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2 Introduction

2.1 Introduction

This instruction manual is intended to assist those involved with the installation, operation, and mainte-
nance of Goulds Model 3935 Multi-Stage Pumps.

It is recommended that this manual be thoroughly reviewed prior to installing or performing any work on
the pump or motor.

2 Introduction

10

Model 3935 Installation, Operation and Maintenance Instructions

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Содержание GOULDS PUMPS 3935

Страница 1: ...Installation Operation and Maintenance Instructions Model 3935 ...

Страница 2: ......

Страница 3: ...peration 14 5 1 Start up 14 5 2 Operational checks 16 5 3 Shutdown procedure 16 6 Preventive and corrective maintenance 17 6 1 Lubrication 17 6 2 Mechanical seal 17 6 3 Vibration 17 6 4 Performance 17 7 Disassembly and reassembly 18 7 1 Disassembly of pump 18 7 2 Inspection and overhaul 19 7 3 Reassembly of power end 19 7 4 S Frame 19 7 5 M L X and Y frames 20 7 6 Reassembly of liquid end 20 7 7 B...

Страница 4: ...9 Spare parts 33 9 1 Ordering spare parts 33 9 2 Instructions for ordering spare parts 33 Table of Contents 2 Model 3935 Installation Operation and Maintenance Instructions ...

Страница 5: ... 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 ab...

Страница 6: ...s 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 Hazard WARNING Indicates the possibilit...

Страница 7: ...G NEVER run pump below recommended minimum flow when dry or without prime WARNING ALWAYS lock out power to the driver before performing pump maintenance WARNING NEVER operate pump 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...

Страница 8: ... of the proper size and material WARNING Replace all corroded fasteners WARNING Ensure all fasteners are properly tightened and there are no missing fasten ers WARNING Startup and Operation When installing in a potentially explosive environment please ensure that the motor is properly certified WARNING Operating pump in reverse rotation may result in contact of metal parts heat generation and brea...

Страница 9: ...d physical injury and or equipment damage Steel toed shoes must be worn at all times WARNING The pump may handle hazardous and or toxic fluids Observe proper decon tamination procedures Proper personal protective equipment should be worn Precautions must be taken to prevent physical injury Pumpage must be han dled and disposed of in conformance with applicable environmental regula tions WARNING Op...

Страница 10: ...s but is not limited to Description of Ex Directives The Ex directives are a specification enforced in Europe and the United Kingdom for electrical and non electrical equipment installed in those locations Ex directives deal with the control of potentially explo sive atmospheres and the standards of equipment and protective systems used within these atmos pheres The relevance of the Ex requirement...

Страница 11: ...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 area where the equipment will be installed If it is not do not operate the equipment and contact your ITT Goulds Pumps sales representative before proceeding II Group 2 G D Gas and Dust present T4 Temperature class can be T1 to T6 see T...

Страница 12: ...d with the installation operation and mainte nance of Goulds Model 3935 Multi Stage Pumps It is recommended that this manual be thoroughly reviewed prior to installing or performing any work on the pump or motor 2 Introduction 10 Model 3935 Installation Operation and Maintenance Instructions ...

Страница 13: ...on manual This pump is not to be operated at speeds working pressures dis charge pressures or temperatures higher than nor used with liquids other than stated in the original or der acknowledgement without written permission of Goulds Pumps Inc 3 3 Receiving inspection shortages Care should be taken when unloading pumps If shipment is not delivered in good order and in accordance with the Bill of ...

Страница 14: ...id might fail a protective device should be incorporated into the system to shut the pump down 4 3 Piping The pump should not run with a closed discharge for more than a few minutes such as during startup or shut down Sufficient heat can be transmitted to the fluid causing the liquid to vaporize and allow the pump to run dry and fail The suction pipe should never be of smaller diameter than the pu...

Страница 15: ...ion is counter clockwise when viewed from the coupling end 4 5 Mechanical seals The pump is equipped with a mechanical seal Damage can result if mechanical seals are run dry or in abrasives For special seals follow the instructions on the seal drawing supplied with the order for recir culation flush and or cooling flows required 4 4 Alignment procedures Model 3935 Installation Operation and Mainte...

