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5.3 Operating at reduced head

On motor driven pumps, when discharge head or pressure is allowed to drop considerably below the rat-
ed point for any length of time, the motor should be watched for heating because the pump capacity in-
creases rapidly with reduced head, as does horsepower consumption. If this condition is likely to persist,
arrangements should be made either to manually or automatically throttle the discharge valve to build up
head to a safe 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 freezing conditions and pump is standing idle, liquid inside the pump should be
drained by removing drain plugs in bottom of casing and opening air cocks at top. Cooling water should
also be drained from the water-cooled bearing (if water-cooled bearings are used).

5.3 Operating at reduced head

3405-3406-3416 Installation, Operation and Maintenance Instructions

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Содержание Goulds Pumps 3405

Страница 1: ...Installation Operation and Maintenance Instructions 3405 3406 3416 ...

Страница 2: ......

Страница 3: ...gs 20 3 2 Driver bearings and coupling 21 3 3 Stuffing boxes 21 3 4 Connection of water seal piping 23 3 5 Connection of piping to quenching gland 23 3 6 Connection of bearing cooling water piping 26 3 7 Connection of drain piping 26 4 Starting pump 27 4 1 Priming 27 4 2 Regulation of cooling water flow 30 4 3 Adjustment of stuffing box gland 31 4 4 Alignment final 31 4 5 Doweling 31 5 Operation 3...

Страница 4: ...7 1 Lubrication bearings 37 7 2 Repacking stuffing boxes 37 7 3 Sectional view 39 7 4 Dismantling of pump 45 7 5 Reassembly of pump 46 7 6 Changing rotation of pump in field 54 7 7 Overhaul of pump 54 7 8 Emergency ball bearing replacement 55 7 9 Spare parts 56 7 10 Instructions for ordering spare parts 57 Table of Contents 2 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 5: ...Read thoroughly Sections 2 Installation on page 10 3 Preparation for operation on page 20 4 Starting pump on page 27 and 5 Operation on page 32 and be sure to follow the instructions for installation and operation Sections 6 Trouble check list on page 34 and 7 Care and maintenance on page 37 are answers to trouble and maintenance questions Keep this instruction book handy for reference Kindly dire...

Страница 6: ...n 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 abov...

Страница 7: ...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 possibility o...

Страница 8: ...out 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 espe...

Страница 9: ...ntact 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 mechanical s...

Страница 10: ... 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 flushed...

Страница 11: ... 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 specified ar...

Страница 12: ... Figure 1 on page 10 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 10 Figure 1 3 Preparing Foundation for Mounting Prior to setting unit upon the foundation clean the top surface of concrete a Pu...

Страница 13: ...ely 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 drive...

Страница 14: ...eeler at four points on the circumference of coupling halves at 90 intervals See Figure 3 on page 12 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 found in the instructions for the s...

Страница 15: ...s 200 F and over set the motor and pump shafts at the same height Thin shim stock should be used under the driver feet to establish parallel alignment In some in stances shims may be required under the pump feet 7 Bear in mind always that alignment in one direction may alter the alignment in another Check through each alignment procedure after making any alignment alteration 2 4 Piping general 1 A...

Страница 16: ...perly 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...

Страница 17: ...ng 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 17 2 5 Install suction piping 3405 3406 3416 Installation Operation and Maintenance Instructions 15 ...

Страница 18: ...lled 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 the liq...

Страница 19: ...Figure 6 2 5 Install suction piping 3405 3406 3416 Installation Operation and Maintenance Instructions 17 ...

Страница 20: ...ping 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 coupling following instructions for the particular make of coupling furnis...

Страница 21: ... view on page 39 The inlet line should be at the bottom and should have a shut off valve installed to regulate flow See Reg ulation of cooling water flow for instructions for regulating cooling water flow On the Model 3416 the cooling coils are installed as follows 1 Refer to Figure 1 which shows the installed cooling coil 2 Special fittings and tubing are in the box of fittings sent with the pump...

