national sw centrifugal-installation, care and operation

7/27/2019 National Sw Centrifugal-Installation, Care and Operation

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S & W CentrifugalPumpsInstallation, Care andOperation Manual

Sales / Technical Informa

USA Tollfree: 1-800-800-4Phone: 1 (713) 462-4110Fax: 1 (713) 462-3152

Internet: http://www.natoil.

Bulletin No.M201-2

P.O. Box 4638 Houston, Texas 77210-4638

ISSUE:


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INSTALLATION, CARE AND OPERATION MANUAL S & W CENTRIFUGAL PUMPS

SALES/TECHNICAL INFORMATION 1 (800) 800-4110 www.natoil.com

Installation, Care and Operation Manual

S & W CENTRIFUGAL PUMPSTABLE OF CONTENTS

INTRODUCTION.............................................................................................................................1-1PUMP ASSEMBLY MOUNTING..................................................................................................1-1

INSTALLATION AND STARTUP OF PUMP PACKAGES..............................................................1-1GENERAL INSTRUCTIONS........................................................................................................1-1INSTALLATION...........................................................................................................................1-1COUPLING ALIGNMENT ............................................................................................................1-1PIPING (GENERAL) ....................................................................................................................1-2PIPING (DISCHARGE)................................................................................................................1-3

PREPARATION FOR OPERATION................................................................................................1-3CHECK ROTATION.....................................................................................................................1-3LUBRICATION................................................................................................................................1-4

PUMP SPEED LIMITATIONS......................................................................................................1-4GREASE LUBRICATION.............................................................................................................1-4OIL LUBRICATED PUMP............................................................................................................1-4PRIMING.....................................................................................................................................1-5PUMP RECORDS .......................................................................................................................1-5LOOSEN PACKING ON STARTUP.............................................................................................1-5TROUBLESHOOTING PROCEDURES.......................................................................................1-5

EXCESSIVE PACKING LEAKING AND RAPID PACKING FAILURE......................................1-5PACKING BURNED ................................................................................................................1-5

BEARING FAILURES.....................................................................................................................1-6IDENTIFICATION OF BEARING FAILURE ....................................................................................1-6

ABNORMAL TEMPERATURE RISE............................................................................................1-6GREASE APPEARANCE ............................................................................................................1-6NOISE .........................................................................................................................................1-6BEARING DISCOLORATION......................................................................................................1-6RETAINER FAILURE ..................................................................................................................1-6CAUSE........................................................................................................................................1-7

DIRTY LUBRICATION.............................................................................................................1-7TOO MUCH LUBRICANT........................................................................................................1-7WRONG KIND OF LUBRICANT..............................................................................................1-7MISALIGNMENT BETWEEN PUMP AND DRIVER.................................................................1-7

RE-PACKING THE STUFFING BOX..............................................................................................1-7PACKING APPEARANCE...........................................................................................................1-7CORRECT INSTALLATION OF PACKING..................................................................................1-8

ADJUSTING THE PACKING .......................................................................................................1-8LUBRICATION AND COOLING OF PACKING WITH WATER ....................................................1-8GREASE LUBRICATION OF PACKING......................................................................................1-8INSTALLATION OF REPLACEABLE PARTS..............................................................................1-8OPERATING CONDITIONS......................................................................................................1-10LUBRICATION ..........................................................................................................................1-10

LONG TERM PUMP AND MOTOR STORAGE ............................................................................1-11


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S & W CENTRIFUGAL PUMPS INSTALLATION, CARE AND OPERATION MANUAL

www.natoil.com SALES/TECHNICAL INFORMATION 1 (800) 800-4110

RECOMMENDED LUBRICANTS................................................................................................. 1-11CUSTOMER SERVICE................................................................................................................. 1-12

SALES/TECHNICAL INFORMATION........................................................................................ 1-12

TABLE OF FIGURES

Figure 1-1. Measuring Offset Misalignment..................................................................................... 1-2Figure 1-2. Measuring Angular Misalignment.................................................................................. 1-2

Figure 1-3. ...................................................................................................................................... 1-2Figure 1-4. ...................................................................................................................................... 1-2

TABLE OF TABLES

Table 1-1. Pump Speed Limitations ................................................................................................ 1-4Table 1-2. Recommended Lubricants ........................................................................................... 1-11