Страница 16: ...me check the oiler adjustment The setting dimen sion 14 3 mm 0 56 is illustrated in Figure Dimensional checks b Remove the small plastic plug from the large pipe plug on the left side of frame as viewed from the motor end of the pump NOTICE The Y frame has a 18 NPT tapped hole c The nipple elbow assembly is assembled finger tight at the factory Before installing it on pump the threaded connections...

Страница 17: ...Alignment As described in 4 4 Alignment procedures on page 13 alignment is normally built in and need not be checked 4 Mechanical Seal Refer to 4 5 Mechanical seals on page 13 If auxiliary piping for cooling and or flushing from an out side source is being used establish these flows 5 Priming Pump and suction pipe must be full of liquid before pump is started Usually suction supply will be primed ...

Страница 18: ...low because all the motor horsepower will go into heating the liquid in the pump and damage may result Do not run pump beyond maximum recommended flow since damage could result due to excessive wear on the back washers 546 Table 3 Maximum recommended flow Pump 60 Hertz Speed 50 Hertz Speed BP20 25 GPM 5 6 m3 h 20 GPM 4 5 m3 h BP40 60 GPM 13 6 m3 h 50 GPM 11 4 m3 h BP70 100 GPM 22 m3 h 80 GPM 18 2 ...

Страница 19: ... do not be come clogged 6 3 Vibration It is good practice to periodically monitor vibration of the pump Normally vibration level will be well be low accepted standards Of equal importance is that the vibration level does not increase If a problem with vibration is encountered refer to 8 1 Troubleshooting on page 31 6 4 Performance If performance deteriorates refer to 8 1 Troubleshooting on page 31...

Страница 20: ...e length of the casing 100 10 Note location of casing 0 rings 412K and record 11 Remove the shaft retaining ring 361 and shims 331 from shaft 122 Remove sleeves 157 Mark all parts for reassembly 12 Slide diffusers 150 impellers 101 shims 331 and intermediate bearings 260 off shaft 122 Also note that some pumps may have spacer blanks 150A substituted for some of the stages These will be located at ...

Страница 21: ...eas 7 3 Reassembly of power end Begin reassembly with the bearing frame Refer to instructions for the proper reassembly of individual bearing frames See 7 8 Sectional view on page 27 for identification of bearing frame J Frame 1 Install ball bearing 112 on stub shaft 380 using a driving sleeve or bearing press 2 Lightly oil the bearing housing bore and outer race of the bearing Install stub shaft ...

Страница 22: ...Reassembly of liquid end 1 Bolt seal housing 159 to bearing frame assembly 2 Install O rings 412L on stationary seat mount 158 Lubricate O rings well and press seal seat mount into seal housing 3 Install O ring on stationary seat of mechanical seal 383B Lubricate O ring well and press station ary seat into stationary seal mount 158 4 To install the drive collar 522 and split collet 524 slide the d...

Страница 23: ...he casting adapter fit NOTICE Suction diffusers 150 on the BP20 BP40 BP70 and BP100 pumps are different than the oth er diffusers in each pump In BP200 pumps all diffusers are the same 12 Install first stage impeller 201 on shaft 122 First stage impeller on the BP20 and 200 are the same as other impellers in pump First stage impellers on BP40 BP70 and BP100 are different than other impellers in pu...

Страница 24: ...Figure 4 Dial indicator 7 6 Reassembly of liquid end 22 Model 3935 Installation Operation and Maintenance Instructions ...

Страница 25: ... 152 can result in damage to the pump 21 Plug unused opening in seal housing Openings are required only for special seals Refer to seal drawing for special seals and flushing or cooling requirements 22 Bolt motor to frame 228 or 228A For NEMA 444 TCS and 445 TCS motors an adapter is sup plied 23 Pump is now ready for reinstallation Follow applicable installation lubrication and start up proce dure...

