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2.5 Install suction piping

1.

General - properly installed suction piping is of extreme importance for trouble-free centrifugal pump
operation.

a) The suction pipe should be as large or larger than the pump suction.

b) lncreasers, if used, should be eccentric and preferably at the pump suction flange, sloping side

down.

c)

A centrifugal pump should never be throttled on the suction side for capacity adjustment.

d) When more than one pump is operating from the same source of supply, separate suction

lines, if possible, should be used. If not possible for separate lines, piping arrangement as
shown in

Figure 7: on page 17

is recommended.

2.5 Install suction piping

3316 Installation, Operation and Maintenance Instructions

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Summary of Contents for GOULDS PUMPS 3316

Page 1: ...Installation Operation and Maintenance Instructions 3316 ...

Page 2: ......

Page 3: ...8 3 4 Connection of equalizing piping 20 3 5 Connection of piping to quenching gland 20 3 6 Installation and connection of bearing cooling water piping 21 3 7 Connection of drain piping 21 4 Starting Pump 22 4 1 Priming 22 4 2 Regulation of cooling water flow 25 4 3 Adjustment of stuffing box gland 26 4 4 Alignment final 26 4 5 Doweling 26 5 Operation 27 5 1 Operation 27 5 2 Operating at reduced c...

Page 4: ...ing stuffing boxes 31 7 5 Dismantling of pump 32 7 6 Sectional View 34 7 7 Optional Constructions 34 7 8 Parts List and Interchangeability Chart 35 7 9 Pressure Temperature Capability 37 7 10 Overhaul of pump 38 7 11 Reassembly of pump 41 7 12 Changing rotation of pump in field 46 7 13 Emergency ball bearing replacement 47 7 14 Spare parts 47 7 15 Instructions for ordering spare parts 48 Table of ...

Page 5: ...com en US Tools and Resources Litera ture or by contacting your nearest Goulds Pumps sales representative These manuals must be read and understood before installation and start up For additional information contact your nearest Goulds Pumps sales representative or visit our Web site at https www gouldspumps com 1 2 Safety warnings Specific to pumping equipment significant risks bear reinforcement...

Page 6: ...es a hazardous situation which if not avoided could result in death or serious injury Example Pump shall never be operated without coupling guard installed correctly CAUTION Indicates a hazardous situation which if not avoided could result in minor or moderate injury Example Throttling flow from the suction side may cause cavitation and pump damage ELECTRICAL HAZZARD WARNING Indicates the possibil...

Page 7: ... without safety devices installed WARNING NEVER operate pump with discharge valve closed WARNING NEVER operate pump with suction valve closed WARNING DO NOT change service application without approval of an authorized ITT Goulds Pumps representative WARNING Safety Apparel Insulated work gloves when handling hot bearings or using bearing heater Heavy work gloves when handling parts with sharp edges...

Page 8: ...in contact of metal parts heat generation and breach of containment WARNING Lock out driver power to prevent accidental start up and physical injury WARNING The impeller clearance setting procedure must be followed Improperly setting the clear ance or not following any of the proper procedures can result in sparks unexpected heat generation and equipment damage WARNING If using a cartridge mechani...

Page 9: ...er to prevent accidental startup and physical injury CAUTION Allow all system and pump components to cool before handling them to prevent physi cal injury CAUTION If pump is a Model NM3171 NM3196 3198 3298 V3298 SP3298 4150 4550 or 3107 there may be a risk of static electric discharge from plastic parts that are not prop erly grounded If pumped fluid is non conductive pump should be drained and fl...

Page 10: ...s can be T1 to T6 see following table Table 2 Temperature class definitions Code Maximum permissible surface temperature in C F Minimum permissible surface temperature in C F T1 450 842 372 700 T2 300 572 277 530 T3 200 392 177 350 T4 135 275 113 235 T5 100 212 Option not available T6 85 185 Option not available The code classification marked on the equipment must be in accordance with the specifi...

Page 11: ...ve See Figure 1 on page 9 c The foundation bolts should be of sufficient length so that they project through the nut approxi mately after allowance has been made for grouting to 1 the thickness of the bed plate and the thickness of the foundation bolt nut See Figure 1 on page 9 Figure 1 3 Preparing Foundation for Mounting Prior to setting unit upon the foundation clean the top surface of concrete ...