Страница 22: ...els 3405 and 3406 or 250 F Model 3416 for extended periods of time use of cooling water as outlined in 3 5 Connection of piping to quenching gland on page 23 and 3 2 Driver bearings and coupling on page 21 and or use of a special high tem perature oil should be considered For extreme conditions refer to factory or a lubrication expert for a recommendation The constant level oilers are found in the...

Страница 23: ...s as standard However mechanical seals either of single or double type can be furnished on order Stuffing Boxes with Packing Rings In the box of fittings accompanying the pump will be found the stuffing box packing The standard pack ing is John Crane Super Seal No 1 and is a general purpose plastic type packing composed of special long fibre pure asbestos suitable anti friction metal particles fin...

Страница 24: ...d trim off excess flush with face of each gland half Now insert lower half gland 107 into stuffing box Run 20 SAE nuts 355 about three fourths the length of the threaded part of bolts 353 and place cupped washers 354 on gland bolts Insert round flattened end of gland bolts into recesses of bearing housing 134 or 166 on Model 3405 or into recesses of bearing housing cover 160 on Model 3406 Threaded...

Страница 25: ...eal piping and plug the tapped openings in the casing Pipe a clean water supply with a shut off valve to each of the openings at the top of stuffing boxes at a pressure slightly higher than the suction pressure on the pump The water seal piping when required is shipped separately in the box of fittings accompanying the pump When this piping is used one end is attached to the tapped opening in the ...

Страница 26: ...g housing slots Nuts and spe cial cup washers should be all the way back on the bolts toward the bolt heads as shown 4 Install top half of stuffing box gland over gland bolts and bottom half of gland 3 5 Connection of piping to quenching gland 24 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 27: ...ps are furnished with seals 1 Model 3405 Between 180 F and 250 F when bearing housings are not cooled and between 250 F and 350 F in addition to bearing housing cooling 2 Model 3406 Between 180 and 250 F 3 Model 3416 Between 250 and 350 F when bearing housings are not cooled and between 350 and 400 F in addition to bearing housing cooling 3 5 Connection of piping to quenching gland 3405 3406 3416 ...

Страница 28: ...off valve installed to regulate flow See Reg ulation of cooling water flow for instructions for regulating cooling water flow On the Model 3416 the cooling coils are installed as follows 1 Refer to Figure 1 which shows the installed cooling coil 2 Special fittings and tubing are in the box of fittings sent with the pump 3 Remove four plugs from bearing end covers 109 and 119 one plug from each sid...

Страница 29: ...ve 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 13 This method is the simplest and particularly for automatic operation the safest A float switch in the suc tion reservoir can be arranged to stop pump should there be failure of liquid supp...

Страница 30: ...on to source of liquid supply centrifugal pump may be primed by pumping liquid into casing until liquid comes out of the open air vent valves As in Sec tion 4 1 Priming on page 27 A2 a In either of these methods a and b the pump will remain primed provided foot valve is tight Any failure however of foot valve when pump is standing idle will permit the pump to lose its prime During long idle period...

Страница 31: ... exhausting 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 Priming by Ejector On suction lift installations an ejector operated by steam compressed air or water under pressure and connected to tapped opening in top of casing can be used to remove ai...

Страница 32: ...d the vacuum switch set to automatically start or stop the primer pump according to the vacuum required to keep the system primed Figure 18 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 G P M to each bearing cooling coil is suffi cient The cooling lin...

Страница 33: ...tween the driver and the pump However at the operating temperature the unit will be in correct horizontal and vertical parallel align ment when a straight edge rests evenly on both halves of coupling rims at four points 90 apart As cautioned in 6 changing alignment in one direction may alter the alignment in another Check through each alignment procedure after making any alignment change 4 5 Dowel...

Страница 34: ...greatly reduced capacities or with discharge gate valve closed be cause the energy required 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 a...

Страница 35: ...e 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 freezing conditions and pump is standing idle liquid in...

Страница 36: ...uction pipe not completely filled with liquid 2 1Speed too low 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 Impeller or suction pipe or opening partially plugged 6 Wrong direction of rotation 7 Air pocket in suction line 8 Stuffing box packing wor...