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S & W CENTRIFUGAL PUMPS

INTRODUCTION

PUMP ASSEMBLY MOUNTING

The National Oilwell Centrifugal Pump isshipped completely assembled and readyfor operation. The impeller has beencarefully lined up, and the shaft bearingshave been locked in place to provide properclearance within the housing. The shaftshould be rotated by hand beforeinstallation to make sure the impellerclearance has not been disturbed duringshipment. If the impeller scrapes, it must bereset. The Pump may be mounted on a castiron or steel plate and may or may not beconnected to the driver. The base platemust be well supported on a solidfoundation, leveled, and firmly placed.External piping should be supportedindependently to align with suction anddischarge flanges of the pump, so as toavoid transmitting pipe strains to the pump.Complete dimensions are given in theinstallation plan furnished with each pump.

INSTALLATION ANDSTARTUP OF PUMPPACKAGES

GENERAL INSTRUCTIONS

Operate the pump only in the performancerange for which it was designed. Whenoperating in drilling mud, prevent packing

drippage from clogging the drip pan. Thebuild-up can allow mud to go around theslinger and front seal into the bearings.

Adjust the packing so that a small amountof leakage remains for lubrication andcooling.

INSTALLATION

The pump should be located near the liquidsource so that the suction line may be short

and direct. The pump should be locatedbelow the level of the liquid to eliminate thenecessity of priming.

COUPLING ALIGNMENT

Good service life of the pump and driverdepends upon good alignment through theflexible coupling. If the electric motor wasmounted by the manufacturer, the pumpand motor were in alignment when shipped

The alignment between the driver andpump should be inspected after installationto ensure that transportation or otherhandling has not caused misalignment ofthe unit. Poor alignment may cause failureof the coupling, pump, or motor bearings, orof either shaft.

The recommended procedure for couplingalignment is by the use of a dial indicator,as illustrated in Figure 1-1 and Figure 1-2

The dial indicator is attached to onecoupling, half with the indicator buttonresting on the O.D. of the other couplinghalf to measure offset misalignment. Tomeasure angular misalignment, theindicator is positioned so that the buttonsrest on the face, near the O.D. of the othercoupling half. Rotate the shaft and diaindicator one full revolution while the othershaft re-mains stationary and note the TI.RUnless otherwise specified by the coupling

manufacturer, offset misalignment shouldbe limited to.005 inches TI.R. Adjustalignment by loosening driver or pumpmounting bolts and retightening orshimming as required.


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1/64 Max."

COUPLING ALIGNMENT (Continued)

Figure 1-1. Measuring OffsetMisalignment

Figure 1-2. Measuring AngularMisalignment

In areas where a dial indicator arrangementis not available, an adequate job ofalignment can be done with a straight edge.

This method is especially useful if thecoupling used contains an all rubber driveelement, which can be used with up to 5times the misalignment of metal drivecouplings.

To check offset misalignment, lay thestraight edge in line with the shafts on theOD's of the coupling halves. There shouldbe no gaps under the straight edge. Checktwo locations 90 apart. Angular

misalignment can be checked by measuringthe gap between coupling half faces. Thereshould be no more than a 1/64" gap underthe straight edge or 1/64" variation in thegap between coupling halves.

See Figure 1-3 and Figure 1-4.

Figure 1-3.

Figure 1-4.

PIPING (GENERAL)

Piping should be anchored independently ofthe pump and as near to it as possible. Pipecompanion flanges should line up naturallywith pump flanges. Do not draw the pipe tothe pump with flange bolts.

Piping (Suction) Properly selected andinstalled suction piping is extremelyimportant to eliminate vibration andcavitation in the pump. Vibration can causepacking problems, or undo bearing loads.The suction should be equal to or largerthan the pump suction.

A positive shut-off valve of a type to causeminimum turbulence should be installed inthe suction line to permit the closing of theline and removal of the pump for inspectionand maintenance.


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THE CAPACITY OF ACENTRIFUGAL SHOULDNEVER BE ADJUSTED BYTHROTTLING THE SUCTION.

The suction line should have a straightsection into the pump of a length equivalentto at least two times the diameter of thesuction line.

