Maintenance Manual VCP Upto 80mm

8/13/2019 Maintenance Manual VCP Upto 80mm

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MANUAL FORInstructions on Installations,

Operation and Maintenance of VCP

Pumping System

Manufactured by :

Varat Pump & Machinery Pvt. Ltd.20, NETAJI SUBHAS ROAD

KOLKATA 700 001

WEST BENGAL

INDIA


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1.0 GENERAL

1.1 This book let covers instructions for following Models (up to delivery size 80mm having

integral driving head with bracket) of VARAT Centrifugal Back Pull Out Process Pumptype VCP Model:

25VCP-132VCP-132VCP-232VCP-332VCP-4

40VCP-040VCP-1

40VCP-240VCP-350VCP-0

50VCP-150VCP-2

65VCP-380VCP-180VCP-1K

80VCP-1N

1.2 The cooling Chamber if provided, the cooling water connection should be made to thiscooling chamber when the liquid handled is hot (more than 800C).

1.3 For storing of pump for a long period the pump should be kept in dry place. Couplingshould be manually rotated once or twice a month to keep free.

1.4 When the pumps kept idle for a period after one use, it should be cleaned properly andoverhauling should be made before long storage.

2.0 INSTALLATION

2.1 LOCATION

The pump should be installed as far as near to the liquid source as possible. This willminimize the suction lift and pump will give better performance.Ample space should be provided on all the sides so that the pump can be inspected while inoperation and can be serviced conveniently whenever required.

2.2 FOUNDATION

The foundation should be sufficiently substantial to absorb any vibration and to form apermanent rigid support for the base plate. This is important in maintaining the alignment ofa direct-coupled unit. RCC foundation on a solid base is advisable. Foundation bolts of the

proper size should be embedded in the concrete located by a drawing or template. A pipesleeve about two and one-half diameter larger than the bolt should be used to allow

movement for the final position of the foundation bolts.


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2.3 ALIGNMENT

Pump and drive units that are supplied by the manufacturers, mounted on a common base

plate are accurately aligned before despatch. All base plates are flexible to some extent andalignments are likely to be disturbed during transit to some extent and therefore must not berelied upon to maintain the factory alignment. Re-alignment is necessary after the complete

unit has been leveled on the foundation and again after the grout has set and foundationbolts have been tightened. The alignment must be checked after the unit is piped up and re-checked periodically.

2.4 LEVELLING

When the unit is received with the pump and driver mounted on the base plate, it should beplaced on the foundation and the coupling halves disconnected. The coupling should not be

reconnected until all alignment operations have been completed. The base plate must be

supported evenly and placed closed to the foundation bolt. In each case, the supportsshould directly under the part base plate carrying the greatest weight and spaced closelyenough to give uniform support. A gap of about 25 to 50 mm should be allowed betweenthe base plate and foundation of grouting. Supporting will be such that it will not be

distorted or sprung by the uneven distribution of the weight. Adjust the wedges until theshafts of the pump and driver are in level. Check the coupling faces, suction and discharge

flanges for the horizontal or vertical position by means of spirit level.

2.5 FLEXIBLE COUPLINGA flexible coupling will not compensate for misalignment of the pump and driver shafts.The purpose of the flexible coupling is to compensate for temperature changes and to

permit the movement of the shafts without interference with each other while transmitting

power from the driver to the pump.2.6 MISALIGNMENT

There are two types of misalignment between the Pump shaft and the driver shaft:(a) Angular misalignment: Shafts with axis concentric but not parallel.(b) Parallel misalignment: Shafts with axis Parallel but not concentric. The unit can then

be granted by working soft concrete under the edges.


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The faces of the coupling hardens should be spaced for enough apart so that they cannotstrike each other when the drive rotor is moved hard over towards the pump. Dueallowance should be made for wear of the thrust Bearings. A minimum gap of 3 to 4 mm

should be maintained. The necessary tools for approximately checking the alignment of theflexible coupling are a straight edge and a taper gauge or a set of feeler gauge. For pin bushcoupling disconnect coupling halves before proceeding with alignment. A check for

angular alignment is made by inserting the taper gauge or feelers at four points between thecoupling faces and comparing the distance between the faces at four points spaced at 90degree intervals around the coupling, the unit will be in angular alignment when themeasurement show that the coupling faces are the same distance apart at all point (FIG 1).A check for parallel alignment is made by placing a straight edge across both coupling ring

at the top bottom and at both sides. The unit will be in parallel alignment when the straightedge rests evenly on the coupling ring at all positions. Care must be taken to have thestraight edge parallel to the axis of the shaft (FIG-2). Angular and parallel misalignments

are corrected by means of shims under the motor mounting feet. After each change it is

necessary to re-check the alignment of the coupling halves. It should not be necessary toadjust the shims, if used, under the pump.