Страница 37: ...y be too small or long causing excessive friction loss Check with switch gauge 7 Impeller plugged 6 5 Pump takes too much power 1 1Speed too high 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 boxes too tight Pump and driving unit misaligned 5 1Wrong direction of rotation...

Страница 38: ... Shaft bent Rotating parts bind are loose or broken Bearings worn out Pump and driving unit misaligned 6 7 Pump is noisy 36 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 39: ...to remove all old grease displaced through the bearing Replace end covers and add grease through the Alemite fittings as described previously 3 The ball bearing grease should be of a sodium or lithium base NGLI No 2 consistency Do not use graphite 4 The following is the approximate grease capacity for each bearing housing in fluid ounces Group S 2 ounces Group M 3 ounces Group L 4 ounces Oil Lubri...

Страница 40: ...stuffing box This method permits the inspection of the shaft sleeve and the stuffing box bushing If the shaft sleeves are found to be deeply grooved in the packing area they should be replaced as it is only possible for the packing to do an efficient job when the sleeve surface is rela tively smooth 7 2 Repacking stuffing boxes 38 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 41: ...7 3 Sectional view 7 3 Sectional view 3405 3406 3416 Installation Operation and Maintenance Instructions 39 ...

Страница 42: ...7 3 Sectional view 40 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 43: ...eller 1 3 16 Shaft diameter in shaft sleeve 1 1 16 Shaft diameter at coupling end 15 16 Outside diameter of shaft sleeve 1 3 8 General Ball bearing both ends 305 S Max total working pres sure 1 250 PSI Max test pressure 375 PSI Bearing centers 18 3 8 Max shaft HP per 100 RPM 2 57 Temperature limits Max liquid temp without cooling or quenching 180 F Max liquid temp with quenching gland 250 F Max li...

Страница 44: ...0 5 3 5 4 8 3 8 5 7 6 9 1 9 4 11 6 16 5 Stuffing box Stuffing box bore 2 1 2 Stuffing box depth to stuff ing box bush ing 2 13 16 Stuffing box packing size 3 8 x 3 8 Stuffing box no of packing rings 5 Width of lan tern ring Shaft Shaft diameter at impeller 1 9 16 Shaft diameter in shaft sleeve 1 7 16 Shaft diameter at coupling end 1 3 8 Outside diame ter of shaft sleeve 1 3 4 Gener al Ball bearing...

Страница 45: ...2 17G 12x14 12DV 12x14 14DV Pump Weight bronze fitted bare pump 1285 1330 1300 1385 1555 1600 1620 Casing thickness volute 11 16 7 8 7 8 7 8 7 8 1 7 8 15 16 Casing thickness side walls 1 3 16 Max diameter spheri cal solids 13 16 1 7 8 7 8 1 3 4 1 1 11 1 6 1 1 4 1 3 4 Casing capacity gallons 21 0 19 5 24 9 25 0 29 3 33 0 35 5 Stuffing box Stuffing box bore 3 1 4 Stuffing box depth to stuffing box b...

Страница 46: ...ing Grease lube 350 F 1 Any part of which may be suction pressure 2 Water cooled bearings available for model 3405 only Table 6 Typical bronze analysis No Cu Sn Pb Zn P Ni 1102 84 86 4 6 4 6 4 6 1103 87 6 4 5 1 75 05 15 0 75 1106 84 8 8 10 15 1109 88 8 3 4 Symbol 1000 cast iron corresponds to ASTM A278 59T Class 25 Symbol 1003 cast iron corresponds to ASTM A278 59T Class 30 Table 7 Replacement sna...

Страница 47: ... should be preserved and reused at reassembly If lost or damaged they must be replaced by shims 1 64 thick 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 ...

Страница 48: ... ride up on the exposed curved portion of the sled runner keyway Should the impeller key start to ride as the impeller is being removed the key can be driven back by a drift pin or piece of keystock a size smaller than the impeller key 20 Remove key from keyway 21 Unscrew and remove the remaining sleeve from shaft by hand or with a strap wrench Shaft to sleeve threads are right hand This completes...