For temporary hook-up, where flexible hoseis used, a non-collapsing hose is essentialsince the suction line is often belowatmospheric pressure. A collapsing suctionline will result in below design or completeloss of flow.

PIPING (DISCHARGE)

A positive shut-off valve should be locatedin the discharge piping to permit inspectionand maintenance of the pump.

All piping should be independentlysupported and accurately aligned.

The pump must not support the weight ofthe pipe or compensate for misalignment.

If operating conditions are not known withsufficient accuracy, it will be necessary toprovide a throttle valve in the dischargepiping to ensure that the pump operates atthe design point.

If the pump is connected to a pressurizedsystem, it is important to install a checkvalve between the pump discharge and thethrottling valve. The check valve willprevent back flow through the pump.

PREPARATION FOROPERATION

CHECK ROTATION

Most pumps purchased are clockwise whenviewed from coupling end.

The correct rotation can be found by anarrow on the casing.

It is very important that the pump is notstarted up, and then go and see if the pumpis turning the correct rotation. The packingor mechanical seal can run dry and bedestroyed.

The best way to check rotation is todisconnect the coupling before testingrotation, but it can be checked withoutdisconnecting the coupling. One personshould be at the pump watching the shaftwhile the second person pushes the startbutton on the starter and immediatelypushes the stop button so the shaft barelyturns over.


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LUBRICATION

PUMP SPEED LIMITATIONS

Refer to Table 1-1.

Table 1-1. Pump Speed Limitations

TYPE OIL GREASE

S 3500 2400

W 3500 2400

GREASE LUBRICATION

Most pump bearings are pre-lubricated withgrease from the factory, and in moderatespeed, low temperature application may notneed lubrication throughout the life of thepump. Plugs are installed where the greasefittings are to go. In heavy loads and hotapplications, the bearings should be re-lubricated at regular intervals for maximumbearing life. The bearings are lubricatedwith Chevron SRJ-2 grease at the factory.When re-lubricating, the Chevron grease

would be the best choice since mixinggreases sometimes causes incompatibilityproblems. The other premium bearinggreases are Exxon Unirex N2, ChevronPolyurea EP 2, Texaco Marfak Multi-Purpose 2, Shell Mp2, and American OilCompany's Rycon Premium 2 EP.

When using the five premium bearinggreases listed above or their equivalent,five shots of grease with a standard sized

hand operated grease gun, in each bearingevery 2-3 months will be sufficient in atwenty-four hour operation. Reduce forlesser operation. The pump bearingsshould be lubricated about on the sameschedule as the motor bearings.

OIL LUBRICATED PUMP

CAUTION: IF THE PUMP ISSHIPPED WITH AN OILER ITSHOULD BE OPERATED ONOIL.

NOTE: Automatic Oilers are set atthe factory to the lowest position.

This setting will place the oil level justbelow the center of the bottom ball ofthe bearing when the housing is level.Higher levels may cause churning andoverheating of the bearings; lower levelsmay provide insufficient lubrication andpromote rapid wear. The correct oil levelwill be visible at the center of the sightoil gauge.

CAUTION: STANDARD PUMPSARE SHIPPED WITH EMPTYOIL RESERVOIRS. OIL MUSTBE ADDED BEFORE

OPERATING THE PUMP.

Attach the oiler to the bearing housing, fillthe bottle with oil and place it in position.Refill the bottle until oil remains visible inthe bottle.

CAUTION: OIL SHOULD NOTBE ADDED TO THERESERVOIR EXCEPTTHROUGH THE OILER

BOTTLE.

A good grade of SAE 1OW30 oil may beused. The air vent should be kept clean toprevent pressure build-up because ofnormal heating that occurs in operation. ATrico optomatic oiler No. EB-64 with a 4 oz.capacity bottle is used. The correct bottlemust be used with the corresponding oilerbody.


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PRIMING

Be sure the pump has fluid in its casingbefore running. If the pump is operatedwithout fluid, the mechanical seal orpacking can be destroyed in one minute.

Vent air from the suction line and fill withliquid. Start pump with discharge valvecracked open. After discharge pressurestabilizes, gradually open discharge valveto required position. If flow is lost, closedischarge valve and wait a few seconds fordischarge press-sure to build.