Page 12: ... fill the space under the bedplate to the level of the grout hole in the top of the bedplate d With a trowel strike along the top of the wood dam to give a neat finished appearance at this point e Allow grout to harden at least 48 hours 2 3 Initial alignment Alignment of the pump and driver through the flexible coupling is of extreme importance for trouble free mechanical operation If the driver w...

Page 13: ...lel by inserting a taper gauge or feeler at four points on the circumference of coupling halves at 90 intervals See Figure 3 on page 11 The unit will be in angular alignment when the measurements show the coupling faces are the same distance apart at all points The gap between the coupling halves should be checked at this time This depends on the type of coupling used and this information will be ...

Page 14: ...t be supported independently of the pump The piping should always lineup natu rally with the pump flanges Never draw the piping into place by use of force at the flanged suc tion and discharge connections of the pump 2 The piping both suction and discharge should be as short and direct as possible Avoid all un necessary elbows bends and fittings as they increase the friction losses in the piping T...

Page 15: ... preferably at the pump suction flange sloping side down c A centrifugal pump should never be throttled on the suction side for capacity adjustment d When more than one pump is operating from the same source of supply separate suction lines if possible should be used If not possible for separate lines piping arrangement as shown in Figure 7 on page 17 is recommended 2 5 Install suction piping 3316...

Page 16: ... Piping should slope upwards from source of supply No portion of piping should extend above the pump suction nozzle b All joints must be air tight c The suction pipe should always be submerged into the source of supply as shown in Figure 6 on page 16 2 5 Install suction piping 14 3316 Installation Operation and Maintenance Instructions ...

Page 17: ...installed in the suction line to permit closing the line for pump inspection and maintenance b Keep suction pipe free from air pockets Piping should be level or slope gradually downward from the source of supply No portion of the piping should extend below the pump suction flange c The size of entrance from the supply should be no smaller than the suction pipe d The suction pipe should be below th...

Page 18: ...Figure 6 2 5 Install suction piping 16 3316 Installation Operation and Maintenance Instructions ...

Page 19: ... the connection of the piping causes unit to be out of alignment correct piping to relieve strain on the pump 2 8 Check rotation The direction of rotation is marked on the pump casing Make sure that driver rotates in the same direc tion On electric motors jog starting switch to be sure wiring is connected for correct rotation Be sure that coupling is disconnected 2 9 Connection of coupling Connect...

Page 20: ...nd of the pump Do not install the oiler in the openings for the optional cooling coils which are directly below the oiler See 5 3 Operating at reduced head on page 28 Figure 8 Oiler Fill the oiler bottle with oil and replace in the oiler The housing is filled when an oil level remains in the oiler bottle More than one filling of the bottle may be required Never fill the housing through the oiler w...

Page 21: ... the next ring is added Two extra rings of packing are fur nished in each set of packing The extra ring for each side may be added as required e Insert gland packing 210 into recess in each gland half and trim off excess flush with face of each gland half f Run 13 UNC nuts 355 about threefourths the length of the threaded part of bolts 353 and place cupped washers 354 on gland bolts See Figure 11 ...

Page 22: ...g piping The equalizing pipe 102 and fittings are shipped separately in the box of fittings accompanying the pump The ends of the piping must be connected to the openings in the top of each stuffing box for equalizing the pressure on the two boxes See 7 3 Sectional view on page 31 This piping must be used on all units including pumps fitted with single or double mechanical seals 3 5 Connection of ...

Page 23: ...n fittings into each of the four openings 5 Push each OD x 9 long copper tube through one fitting until it comes out the fitting on the other side Center tubing so that equal lengths project from each side Tighten nuts on compression fit tings 6 Connect the pipe x OD tubing elbow to each end of the copper tube This provides a pipe connection for cooling water piping 7 Connect cooling water The inl...

Page 24: ...When pump is installed as shown in Figure 12 pump will prime itself Open gate valve on suction and close discharge gate valve Open air vent valves until all air is expelled and water flows through openings Close air vent valves start pump open discharge gate valve and pump will continue to be primed for any future starting Figure 12 This method is the simplest and particularly for automatic operat...

Page 25: ...ump and suction piping until water flows from priming pump Close valve S start pump and open discharge gate valve By reversing connections on priming pump and extending priming pump suction to source of liquid supply centrifugal pump may be primed by pumping liquid into casing until liquid comes out of the open 1st stage air vent valve In either of these methods a and b the pump will remain primed...

Page 26: ...xhausting all liquid from discharge line due to a leaky foot valve If the valve in the bypass is left open as described above the foot valve must be capable of withstanding static head pressure of the system 3 Priming by Ejector See Figure 16 on page 25 On suction lift installations an ejector operated by steam compressed air or water under pressure and connected to tapped opening in second stage ...

