ALTA-ROBBINS

A427A-16B-76B

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G414A-12B-768 G427 A-16B-768

427 SeriesValve

Data Sheet

INFORMATION FOR ORDERING, IDENTIFICATION, INSPECTION AND MAINTENANCE

All Metal Functional Parts Are Stainless SteelNo Dynamic O-Ring SealsSolid One-Piece Stainless Steel Handle Pre-vents LooseningLow Operating and Shutoff TorqueExcellent Throttling CharacteristicsStatic Stem SealsExterior Acme Stem Threads Protected fromDust and DirtFor Panel Mounting - Easily Serviced fromFront of Panel Without Removal from LineFor Liquid and Gaseous Applications Re-quiring Leakproof Sealing In Operation fromVacuum to Either 6000 or 12000 PSI, Depend-ing on ModelBonnet Assembly May Also Be Used inRobbins 414 and 427 Series Valves

DIMENSIONS ARE :t .06

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TECHNICALDATA

ORDERING INFORMATION

Max. Oper. Pressure See Ordering Infor-mation Table4:1See TableZeroZeroSee Table316 Stainless Steel

Safety Factor:CV:External Leakage:Internal Leakage:Orifice Dia.Body Material:Bonnet & StemMaterial: 303 Stainless SteelO-Ring Material: Buna-N (Standard)Seat Material:' TeflonPort Size: See Table

Female SAE Straight Thread O-RingBoss - Acceflls AND, MS, or SAEStraightThread Tube Fittings

Weight: See TableOper. Temperature: -40°F to + 250°FMax. Handle Torque: 35 IN. LBS.Dimensions: See Drawings Above

Approximately 7 Handle Turns to Open

Body Average Weight PressureModel Number Ports Material Orifice CV Ibs. PSI

A414A-8B-768 SAE Vi' 316 SS .437 2.5 5.10 12000

Angle A414A-8C-768 MC240-8 316 SS .437 2.5 5.10 12000A414A-12B-768 SAE3/4" 316 SS .437 3.0 5.10 12000

Valve A427A-12B-768 SAE 3/4" 316 SS .844 9.0 5.13 6000A427A-16B-768 SAE I" 316 SS .844 9.5 5.13 6000A427A-16C-768 MC240-16 316 SS .844 9.5 5.13 6000

G414A-8T-768 MS33649-8 316 SS .437 1.5 5.10 12000

GlobeG414A-8B-768 SAE'I2" 316 SS .437 1.5 5.10 12000G414A-12B-768 SAE 3/4" 316 SS .437 2.0 5.10 12000

Valve G414A-12C-768 MC240-12 316 SS .437 2.0 5.10 12000G427A-8T-768 MS33649-8 316 SS .844 2.5 7.02 6000G427A-12B-768 SAE 3/4" 316 SS .844 5.0 7.02 6000G427A-12T-768 MS33649-12 316 SS .844 5.0 7.02 6000G427A-16B-768 SAE I" 316 SS .844 6.0 7.02 6000G427A-16T-768 MS33649-16 316 SS .844 6.0 7.02 6000

Note: -768 Indicates 316SS material for all wetted parts.

MAINTENANCEAs all functional parts of the valve are contained in the Bonnet Assembly, an installed valve maybe quickly restored to service without removal from the line by replacing the Bonnet Assemblyas a unit:

1. Loosen Locknut (S).2. Unscrew Bonnet Assembly.3. Insert new or rebuilt Bonnet Assembly in Body and tighten to 150 inch pounds torque.

CAUTION: Valve Stem (V) should be unscrewed to approximately half open positionwhen installing Bonnet Assembly.

4. Tighten Locknut to 300 inch pounds torque.

If complete disassembly of the valve is required for inspection and replacement of worn ports,proceed as follows:

DISASSEMBLY

1. Open Valve fully.2. Unscrew Locknut (A) and Adjustment Screw (B).3. Turn Handle (J) down to expose Bearing (C), Spacer (D), and Nuts (E).4. RemoveBearing (C) and Spacer (D).5. Unscrew Two'Nuts (E)and remove.6. RemoveHandle from Stem (V).7. RemoveSpacer (F), Bearing (G), and Spacer (H) from Handle.8. RemoveStemSeal Retainer (M).9. RemoveBonnet Locknut (S).