CAUTION: DO NOT RUN THEPUMP WITH SUCTION VALVECLOSED ANYTIME AND WITHDISCHARGE VALVES CLOSED

ONLY FOR SHORT PERIODS OF THE.

The energy going into the pump heats thefluid in the casing. If the pump needs tooperate shut in some of the time, be sure tohave a small line (" or ") back to thesuction tank between the discharge valveand pump for cooling.

PUMP RECORDS

Maintain data cards or pump recordswhenever possible. This will pro-vide readyaccess to information for ordering spareparts, and for evaluating pump andmechanical seal performance.

Information to be included on these recordsshould be:

1. Pump size

2. Pump model number, impeller diameter,material of construction

3. Mechanical seal manufacturer, type,code, and drawing number

4. Motor horsepower and speed ofoperation

5. Service conditions

6. Frequency of operation

7. Record of maintenance, including partsusage and general condition of pump

8. Nomenclature and part number ofreplacement items

LOOSEN PACKING ON STARTUP

The gland bolt nut should be onlyfinger tight.

New packing will expand faster with heathan older packing. Therefore, new packingmust be adjusted more slowly than oldpacking: Too tight and it will not leak. Withno cooling it will burn and be no good forsealing.

TROUBLESHOOTINGPROCEDURES

EXCESSIVE PACKING LEAKING ANDRAPID PACKING FAILURE

Where excessive packing leakage andrapid packing failure occurs, the shaft orshaft sleeve may be worn out. Remove thepacking. Slide a wire, with a short section ofthe tip bent 90 into the stuffing box. Runthe stylus tip of the wire along the shaft. Ifdeep grooves are noted, the shaft or shaftsleeve must be replaced. Excessivetightening of the packing will cause rapidshaft failure.

PACKING BURNED

If the packing is burned and hard whenremoved, it has been overtightened atsome time and the lack of leakage causedthe packing to burn. Once packing hasburned and is no longer and soft andpliable, it will not seal properly. Initiaovertightening and attempting to runpacking without leakage will cause thepacking to burn.


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BEARING FAILURES

Note: Except for cavitationproblems, bearing failure is

greatest cause of increased pumpoperating.

CAUTION: IF YOU CONTINUETO RUN A PUMP WHENBEARING FAILURES OCCUR,THERE IS AN EXCELLENT

CHANCE THE WHOLE PUMP MAY BEDESTROYED. THEREFORE IT IS VERYIMPORTANT TO CHANGE THEBEARINGS WHEN FAILURE STARTS. IF

YOU WAIT FOR COMPLETE FAILURE,OTHER FLUID END PARTS WILL BE

DAMAGED.

Bearing failure is more often caused bylubrication failure than by normal bearingwear.

IDENTIFICATION OF BEARINGFAILURE

ABNORMAL TEMPERATURE RISE

The first indication of lubricant and bearingfailure is a rapid rise from normal operatingtemperature. You can not hold your handvery long on unsatisfactory temperatures. Ifyou can hold your hand on the bearinghousing about 5 seconds, the temperatureis about 160F (suitable for most pumps).

IF YOU CAN NOT HOLD YOURHAND ON THE BEARING

HOUSING FOR 5 SECONDS ORIF THE BEARING HOUSING IS

SO HOT YOU DO NOT WANT TO PUTYOUR HAND ON IT YOU PROBABLYHAVE LUBRICANT AND BEARINGFAILURE.

GREASE APPEARANCE

If the grease is stiff or caked and changedin color, it indicates lubrication failure. Theoriginal color will usually turn a dark shadeor jet black.

The grease will have an odor of burntpetroleum oil. Lubrication will be lost as aresult of lack of oil.

Note: In cases of lithium basegreases the residue appears like a

glossy brittle varnish, which will shatterwhen probed with a sharp instrument.

Grease is a mixture of oil and usually soap.When a pump or other equipment sits along time without rotating the oil separatesand runs out of the bearing housing. It maylook like grease is still in the bearing, but itwill not have any lubrication properties.

NOISE

Lack of lubrication is soon accompanied bya whistling noise, coupled with the rise intemperature. If not corrected, the bearing

temperature will continue to rise and theintense heating will reduce the bearinghardness.

BEARING DISCOLORATION

A brownish or bluish discoloration of theraces and balls indicates that the bearingoperating temperature was excessivelyhigh, to the extent that the bearing lost itsphysical properties and was no longer

operable.