Страница 49: ...rection 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 on Figure 22 Right hand pump on page 49 for right hand or Figure 21 Left hand pump on page 48 for left hand rotation This dimension must be held as near as possible with the keyways in the shaft and sleeve in align ment For the Model 3416 subst...

Страница 50: ...Figure 21 Left hand pump 7 5 Reassembly of pump 48 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 51: ...Figure 22 Right hand pump 7 5 Reassembly of pump 3405 3406 3416 Installation Operation and Maintenance Instructions 49 ...

Страница 52: ... casing 7 If the impeller diameter has been cut in the field the impeller should be statically balanced and if possible dynamically balanced Balancing can be effected by grinding on the outside of the shrouds near the periphery 8 Place O Ring 412A in groove in end of shaft sleeve 126 Screw shaft sleeve on shaft up to key NOTICE Model 3405 pumps were previously supplied without O rings 412A in the ...

Страница 53: ...ing collar 237 over thrust end of shaft 122 and push up against shaft shoulder 18 The thrust and coupling end ball bearings are the same and can be installed on either end of shaft Both bearings are installed in a like manner as follows Apply a film of oil to the bearing seat on the shaft Start bearing square and drive on about 1 8 keeping bearing square at all times Use a driving sleeve as shown ...

Страница 54: ...urpose draw the puller screw up only finger tight so as not to injure snap ring Locate the cou pling half in the same location on shaft as it was when removed Never drive the coupling on shaft with the bearing end cover 109 in place as this may injure the ball bearing 22 Assemble the pump half coupling on Groups M and L pumps as follows Screw a 1 2 stud ap proximately 1 longer than the length of t...

Страница 55: ...s for free turning by rotating slowly in one direction and then the other The casing wearing rings and the stuffing box bushings should be seated in the lower half casing and should remain stationary when the shaft is rotated If they ride on the impeller or sleeves it may indicate that the bearing housings wearing rings or bushing surfaces in the lower half casing have not been properly cleaned of...

Страница 56: ...erity of serv ice See 7 4 Dismantling of pump on page 45 for disassembly and Section 7 5 Reassembly of pump on page 46 for reassembly of pump The following items should be checked 1 Wearing Ring Clearance The original diametric clearance between the wearing rings and the impeller is 010 to 014 The following is suggested as guide for allowable wear of wearing rings before replacement for 6 pump and...

Страница 57: ...n oil from housing 2 Remove thrust bearing end cover 109 or 109A 3 Remove snap ring 361 4 Remove bearing cap 111 5 Rotate bearing housing 134 134A or 166 180 so that the two locks are on the top 6 Remove ball bearing as directed in 7 4 Dismantling of pump on page 45 Steps 12 through 14 7 Thoroughly flush bearing housing bearing end cover snap ring ball bearing collar and end of shaft with clean ke...

Страница 58: ...ng box gland packing 210 one set for four gland halves 4 Stuffing box gland halves 107 four required With these parts on hand pump can be easily and quickly reconditioned by replacing the worn parts 2 An alternate though not as desirable as that stated above is to have on hand parts that are most likely to wear and which can be used as needed Following is a list of these suggested parts 1 Stuffing...

Страница 59: ...rial number These can all be obtained from the name plate 2 Write plainly the names part numbers and material of the parts required These names and num bers should agree with those on the sectional assembly 7 3 Sectional view on page 39 3 Give the number of parts required 4 Give complete shipping instructions 7 10 Instructions for ordering spare parts 3405 3406 3416 Installation Operation and Main...

Страница 60: ...7 10 Instructions for ordering spare parts 58 3405 3406 3416 Installation Operation and Maintenance Instructions ...

Страница 61: ...ouldspumps com ITT Goulds Pumps Vertical Products Operation 3951 Capitol Avenue City of Industry CA 90601 1734 USA 2020 ITT Corporation The original instruction is in English All non English instructions are translations of the original instruction Form IOM 3405 3406 3416 en US 2020 02 ...

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