Page 27: ...led near the primer pump and the vacuum switch set to automatically start or stop the primer pump according to the vacuum required to keep the sys tem primed 4 2 Regulation of cooling water flow The supply of liquid to the water cooled bearings and quenching glands should be regulated by valves in the supply line Approximately G P M to each gland and 1 G P M to each bearing cooling coil is suffi c...

Page 28: ...ce between the driver and the pump At the operating temperature the unit will be in correct horizontal and vertical parallel alignment when a straight edge rests evenly on both halves of coupling rims at four points 90 apart As cautioned in 7 changing alignment in one direction may alter the alignment in another Check thru each alignment procedure after making any alignment change 4 5 Doweling Dow...

Page 29: ... to drive the pump is converted into heat If this condition exists over a long period the temperature of the liquid in the pump may increase until the boiling point is reached If this occurs the rotating parts are exposed to vapor with no lubrication and they may score or even seize to the stationary parts and furthermore if running clearances have enlarged due to wear seizure may not take place C...

Page 30: ... point 5 4 Operating with surge conditions in line If pump is installed with a quick closing valve in discharge line that closes when pump is running danger ous pressure surges may be built up that can cause damage to the pump or line In services of this kind some cushioning arrangement must be provided to protect the pumping equipment 5 5 Operating under freezing conditions When exposed to freezi...

Page 31: ...sure that turbine receives full steam pressure 6 2 Not enough water delivered 1 Priming casing and suction pipe not completely filled with liquid 2 Speed too low 1 3 Discharge head higher than anticipated Check total head particularly friction loss 4 Suction lift too high suction pipe may be too small or long causing excessive friction loss Check with gauge 5 Impellers or suction pipe or opening p...

Page 32: ... Check with gauge 7 Impellers plugged 6 5 Pump takes too much power 1 Speed too high 1 2 Head lower than rating pumps too much water 3 Liquid heavier than water Check viscosity and specific gravity 4 Mechanical defects Shaft bent Rotating element binds Stuffing box too tight Pump and driving unit misaligned 5 Wrong direction of rotation 1 6 6 Pump leaks excessively at stuffing box 1 Packing is wor...

Page 33: ...nal to investigate Check to see that oil is of proper viscosity and that oil level is neither too high nor too low The unit should also be checked for unstable hydraulic operation and unnecessary loads such as coupling misalignment Occasionally when the pumps are first started the bearings seem to run extremely hot This high tem perature is frequently caused by oil seals not the bearings As soon a...

Page 34: ...rked for identification before disassembly 7 Carefully lift rotating assembly from unit and place on padded supports which will not injure the shaft sleeves 8 Note the distance from the end of the shaft to the face of the pump half coupling so that the cou pling half can be correctly positioned when reassembled Pull the coupling half from pump shaft 9 Remove coupling key 10 Remove constant level o...

Page 35: ... a pin spanner or strap wrench unscrew sleeve by turning it counter clockwise Do not use pipe wrench Never attempt to remove the sleeve 104 which has no span ner holes until impeller and impeller key are removed from shaft 19 Tap the impellers 101 and 145 with diaphragm 146 in place from shaft with a lead mall Tap evenly around the impeller as near as possible to the shaft Do not drive against the...

Page 36: ...7 6 Sectional View 7 7 Optional Constructions 7 6 Sectional View 34 3316 Installation Operation and Maintenance Instructions ...

Page 37: ...standard Used when impeller is furnished with wearing rings Used when impeller is furnished without wearing rings Sizes 1 1 2 x 2 9 2 x 3 9G 2 x 3 11 and 3 x 4 11G not available in steel or stainless steel Flame hardened to 550 Brinell B ductile iron on Group L 7 8 Parts List and Interchangeability Chart 3316 Installation Operation and Maintenance Instructions 35 ...

Page 38: ...s 5 8 1 1 1 8 Min casing corrosion allow ance 1 8 Casing capacity gallons with pump assembled 3 4 1 3 4 3 4 4 6 3 4 19 28 3 4 Stuffing Box Stuffing box bore 2 2 1 2 3 1 4 Stuffing box depth to stuff ing box bushing 2 5 16 2 13 16 3 1 4 Stuffing box packing size 5 16 x 5 16 3 8 x 3 8 3 8 x 3 8 Stuffing box no of packing rings 5 5 6 Width of lantern ring 5 8 7 8 Shaft Shaft dia at impellers Shaft di...