10. RemoveBonnet Assembly from Body.11. Apply hand pressure on handle end of Stem (V) to eject Lower Seat [Z}, Port Ring (Y), and

Upper Seat (X) from Bonnet.12. RemoveStem (V) from Bonnet (T).13. PushStem back through Bonnet and remove StemSeal (N), a-ring (P),Washer (Q), and

Spring (R).

ASSEMBLY

1. Apply a light film or Kel-P # 10 ail an Stem (V) and insert stem in Bonnet (T] fully.2. Lubricate all a-rings with Kel-F # 10 oil.3. Put one a-ring (W) on Upper Seat (X) and install in Bonnet, making sure on 414A Valves

that heavy shoulder of Seat is toward Handle end.4. Insert Port Ring (Y) in Bonnet. Be sure flow holes in Port Ring are in line with flow holes in

Bonnet.5. Put one a-ring (W) on Lower Seat (l) and install in Bonnet, with large toper of Seat toward

Handle end.6. Puttwo a-rings (U) on Bonnet.7. Apply light film of Kel-P #10 oil on outside surface of Bonnet and screw Bonnet into Body

using 150 inch pounds of torque to tighten.8. Install Locknut (S)on Bonnet (T] and tighten Locknut to 300 inch pounds torque.

9. Install Spring (R)and Washer (Q) in Bonnet, with beveled edge of washer toward handle.10. Apply one drop of Kel-F #10 oil to StemSeal; then install a-ring (P)and StemSeal (N)

pushing both below threads in Bonnet.11. Lubricate Retainer (M) with Kel-P #10 oil and install in Bonnet. Tighten to 35 inch pounds

torque.12. Lubricate Felt Wiper (K) with Kel-F #10 oil; then insert into Cap (L) and install n Handle (J).13. Screw Handle on Bonnet fully.14. Install Spacer (H), Bearing (G), and Spacer (F) in Handle.15. Screw two Nuts (E) on Stem.Stemshould be 3/32" to 1116" below top of top nut.16. Lock two Nuts (#) against each other using 30 inch pounds torque.17. Turn handle counterclockwise as for as possible.18. Install Spacer (D), Bearing (C). and Adjustment Screw (B) in Handle.19. Torque Adjustment Screw (B) to about 300 inch pounds torque.20. Install Locknut (A) and torque to 100 inch pounds while holding Adjustment Screw (B) with

screwdriver to prevent turning while tightening Locknut.

414APART MODEL

NAME NO.

LOCKNUT 149ADJUSTMENTSCREW 150BEARING 147 cSPACER 146 0

NUT 145, E

NUT 145, E

SPACER 144. F

BEARING 1431 6

SPACER 142HANDLE 148

WIPER 70

CAP 69RETAINER 65

STEMSEAL 16

a-RING 5008-51WASHER 13

SPRING 11001

LOCKNUT 64

BONNET 62

a-RING 5019-56

a-RING 5019-56

STEM 151

a-RING SOlS-51SEAT,UPPER 14-3-11PORT RING 17

a-RING SOlS-51SEAT,LOWER 14-4-11

'BONNET ASSEMBLYA251

427AMODEL PART

NO. NAME

149 LOCKNUT150 ADJUST-

MENT SCREW147 8EARING146 SPACERr>.145 NUT145 NUT144 SPACER143 BEARING142 SPACER148 HANDLE

70

6965

WIPER

CAPRETAINER

16 STEAM SEAL

5008-51 a-RING13 WASHER

11001 SPRING

84 LOCKNUT

BONNET

5026-56 a-RING

5026-56 a-RING

v 295 STEM

5022-51 a-RING82-2-11 SEAT,

UPPER83 PORT RING

~z ~ 5022-51 O·RING®---.......... --.. __ -~----~ Z 82-1-11 SEAT,, LOWER

'BONNET ASSEMBLYA252WIPERASSEMBLYA92

(Wiper K - Cap L)

'NOTE: locknu! (S) is no! included in price of Bonne! Assembly.

-/ ALTA-ROBBINS110 South 1200 WestLindon, Utah 84042Phone (801) 785-1114Fax (801) 785-4333

WARRANTY:Alta-Robbins warrants to the purchaser of it's products that any part thereof which proves to bedefective in material or workmanship within one year from the date of original purchase for use will be replacedfree of charge. This warranty does not apply to damages resulting from accidents, alterations, misuse, or abuse.

NOTICE: The designs, data, and/or processes set forth hereon or in connection herewith are directly related toproducts of Alta-Robbins.