RETAINER FAILURE

The bearing part that first indicates distressin lubrication failures is usually the retainer,where the greatest amount of rubbingaction takes place.


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CAUSE

DIRTY LUBRICATION

Contaminants found in lubricants often actas an abrasive compound, which will lap or

polish ball and race surfaces, increasing theprobability of early failure. Always be sureyou use good clean lubricant from a tubeand NOT from an open bucket.

TOO MUCH LUBRICANT

Note: A very common error in themaintenance of machinery is the

tendency to overlubricate. If the bearingreservoir is kept constantly full ofgrease, the friction heat developedwithin the lubricant can not get out andwill cause its rapid deterioration.

WRONG KIND OF LUBRICANT

After experimentation with many types oflubricants, the equipment manufacturerrecommends those that he feels will provideideal lubrication life under given operatingconditions. In as far as availability allows,you should use the same lubricant or itsequivalent.

CAUTION: MANY GREASESARE INCOMPATIBLE AND,ALTHOUGH COMPLETELY AD-EQUATE WHEN USED

INDIVIDUALLY, MAY PROVEUNSATISFACTORY WHEN MIXED.

MISALIGNMENT BETWEEN PUMP ANDDRIVER

A MAJOR CAUSE OF BEARINGFAILURES IS MISALIGNMENTALIGNMENT BETWEEN THEPUMP AND MOTOR SHOULD

ALWAYS BE CHECKED AFTERSHIPMENT AND PERIODICALLYRECHECKED.

RE-PACKING THE STUFFINGBOX

MOST EARLY PACKINGFAILURES ARE CAUSED BYOVERTIGHTENING OR POOR

INSTALLATION.

PACKING APPEARANCE

If the packing being removed is hard andbrittle, it has been run dry sometime duringits life. This is often done in the first hour ofservice. The packing has more ability togrow with heat during its early life. Even ifthe packing is adjusted just right beforestarting the pump, in the first few minutes

the packing will grow with heat and becomeover-tight. It then will run drop tight andburn the packing.

ONCE PACKING IS BURNED ITWILL NEVER SEAL RIGHTAGAIN.

On new packing, let it leak more in the firstfew hours, then adjust it to 10-12 drops perminute.


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CORRECT INSTALLATION OFPACKING

Make sure the box is clean of all oldpacking and the plastic lantern ring. Bend awire and pull it down the shaft or shaft

sleeve to be sure it is smooth for goodpacking life.

Place the first three rings of packing in thefront of the box with the splits alternated.The first split to be down, the second splitup, and the third split down. Then insert thelantern ring and compress this assemblyforward with the gland halves. Then installthe last two rings split up then split down.The object is to have the last split down so

leakage will drip down, not run along theshaft and maybe into the bearings.

After the packing has been installed, installthe packing gland and tighten hard tocompress the packing assembly. Back offthe gland bolts and re-tighten only fingertight.

ADJUSTING THE PACKING

Packing must have cooling;therefore it must leak.

When adjusting the packing always adjustonly one flat on the nut at a time, waiting forthe packing to heat before adjusting tighter.

THE PACKING MUST LEAK 10-12 DROPS PER MINUTE TOREMAIN COOL.

LUBRICATION AND COOLING OFPACKING WITH WATER

It is best to inject water into the lantern ringfrom an external source on drilling mud.This will keep most of the solids out of thepacking.

GREASE LUBRICATION OFPACKING

If water can not be used, the next bestaddition to the packing would be greasefrom an automatic spring-loaded grease

cup. This will help keep the packing sot.There is a visual indication when the cup nolonger has any grease. The stored greasenormally lasts a week or more if the packingis adjusted correctly.

INSTALLATION OFREPLACEABLE PARTS

The fluid end is so constructed that thoseparts subject to wear may be readily

replaced in the field. To replace the casing,wear plate, and impeller, the followingprocedure should be followed:

1. Stop pump and drain all lines leading tothe pump.

2. Loosen the bolts at the suction anddischarge flanges of the pump andmove pipe clear of pump casing andremove pump from system.

