OSE
PUSH
BUTT
ONCO
MP
HTR-
COM
PART
MEN
T HE
ATE
RM
TR H
TR-M
OTOR
HEA
TER
POT-
SLID
EWIR
E TR
ANSM
ITTE
R(S
EE C
ERTI
FICA
TION
SHE
ET IF
REQ
UIRE
D)
LIM
IT S
WIT
CH C
ONTA
CT D
EVEL
OPM
ENT
VALV
E PO
SITI
ONRO
TOR
OPEN
CLOS
E
INT.
1
INT.
2
FUNC
TION
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
CONTACT
OPEN
ING
TORQ
UE S
WIT
CH IN
TERR
UPTS
CON
TROL
CIR
CUIT
IFM
ECHA
NICA
L OV
ERLO
AD O
CCUR
S DU
RING
OPE
NING
CYC
LE.
CLOS
ING
TORQ
UE S
WIT
CH IN
TERR
UPTS
CON
TROL
CIR
CUIT
IFM
ECHA
NICA
L OV
ERLO
AD O
CCUR
S DU
RING
CLO
SING
CYC
LE.
1817
![Page 51: USER INSTRUCTIONS - Flowserve · 2020-01-02 · If damaged, immediately report the damage to the transport company. 2. Record the actuator nameplate information for future reference,](https://reader033.vdocuments.us/reader033/viewer/2022043014/5fb1efe04f8fdd31bc779821/html5/thumbnails/51.jpg)
51
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
flowserve.com
Figure 8.3 – Wiring Diagram – NCU
WH
TBL
K
00
00
00
30
00
ELEC
TRIC
AL C
OMPA
RTM
ENT
TO C
USTO
MER
'SEQ
UIPM
ENT
10
51
61
A
GEAR
LIM
IT S
WIT
CHTH
OL
T3T2T1
MOT
OR
MTR
HTR
H1 H2P1 P2
COM
P HT
R
00
MOT
OR
(18
(18C
)
18
(4)
(4C)
(5)
(5C)
(8)
(8C)
(17C
)(1
7
(1C)
(1)
154 8
1
37
(7C)
(7)
(3)
(3C)
(7C)
(3C)
COM
P HT
R
MTR
HTR
TH O
L
THER
MAL
OVER
LOAD
CONT
ACTS
54 7
(H1)
6
(H2)
3 (T
3)
2 (T
2)
1 (T1
)
INDI
CATI
ON
OPEN
CIR
CUIT
CLOS
E CI
RCUI
T
HEAT
ERS
BY-P
ASS
CIR
IND
LIGH
TOP
EN L
IMIT
BY-P
ASS
CIR
IND
LIGH
TCL
OSE
LIM
ITSP
ARE
SPAR
ESP
ARE
SPAR
ESP
ARE
SPAR
ESP
ARE
SPAR
E
FULL
YOP
ENA
BFU
LLY
CLOS
ED
VALV
E SH
OWN
IN F
ULL
OPEN
POS
ITIO
N
LEGE
ND
2.1.CL
OSE
CONT
ACT
OPEN
CON
TACT
NOTE
S
SPAR
E
SPAR
E
3.RO
TORS
INT.1
& IN
T.2 C
AN B
E SE
T AT
VAL
VEPO
SITI
ON F
ULL
OPEN
, FUL
L CL
OSED
OR
ANY
POSI
TION
IN B
ETW
EEN
AS IN
DICA
TED
BYPO
INTS
A A
ND B
.
LIM
IT S
WIT
CH C
ONTA
CT D
EVEL
OPM
ENT
VALV
E PO
SITI
ONRO
TOR
OPEN
CLOS
E
INT.
1
INT.
2
FUNC
TIO
N
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
CONTACT
OPEN
ING
TORQ
UE S
WIT
CH IN
TERR
UPTS
CON
TROL
CIR
CUIT
IFM
ECHA
NICA
L OV
ERLO
AD O
CCUR
S DU
RING
OPE
NING
CYC
LE.
CLOS
ING
TORQ
UE S
WIT
CH IN
TERR
UPTS
CON
TROL
CIR
CUIT
IFM
ECHA
NICA
L OV
ERLO
AD O
CCUR
S DU
RING
CLO
SING
CYC
LE.
1817
AB
LIM
ITOR
QUE
CORP
ORAT
ION
NO C
ONTR
OLS
UNIT
DIA
GRAM
POTE
NTIO
MET
ER (O
PTIO
NAL)
TITL
E
DRAW
ING
NO.