DIAL GAUGE ALIGNMENT

An approved method for putting the coupling halves in final accurate alignment is by theuse of a dial indicator. Check the alignment by straight edge and fillers as accurately as

possible as described above. Fasten the indicator to the pump half of the coupling with the

indicator button resting on the other half of the coupling periphery (FIG 3). Set the dial tothe 0 and chalk mark the coupling half beside where the bottom rests. For any check, top or

bottom or sides, rotate both shafts by the same amount i.e all readings on the dial must bemade with bottom beside the chalk mark. The dials reading will indicate whether the driver

has to be raised or lowered or moved to either side. Accurate alignment of shaft centre canbe obtained with this method.


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2.8 PIPINGBoth suction and delivery pipes and accessories should be independently supported near the

pump so that when the flange bolts are tightened no strain will be transmitted to the pumpcasing. It is usually advisable to increase the size of both suction and delivery pipes at the

pump nozzles in order to decrease the loss of head from friction and for the same reasonpiping should be arranged with as minimum bends as possible, as these should be madewith a long radius wherever possible. The pipe lines should be free from scales, welding

residuals etc., and have to be mounted in such way that they can be connected to suctionand delivery flanges without any stress on the pump. Adequate supports should be given to

pipe lines so that the weight of the pipelines does not fall on the pump. The use ofminimum number of the bends and other fittings will minimise the friction losses.

SUCTION PIPE

The suction pipe should be as short as possible. This can be achieved by placing the pump

close to the liquid to be pumped. The suction pipe must be kept free from air leaks. This isparticularly important when the suction lift is high. A horizontal suction line must have agradual rise towards to the pump. Any high point in the pipe will be filled with air and thus

prevent proper operative of the pump. A concentric taper piece should not be used in ahorizontal suction line as it forms an air pocket in the top of the reducer and the pipe. Use

an eccentric per piece (FIG 5).

The end of the suction pipe must be well submerged to avoid whirlpools and ingress of airbut must be kept clear of any deposits of mud, silt grit etc. The pipe must be clear from any

side of wall by at least 450mm. The end of the suction pipe should be provided with astrainer of sufficient open area.


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2.9 DELIVERY PIPE

A check (non-return) valve and a gate or sluice valve (regulating valve) should be installedin the discharge line. The check valve placed between the pump and the gate valve is to

protect the pump from excessive pressure and to prevent water running back through thepump in case of failure of the driving machine i.e-excessive backpressure.Discharge piping should be provided with a sluice valve to control the discharge, if

required. The valve is used in primary, starting and when shutting down the pumps. Ifincrease are used on the discharge side to increase the size of discharge piping they should

be placed between the check valve and pump.

2.10 VACCUM EQUALIZING LINE (AND LIQUID LINE) (SEE FIGURE 3 )

If the pump draws from system under vacuum a equalising pipe must be carried from thehighest point of the suction line, however, as close to the suction flange of the pump as

possible, to the top of the feed tank to keep gas bubbles that might have been entrapped inthe flow from entering the pump. The line should be fitted with an isolating valve, whichshould be closed only for maintenance work on the pump set.Apply sealing liquid (external sealing) to the shaft seal cage to prevent entry of air in thecase of pumps with packed stuffing box. It is convenient to tap the sealing liquid from the

delivery line above the non-return valve.


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2.11 FOOT VALVE

It is advisable to install a foot valve to facilitate priming of pump. Foot valve should havesufficient clear passage for water. Care must be taken to prevent foreign matter from being

drawn into the pump or choking the foot valve and for this purpose an efficient strainershould be provided.

2.12 STUFFING BOXES AND PACKING

Stuffing boxes should be carefully cleaned and the packing placed in them. Be sure thatsufficient packing is placed at the back of the water seal cage. If the water to be pumped isdirty or gritty, sealing water should be piped to the stuffing boxes from clean outside source

of supply in order to prevent damage to the packing and shaft. In placing the packing, eachpacking ring should be cut to the proper length so that ends come together but do notoverlap. The succeeding rings of packing should be placed in the Stuffing Box so that the

joints of the several rings of packing are staggered and cutting the shaft. If the stuffing box

is not properly packed, friction in stuffing box prevents turning the rotor by hand. Onstarting the pump, Stuffing Box Packing should be left slightly loose without causing an airleak, and if it seems to leak instead of putting too much pressure on the gland, put someheavy oil in the stuffing box until the pump works properly and then gradually tighten up

the gland. The packing should be occasionally changed. In between the packing rings thereis a lantern ring which is to be grease punched before placement. It is to be placed such that

its outside groove start in the centerline of the hole of the central supply lubrication(provided at supply box).