3. Separate the coupling, and loosen thecoupling half mounted on the pumpshaft.

4. Remove the casing stud nuts, and takeoff the casing.

5. Loosen the packing gland nuts, andswing the packing gland bolts clear ofthe packing gland. Remove the packing

gland halves.

6. Slide the water slinger along the shaftaway from the bearing cap.

7. Loosen bearing cap bolts on both endsand slide the bearing caps along theshaft. This will expose the bearings,


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which are locked to the shaft by aneccentric locking ring and set screw.

8. Loosen the bearing set screw and tapthe bearing locking ring a punch and asmall hammer so that it turns in thedirection opposite to the rotation of theshaft. When the bearing locking ring hasbeen turned 1/4 revolution, the bearingis freed from the shaft. Both bearingsmust be released. File off any upsetcaused by the collar set screw beforeattempting to slide shaft throughbearings.

9. Remove the impeller and shaft from thepedestal by pulling the impeller awayfrom the pedestal, thus freeing the

lantern ring, water slinger, bearing caps,bearings, and the couplings.

10. Remove the impeller nuts and washer.

11. Remove lantern ring and packing.

12. Remove wear plate by applyingpressure on the hub of the wear platethrough the shaft hole. The wear plate ispressed into the pedestal and forms the

bottom of the stuffing box.

13. The bearings may now be removed fromthe pedestal for inspection, by tappinglightly with a wooden or brass rod.

14. For 6X8 pump, press impeller off theshaft.

To reassemble the pump, theabove procedure is reversed.

New gaskets should be used throughout.Gaskets should be 1/16" thick and made ofa material suitable to the pump operatingcondition.

In establishing proper clearances on theimpeller, the following precautions arenecessary:

1. With impeller installed on shaft andrigidly keyed in place, insert the shaftthrough the shaft hole in the wear plateThe water slinger, bearings, capsgaskets, bearings, and coupling must bethreaded on the shaft in the properorder.

2. Put on the casing with the casing gaskeand tighten the casing stud nutsuniformly.

3. Push the shaft forward until the impellerhits the casing, mark the shaft, then pulit back until the impeller hits the wearplate and mark the shaft again.

4. The shaft should be set halfwaybetween these two marks, so that theclearance between the impeller and thecasing is approximately the same asthat between the impeller and the wearplate.

5. Make sure the rear bearing is seatedagainst the housing shoulder, and thenlock it to the shaft rotating the bearinglocking ring in the direction of pumprotation, and locking it with the setscrew.

Note:

6. The front bearing does not seat againstthe housing shoulder. This bearingshould be free to float along with theshaft to compensate for expansion andcontraction caused by temperaturechanges. The outer race clearance isabout z" on each side. This clearanceis obtained by pushing the bearing inuntil it seats against the shoulder, andthen pulling it outz".

7. The front bearing is then locked to theshaft in the same way as the rearbearing.


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OPERATING CONDITIONS

Space is provided for three rings of a"square packing at the impeller side of theLantern Ring. Packing should be of a gradesuited to the operating conditions of the

pump; square braided packing is regularlyfurnished. Excessive tightening of thepacking gland nuts causes shaft wear, isunnecessary, and should be avoided. Slightleakage, approximately 10-12 drops eachminute, is desirable to act as a packinglubricant. If a corrosive or abrasive materialis pumped, gland water at a maximumpressure of 15 PSI should be piped to theLantern Ring by way of the " pipeconnection and allowed to leak through thepacking for lubrication. The drip pan underthe shaft is provided with two " pipeconnections to drain off this leakage.

A grease fitting may be put in the " tappedLantern Ring connection if greaselubrication of the packing is desired. Waterpump grease is usually satisfactory.

LUBRICATION

The pump is shipped with sufficientlubricant packing in the bearing to assuretrouble-free operation for normal servicelife. Under normal operating conditions, no

lubricant needs to be added to thebearings. If the pump is disassembled, it isadvisable to pack the bearings with greaseproperly before re-assembly. Pack thebearing through approximately one-half ofits circumference. It is not necessary to putgrease in the bearing cap or pedestal.

The bearings normally may run attemperatures up to 180F, without injury. Atemperature of 180F is hotter than thehand can stand to touch for more than asecond or two, but will not burn off thepaint. The temperature may be determinedby sticking a thermometer to the bearingcap with heavy grease and leaving it fortwenty (20) minutes.