1ST
ORDE
R NO
.AP
PROV
ED
CHEC
KED
DRAW
N
DATE
DESC
RIPT
ION
NO.
REV
17-4
99-0
009-
3 GSH
EET
1 1OF
DATE
DATE
DATE
JJJ
02/0
8/94
STAN
DARD
L-78
2 RE
V-A 4
/26/
93
87
54
32
1
MOT
ORGR
OUND
LUG
LIGH
TS
BUTT
ONS
AUX.
TERM
.
GRN
RED
WH
T
PUR
BRN
GRY
PNK
ORG
BLU
BLK
YEL
1 2 3 1 2 3 4 1 2 3 4
1 2W
HT
910
1112
13
CHAS
SIS
GROU
ND
PINK
GRY
ORG
BRN
PUR
WHT
BLK
POT
(OPT
IONA
L)
(CCW
)
(S)
(CW
)
6
LIM
IT S
WIT
CHES
(1)
(1C)
5
(5C)
(5)
(4)
(4C)(3)
(3C)(2)
(2C)
(8)8
(8C)7
(7C)
(6)6
(6C)
1 2 3 4
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(10)
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(16)16(16C
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(15)15(15C
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(14)14(14C
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5
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
52
Problem Check
Geared limit switch fails to stop valve travel.
A. Control wiring and motor reversing contactor.
B. Geared limit switch setting.
C. Setting rod to see that it has been backed off after each side of the switch has been set.
D. Remove limit switch and inspect for damaged or broken gear teeth.
Unable to operate actuator by motor.
A. Motor power and control circuits for supply and continuity.
B. Supply voltage vs.motor and controller nameplate rating. If O.K., then check motor amperage load.
C. For stalled motor. Shut off power and operate actuator by handwheel to move the valve.
Excessive handwheel effort.
A. Lubrication method and valve stem for damage.
B. If the valve packing gland is too tight.
C. If the valve is improperly lubricated.
D. If the stem nut is too tight on valve stem.
E. For faulty or damaged valve or parts.
9 Troubleshooting
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53
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
flowserve.com
To order parts or obtain further information about your Limitorque L120 valve actuators, contact your local Flowserve Limitorque distributor, sales office, or:
Flowserve Limitorque 5114 Woodall Road P.O. Box 11318 Lynchburg, VA 24506-1318
Phone (434) 528-4400 Fax (434) 845-9736
To find the nearest Limitorque distributor or sales office near you, go to www.limitorque.com
All inquiries or orders must be accompanied by the following information:
1. Actuator Size
2. Order Number
3. Serial Number
This information can be found on the Limitorque nameplate affixed to the actuator.
10 How to Order Parts
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Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
54
11 EC Declaration of Conformity
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55
Limitorque® L120-190 through L120-2000 FCD LMENIM1203-01-AQ – 05/15
flowserve.com
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flowserve.com
To find your local Flowserve Limitorque representative:
For more information visit www.limitorque.com or call 1 434 528 4400.
Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its intended function safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a wide variety of industrial service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation, and maintenance of Flowserve products. The purchaser/user should read and understand the Installation Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe use of Flowserve products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered certified or as a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice. Should any question arise concerning these provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide operations or offices.
© 2015 Flowserve Corporation, Irving, Texas, USA. Flowserve is a registered trademark of Flowserve Corporation.
Flowserve Corporation
United States Flowserve Limitorque 5114 Woodall Road P.O. Box 11318 Lynchburg, VA 24506-1318 Phone: 434-528-4400 Fax: 434-845-9736
England Flowserve Limitorque Euro House Abex Road Newbury Berkshire, RG14 5EY United Kingdom Phone: 44-1-635-46999 Fax: 44-1-635-36034
Singapore Limitorque Asia, Pte., Ltd. 12, Tuas Avenue 20 Singapore 638824 Phone: 65-6868-4628 Fax: 65-6862-4940
China Limitorque Beijing, Pte., Ltd. RM A1/A2 22/F, East Area, Hanwei Plaza No. 7 Guanghua Road, Chaoyang District Beijing 100004, Peoples Republic of China Phone: 86-10-5921-0606 Fax: 86-10-6561-2702
India Flowserve Limitorque Plot No. #4, 1 A, Road No. 8, EPIP Whitefield, Bangalore – 560066 Karnataka India Phone: 91-80-40146200 Fax: 91-80-28410286
Italy Flowserve Limitorque Fluid Power Systems Via Rio Vallone 17 20883 Mezzago MB Italy Phone: 39-039-620601 Fax: 39-039-62060 213
FCD LMENIM1203-01-AQ Printed in USA. May 2015