MECHANICAL SEAL

Since mechanical seals are made in a wide variety of designs, the instruction for the specific

seal must be carefully studied and followed exactly. A Mechanical Seal is a precision

device and must be treated accordingly. If any leakage found, observe carefully whether itis found the sleeve face or from stuffing box flange. For flange leakage PTFE gasket to be

replaced. If adequate leakage from the sleeve surface then after checking of the seal facecompression to be increased. Sliding the seal rotary part towards the stationary parts can dothis. If the leakage is little then it is normally through the `O Ring provided inside therotary seal. The ring may be required to be replaced.

FITTED CONDITION

FIG. NO. 6

RIGHT WRONG


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2.13 LUBRICATION

Pump is usually provided with a special auto feed oil lubrication pot. Initially fill up oil atthe driving hand through the breather part. The plug provided at the side of driving hand

placed below the oil leveler to be removed during initial filling. When oil comes out from

the part then replace the plug and stop the oil filling through the breather part. Lifted the oilpot as explained in the figure 7 and fill up oil at the pot. Release the pot and find that due tospring action pot will take its place. Oil level inside the pot will decrease automatically untilthe pre-determined required level will reach. The repetition of the process of oil pot fillingis required if you find the pot empty. Never fill up oil through others part of oil pot, which

may cause excess filling of lubricating oil. Resultant to excess rise of temperature of thebearing.

2.14 BALL BEARING

Correct maintenance of ball bearings is essential. The bearing manufacturers give thefollowing as guide to relubrication periods under normal conditions.Three monthly whereon continuous duty.

Six monthly when on eight-hour per day duty.The bearings and housings should be completely cleaned and recharged with fresh grease

after 2500 hours or the nearest pump overhaul time. When oil lubrication is provided forbearing . Oil should be filled through oil pot to avoid overfilling of the bearing housing.

2.15 PRIMING

No pumping action occurs unless the pump casing is filled with liquid. Pump casing and

suction pipe must therefore be completely filled with the liquid and thus all air removedbefore the pump is started. Several different priming methods can be used depending on the

kind of installation and service involved.

(1) Liquid level above pumps level.Pump is set below liquid level of source of supply so that liquid always flows to

pump under positive head.

(2) Priming with Foot Valve.

(a) When pump is installed on suction lift with foot valve at the end of suctionline, fill pump with water from some outside source till all air is expelledand water flows through air vent.

(b) When there is liquid under some pressure in the discharge pipe, primingcan be effected by bypassing the pressure liquid around the check and gate

valve. Of course, the initial priming must be affected from some outsidesource.

NOTE: In this case, the foot valve must be capable of withstanding pump pressureand possible surge.

(3) Priming by ejector: An ejector operated by steam, compressed air or water underpressure and connected to air vent on top of casing can be used to remove air from

and prime the pump on suction lift installations.

(4) Priming by dry vacuum pump: A hand or power pump sucks in all the air from the

casing and the suction pipe, and thus primes the system


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3.0 PREPARATION OF PUMP STARTING:

After the pump and the drive are mounted, the plant should be prepared for starting.The following rules should be observed before starting the pump:

3.1 The pins are pad should be inserted into the coupling not before making sure of thecorrect rotation of drive. In case of the drive rotating in the wrong direction, theconnection of two cable conductors supplying the current to the motor should beinterchange in case of DOL starting.

3.2 Check presence of grease / oil in bearings and correct location of water deflector onshafts ensure flashing, quenching, lubrication in case of mechanical seal as well asif required as per design.

3.3 Gland packing should be tightly stuffed, but not over tightened. The sealingpacking should be tightened to such an amount as to allow the pumping liquid toseek to the outside. Over tightening of sealing packing causes quickly wear out ofshaft sleeves, increases its friction and lower the efficiency factor of the whole

plant.

3.4 Check the free rotation of pump rotor, turning it by hand to verify any majorobstruction or friction with wearing parts.