Should the bearings run hot, immediateservice is necessary. This abnormalcondition indicates that (1) the bearingsmay not be properly installed, (2) pump andmotor are out of alignment, (3) excessivegrease has been forced into the bearinghousing, (4) insufficient grease is present inthe housing, or (5) improper grade orcontaminated lubricant is present in thebearing housing. To correct this condition,first check motor and pump formisalignment. Check for proper amount ofgrease, and return the pump to service. Inaddition, a competent lubrication engineershould be consulted to recommend theproper lubricant for the particular operatingcondition.


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LONG TERM PUMP ANDMOTOR STORAGE

1. Pump packages should be storedindoors in a clean, dry and protectedenvironment.

2. The storage area is to be free from anyvibration and from extremes intemperature.

3. Motor and pump shafts are to berotated manually every 2 months. Arecord of the rotation should be made.

4. Grease in the motor and pump bearingsis to be purged at the time of removalfrom storage, making sure that an

ample supply of fresh grease is in eachgrease cavity.

5. Motor winding should be megged at thetime equipment is put in storage. At thetime of removal from storage, theresistance reading must not havedropped more than 50% from the initialreading. Any drop below this pointnecessitates electrical or mechanicaldrying of the motor windings.

Condensation from hot days and coolnights can fill the motor half full ofwater. This is a greater potentialproblem in damp areas.

6. If the pumps are to be stored outside,the pump suction and dischargeopenings should be sealed to preventany water from entering the pumphousing, causing rust of the fluid endduring storage.

RECOMMENDEDLUBRICANTS

Although the correct grease to use dependson the specific pump application, thefollowing list of lubricants represents some

grease manufacturer's recommendationsfor general service. Similar type greasesfrom other reputable grease manufacturersare also suitable.

Refer to Table 1-2.

Table 1-2. Recommended Lubricants

Available inPails

(Preferred)

Chevron SRJ-2

Texaco Premium RB

Shell Dolium-R

Amoco Rycon Premium Grease

Available inCartridge(Acceptable)

Exxon Unirex N2

Chevron Polyurea Ep 2

Texaco Mafak Multi-Purpose 2

Shell MP (Avalina) 2

Amoco Rycon Premium 2 EP


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CUSTOMER SERVICE

With over 120 locations worldwide, NationalOilwell is located near you. To find thenearest Distribution Service Center,machinery center or repair facility, please

give us a call at our main office listedbelow. Or, you may access our website,where you may search by location orcountry:

http://www.natoil.com/locations

SALES/TECHNICAL INFORMATION

A complete serial number record of everypump is maintained at National Oilwell.

For any additional information oninstallation, operation or service, call orwrite our Houston Headquarters or contactthe National Oilwell representative in yourarea.

Information requested can be more quicklyand accurately furnished if the size andserial number of the pump are given withyour request for information.

Access information from our sales andtechnical staffs by telephone or internet:

USA Toll-free: 1 (800) 800-4110

Internet: http://www.natoil.com

National Oilwell is a leading manufacturerof reciprocating plunger pumps, MissionFluid King centrifugal pumps, and fluid endreplacement parts. We also offer acomplete set of solutions to your fluidtransfer challenges. For more Information,contact National Oilwell directly at theHeadquarters in Houston, Texas. AllNational Oilwell products are availablethroughout the U.S. and around the worldfrom service centers, authorized

distributors, and representatives. Copyright 2001 by National Oilwell L.P, All Rights Reserved.NATIONAL OILWELL, NATIONAL, and OILWELL are registeredtrademarks of NATIONAL OILWELL L P. Houston, Texas, USA.

All other trademarks used are registered to their respectivecompanies. The information and data in this brochure, includingbut not limited to pictures, photographs, charts, diagrams,drawings, lists, written comments, and specifications, areaccurate to the best of our knowledge and belief, but are intendedfor general information only. Applications suggested for thematerials and other information are described only to help readersmake their own evaluations and decisions, and are neitherguarantees nor are they to be construed as express or impliedwarranties of suitability for these or other applications. NationalOilwell makes no warranty, either express or implied, beyond thatstipulated in National Oilwell's Standard Terms and Conditions of

Sale which are available upon request.

national sw centrifugal-installation, care and operation

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