Page 39: ...terial Acceptable minimum standard ANSI mating flanges and fittings Suction Discharge M A 316 SST 300 PSI flat face 316 SST 300 PSI flat face 316 SST B Bronze 300 PSI flat face bronze C C1 250 PSI flat face cast iron S D 316 SST 300 PSI flat face 316 SST E Bronze 300 PSI flat face bronze F C1 250 PSI flat face cast iron L I 316 SST 300 PSI flat face 316 SST 300 PSI flat face 316 SST J Bronze 300 P...

Page 40: ... one impeller should not exceed the clearance on the other impeller in the same pump by more than 003 NOTICE 1 Replacement impeller rings are furnished 021 to 039 oversize and must be turned to size after mounting on impeller See wearing ring chart below 2 The diametrical clearance on one impeller should not exceed the clearance on the oth er in the same pump by more than 003 3 The fit of the impe...

Page 41: ...Figure 20 7 10 Overhaul of pump 3316 Installation Operation and Maintenance Instructions 39 ...

Page 42: ...clearance is 020 to 024 for all materials If progressive wear contributes to a decrease in performance and or excessive leakage through the stuffing box the shaft sleeve and at times the stuffing box bushing should be replaced 5 Condition of Shaft Sleeves If the outer surface of the shaft sleeve at the packing area is deeply grooved the sleeve should be replaced 6 Conditions of Shaft Check shaft f...

Page 43: ...he impellers and sleeves on the shaft in relation to the rotation of the pump To do this face the discharge flange of pump The locking shaft sleeve 104 sleeve with keyway must be on the right as shown in Figure 21 and the impellers must rotate in correct relation to the casing as shown in the end views in Figure 21 Figure 21 3 Mark the location of the keyways on the outside of both the second stag...

Page 44: ...Figure 22 Left hand pump 7 11 Reassembly of pump 42 3316 Installation Operation and Maintenance Instructions ...

Page 45: ...oes not have spanner wrench holes Turn sleeve in a clockwise direction on shaft until the dimension from the threaded end of the sleeve to the shaft shoulder at thrust bearing or outboard seat agrees with the dimension 7 11 Reassembly of pump 3316 Installation Operation and Maintenance Instructions 43 ...

Page 46: ...If old bearings or new ones that have been allowed to become dirty are being used clean thor oughly before installing as follows Use a clean pail or receptacle Pour into it one or two quarts of clean waterfree kerosene Dip the bearing into the kerosene and spin slowly Repeat until all traces of grease have been removed Now blow dry with clean filtered compressed air holding the two races together ...

Page 47: ...end play Be cause of machining tolerances a replacement thrust bearing may vary in width by as much as 0 020 End play must be checked and adjusted by adding or removing gaskets as described in 7 11 Reassembly of pump on page 41 Step 30 23 Smooth up and clean casing wearing ring diaphragm stuffing box bushing and bearing housing seats in upper and lower half casing The casing and bearing caps are p...

Page 48: ... in place Check the rotating element for free turning and if no binding is apparent tighten casing parting nuts alternately on each side of the pump starting from the center The shaft should turn freely after all nuts are tightened 30 Clamp an indicator to the pump so that the button rests against the end of the shaft Push the shaft back and forth as far as possible Total end play must be at least...

Page 49: ... seat on the shaft Start bearing square and tap on shaft up to the shaft shoulder Use a driving sleeve as shown in Figure 21 on page 41 and Figure 22 Left hand pump on page 42 d Screw shaft nut 110 tight against bearing e Align locks on bearing end cover with the grooves in lower half casing and rotate bearing end cover 180 so that the locks are at the bottom f Bolt bearing end cover 109 to bearin...

Page 50: ...nt or desirable to carry the spare parts listed in items 1 or 2 the following list is suggested as a minimum for servicing the pump under ordinary conditions of wear a Stuffing box packing 106 one set for two stuffing boxes b Stuffing box gland packing 210 one set for four gland halves c Shaft sleeves 104 and 126 one each d Ball bearings 112 and 137 one of each e Shaft nut 110 one required 7 15 In...

Page 51: ... and more information www gouldspumps com ITT Goulds Pumps Inc 240 Fall Street Seneca Falls NY 13148 USA 2020 ITT Inc The original instruction is in English All non English instructions are translations of the original instruction Form IOM 3316 en US 2020 02 ...

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