3.5 Check the proper order of suction and pressure pipelines, tightening of flanges,fittings of inlet valve and presence of drain plug.

3.6 Check the correct direction of rotation of pump and drive. The pump rotor shouldrotate according to direction of rotation marked on pump.

3.7 Making reasonably sure of the proper order of the whole plan and its readiness foroperation, the suction pipe should be primed with water / liquid. Arrangement for

priming funnel and three ways connection of pressure gauge with air-cock after

delivery flange but before delivery sluice valve is required.

3.8 The pump is being filled up (Primed) until the air-cock produces water jet without

air bubbles. Then the primary funnel, air-cock and sluice valve is required to beclosed. After all these operation and checking the pump is ready for starting.

4.0 STARTING AND STOPPING OF THE PUMP:

4.1 The pump should be loaded gradually, when the drive is engaged. When the primemover attains full speed, the regulating sluice valve should be smoothly opened.

This will avoid overloading of the drive.

4.2 On the other hand it should be kept in mind that a lengthy operation with

completely close sliding valve is likewise to be avoided. Since this causesunnecessary heating of the liquid in the pump.

4.3 By controlling the sliding valve the required flow and head may be obtained. After

setting of pressure gauge at required point, check ampere consumption, if found

exceed required value, pump should be stopped


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5.0 BEARINGS:

The shaft is supplied with anti-friction ball bearings or thrust bearing according toSize of pump. Generally SKF/NBC/RHP equivalent bearings are used.

6.0 LUBRICATION:

Bearings are normally greased lubricated. Refilling period is after 1000 hours ofrunning. Bearing temperature is permissible to rise 40 degree Centigrade aboveambient temperature. Grades of recommended grease are INDIAN OIL-SERVOGEM-3 or CALTEX-STARFAX-3, H.P.C.L. NATRA-3 or equivalent. Incase of oil lubrication bearing oil should be maintained in the oil indicator. Servo

30/40 may be used for this purpose.

7.0 STUFFING BOX:

Stuffing Boxes are extra deep to reduce the leakage and champion style-3116 Gasbestos grease and graphite packing is normally used. However, stuffing Box

packing or seal suitable for corrosive liquid is supplied against specificrequirements. Generally the stuffing Box packing is sent duly packed in the pump.

Mechanical seal must be over oiled before starting the pump after long timestorage.

8.0 GASKET

Compressed asbestos packing gasket for joining of volute casing is used. However,packing gasket suitable to handle corrosive liquid and high temperature fluid is

supplied against specific requirements.

9.0 COUPLING

Normally pin-bush flexible type or star type spider coupling with or without spaceris used. Other type of coupling may be supplied against specific requirements.

10.0 GUIDE RING / WEARING RING

Replaceable ring for protection suction cover and gland cover provided in VCP

type pumps.

11.0 SHAFT SLEEVES

Replaceable sleeve for protecting the shaft. For Balance seal, step down sleeve is

being provided.

12.0 SPARE PARTS

One set bearing, Wearing Ring, Shaft Sleeve, Gland Packing, Gaskets, Oil seals,Imp. Lock nut, circlip, Imp. Key, sleeve lock screw must always be kept with the

actual users of the pump to ensure uninterrupted service from the pump.


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13.0 TROUBLE SHOOTINGSL.NO. DEFECTS CAUSES REMEDY

1. Pump does

not deliverliquid.

(1)Insufficient quantity of

water/water not filled in pumpcasing

(1) Fill up pump casing with

clear water or liquid to bepumped.

(2) Incorrect direction ofrotation.

(2) Change the direction ofrotation of prime mover.

(3) Pump is clogged. (3) Check up Impeller mayclog. Clean Suction pipe and

Strainer.

(4) Pump speed too low. (4) Check up speed of prime

mover and adjust.

(5) Suc. Lift too high. (5) Reduce Suc. Lift.(6) Leakage in Suc. Pipe. (6) Prevent leakage in suc.

Pipe.

(7) Incorrect layout of Suc. Line. (7) Correctly install the Suc.Line.

(8)Valve in Suc. Line not opensproperly.

(8) Check up the opening ofline valve.

(9) Shaft Sleeve & Glandpacking worn and air leaks.

(9) Replace Shaft-Sleeve &Gland Packings.

(10) Delivery liquid too viscous. (10) Liquid viscosity to bechecked & corrected.

(11) Incorrect selection of pump

for operating condition.

(11) Replace the pump with a

suitable designed capacity.

2. Not enoughwaterdelivered.

(1) Speed too low. (1) Check up speed of primemover and adjust.

(2) Leakage in Suction sidefitting and piping

(2) Prevent leakage in suctionpipe and fittings.

(3) Discharge Head too high. (3) Check up vertical head andfrictional losses.

(4) Pump Casing empty. (4) Fill up the pump casing.

(5) Rubber Flap Valve clogged. (5) Check up rubber Flapassembly & leakage from

pump casing.

(6) Shaft Sleeve/Gland packingworn and air leaks.

(6) Replace the shaftSleeve/Gland Packing.

(7) More clearance betweenImpeller and Wearing Plate.

(7) Measure the clearancebetween Impeller and WearingPlate and adjust by using

proper Packing.

(8) Suction lift too high or

suction pipe too long.

(8) Avoid High Suction lift

and Suction piping.


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SL.NO.

DEFECTS CAUSES REMEDY

3. Pump takesMore Power.

1) Speed too high. (1) Check and correct thespeed.

(2) Head less than rating. (2) Provide minimum head.

(3) Shaft Bent (3) Check and replace the

Shaft.

(4) Mis-alignment of the set. (4) Correct the alignment.

4. Not enoughpressure.

(1) Prime mover not running atrated speed.

(1) Check the speed of Primemover and correct it.

(2) Leakage through GlandPacking.

(2) Replace Gland Packing.

(3) Too much clearancebetween Impeller and Wearing

plate.

(3) Measure the clearancebetween Impeller and Wearing

plate and adjust by usingproper packing.

5. Pump vibratesand makes morenoise.

(1) Pump casing not filled withWater/Liquid (it is only

possible only during priming

time).

(1) Fill up the pump casing.

(2) Suction lift too high. (2) Reduce the suction lift or

install the Foot valve.

(3) Mis- alignment (3) Correct the alignment.

(4) Foundation not rigid (4) Check up the foundation

bolt.(5) Shaft bent (5) Replace the shaft

(6) Bearing Worn out (6) Check & replace Bearing.

(7) Lack of Lubrication (7) Lubricate the Bearings.

(8) Pump operating at very lowcapacity.

(8) Reduce total head.

6. Bearings haveshort life.

(1) Mis- alignment (1) Correct the alignment.

(2) Shaft bent (2) Check the shaft condition.

(3) Excessive Grease or lack ofgrease.

(3) Check up lubrication.

(4) Dirty water getting intoBearings.

(4) Protect bearing neatly.

14.0 MAINTENANCE

Preventative maintenance schedule is the periodical checks and precautions by whichpossibilities of failures and breakdowns are made very remote.


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14.1 Daily Checks

1.1 Pressure gauge reading1.2 Bearing temperature1.3 Leakage through stuffing box

1.4 Noise and vibration1.5 Voltage and current

1.6 Constant flow of cooling water.

14.2 Periodical Maintenance

1.1 Replenish the grease

1.2 Change the stuffing box packing

1.3 Check the alignment of the pump set1.4 Calibrate the measuring instruments1.5 Check the sealing and cooling connections for leakage etc.

15.0 OVERHAULING

Normally the pump will be due for overhauling after about 3000 working hours. Pumpdismantling and assembling should be done by skilled personal. Special attention should be

given to continuous running pumps & advice to keep stand by pump for emergencyservices.

15.1 DISMANTLING OF PUMP:

1. Remove air cock, pressure gauge, grease caps, and other fittings.

2. The Design advantage of this BPO pumps is to dismantling the pumpwithout dismantling the pipeline connection or suction & delivery flange. Ifspacer type coupling provided then remove both side coupling key (Item

no. 21) by unscrewing it and then remove the spacer (Item no. 24) of thecoupling. Unscrew and remove the nut (Item no. 29) of volute casing and

take out the pump assembly without disturbing the casing.

3. Remove impeller lock nut (Item no.01), by wrench of standard size. Now

pull out the Impeller (Item no.04) by hand or with the help of a puller.Take out the Impeller key (Item no.05).

4. Loosen the gland nut (Item no.35) of stuffing box and remove gland flange(Item No.34) and take out all gland packing (Item no.32) along with lantern

ring (Item no.33) for gland pack pump.In case of mechanical seal dont disturb the gland flange nut (Item no.15).After removal of impeller, take out the guide ring (Item no.08) unscrewing4 numbers screw (Item no.07). Take out the sleeve with mechanical sealrotating assembly towards the impeller side. This is a major advantage of

our mechanical seal design that we can remove the rotating part of sealwithout disturbing the stuffing box. Remove key for sleeve if provided

separately.


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5. Dismantle gland plate (Item no.28) with stuffing Box (Item no.11) [along

with seal cover for mechanical seal pump] from the driving head byremoving the bolts (Item no.31), which are fitted with driving head & gland

plate.

6. Remove the align screw (Item no.22) provided at coupling and take outpump coupling half.

7. Remove bearing cover at driving end (Item no.51) as well as non-drivingend (Item no.38) by unscrewing the bolt (Item No.40). Take out oil seal

(Item No.41 & 50) from bearing cover for checking.

8. Pull out the pump shaft along with bearings towards driving end. Remove

bearing lock nut and washer (Part No.48/49) before removal of the bearingfrom the shaft. Pull out bearings (Item no.43 & 45) from the shaft from

both ends. If cylindrical roller Bearing provided at NDE then rotary outercasing of the Bearing to be removed from NDE housing if found damaged,

otherwise dont remove racer & casing of bearing.

9. For mechanical seal pumps take out seal cover provided with stationary

parts of mechanical seal by unscrewing 4 Nos. glands nut. Pull out themating rings (stationary seal) (Item no.15) from the seal cover.

10. After removal of all above pump parts it is necessary to check up properlyfor any wear and tear and if any part is found to be worn out, the same

should be replaced or rectified.

15.2 Reassembling of Pump:

1. Before reassembling all parts are to be cleared and it is advised to paint all the parts, whichare without machined faces. Paints should be dry before reassembling. Bearings are to becleaned with petrol. All machined faces should be rub with Mobil-oil.

2. Fit DE bearings (Item no.45) with the pump shaft (2 nos. Bearing to be provided as per

Drawing, if angular contact bearing provided then fit back to back and Lock by bearing nutwith lock washer as applicable. Other bearing of non-driving end to be fitted with the shaft.Put appropriate quantity of grease to bearings. For oil lubrication dont apply any grease to

the Bearings.

3. Now insert the pump shaft with bearing assembly from driving end inside driving headkeeping NDE bearing towards driving head. i.e. keeping proper direction of the shaft. If

NDE bearing is of cylindrical roller type of NU-300 series then only inner race of the

bearing to be fitted with the shaft and balance part of the bearing to be fitted inside thehousing.

4. Fix bearing cover (Item no.51) at driving end and other bearing cover (Item no.39) at non-driving end. Now put coupling key at shaft, fit pump half coupling (Item no.21) and tighten

the coupling grub screw (Item no.22).

Insert water-deflector from NDE side of the shaft.


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5. For gland pack pump, insert the shaft sleeve in such a manner keeping the line straight sothat it should be locked by sleeve lock screw and rotate with the shaft rigidly. For mech.

seal pump, seal cover is to be fitted with stationary part of the seal. Initially this seal coverto be fitted with stuffing box. Then the Stuffing box to be fitted with Gland plate. Fitmechanical seal (if applicable) on the sleeve before insert it. Sometimes, sleeve is provided

with a separate key instead of sleeve lock screw. Provide this key after placement of thesleeve.

6. Now insert Gland plate with stuffing box along with seal cover to be filled with drivinghead by tightening the nut. Dont forget to provide 1 no. Rubber O Ring on shaft for

mech. seal application.

7. Provide guide ring (Item no.08) with 4 nos. screw (Item no.10).

8. Put impeller key to shaft and PTFE gasket on sleeve for mech. seal pump and push fit theimpeller on the shaft. Tighten the impeller lock nut. Apply some Teflon tape on the threadof shaft before tightening the impeller lock nut. Provide a PTFE Gasket between impellerand nut for mechanical seal pump.

9. Now the assembly is ready to fit with volute casing providing one recommended ring gasket

(Item no.27) and tightens the stud nut (Item no.29).

10. Insert stuffing box packing by staggering the joints 180 degree and push each ring inside asfar as possible. Dont forget to insert lantern ring keeping its center-line coincide withexternal lubricating supply port provided at stuffing box. Fix Gland flange on the stuffing

box by nut. Tighten the stuffing box packing by tightening the gland nuts uniformly. While

tightening the gland nuts, please see that the unit can be rotated by hand.

Fit all grease caps, Air-cock, pressure gauge and other fittings. This completes the re-assembling.

While ordering for spares specify model and serial number of the pump.

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Maintenance Manual VCP Upto 80mm

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