Страница 26: ...on of stacking remove 0 508mm 020 from front of impellers 21 29 35 43 49 57 63 71 and 77 Table 5 BP40 impeller stack clearance BP40 Impeller Stack Required Front Clearance 1st stack 12 stages or less 1 016mm 0 127mm 0 040 0 005 2nd stack 13th to 24th stages 0 635mm 0 127mm 0 025 0 005 3rd stack 25th to 36th stages 0 635mm 0 127mm 0 025 0 005 4th stack 37th to 39th stages 0 889mm 0 127mm 0 030 0 00...

Страница 27: ...f suction side im pellers 25 31 and 35 Table 7 BP100 impeller stack clearance BP 100 Impeller Stack Required Front Clearance 1st stack 8 stages or less 1 016mm 0 127mm 040 005 2nd stack 9th to 16th stages 0 508mm 0 127mm 020 005 3rd stack 17th to 24th stages 0 508mm 0 127mm 020 005 4th stack 25th to 32nd stages 0 635mm 0 127mm 025 005 5th stack 33rd to 40th stages 0 762mm 0 127mm 030 005 6th stack...

Страница 28: ...005 7th stack 25th to 28th stages 0 635mm 0 127mm 025 005 8th stack 29th to 32nd stages 0 635mm 0 127mm 025 005 9th stack 33rd to 36th stages 0 762mm 0 127mm 030 005 10th stack 37th to 40th stages 0 762mm 0 127mm 030 005 11th stack 41st to 44th stages 0 762mm 0 127mm 030 005 12th stack 45th to 48th stages 0 762mm 0 127mm 030 005 NOTICE 1 Steady bearing located between each stack every 14 stages 2 ...

Страница 29: ... L and X Frames The oil lubricated L frame provides high thrust capability as encoun tered in high discharge pressure applications with tandem mounting of angular contact bearings The L frame takes the same motor sizes as the Sand M frames On the X frame an angular contact tandem bear ing arrangement extends NEMA motor capability from 25 HP TEFC to 40 HP OOP Y Frame Foot mounted industrial NEMA mo...

Страница 30: ...ly Cast iron J S M L X 131 Pump foot except BP20 Cast iron S M L X Y 136 Bearing lock nut Steel S M L X Y 168A Ball bearing coupling end Steel 408S 408S 408S 313S 193 Grease fitting Steel zinc plate S 228 Frame grease lube Cast iron J S 228A Frame oil lube Cast iron M L X Y 232 Coupling hub motor Die metal J S M L X Y 233 Coupling hub pump Die metal J S M L X Y 235 Coupling sleeve Rubber J S M L X...

Страница 31: ... 101 Impeller NI Resist Type 1 108 Casing adapter NI Resist Type 2 122 Shaft K Monel 150 Diffuser NI Resist Type 1 150A Spacer blank not shown NI Resist Type 2 151 Suction diffuser NI Resist Type 2 152 Discharge head NI Resist Type 2 157 Spacer sleeve 316 SS 157B Intermed bearing shaft sleeve 316 SS 157C 1st stage shaft seal 316 SS 158 Stationary seal mount NI Resist Type 2 159 Seal housing NI Res...

Страница 32: ...P40 70 and 100 only Figure 5 Optional Flanged Construction Table 11 Optional Flanged Construction Item No Part Name Material 108 Casing adapter Cast carbon steel 152 Discharge head Cast carbon steel 7 10 Pressure temperature capability Table 12 Pressure temperature capability Pressure Working Pressure 105 kg cm2 1500 PSI Maximum Suction Pressure 28 kg cm2 400 PSI Maximum Temperature W 0 Seal Housi...

Страница 33: ...ction head for hot or volatile liquids increase suction head consult factory 10 Foot valve too small install correct size foot valve 11 Foot valve or suction pipe not immersed deep enough consult factory for proper depth Use baf fle to eliminate vortices 12 Entrained air or gases in liquid consult factory 13 Impeller clearance too great check for proper clearance 14 Impeller damaged inspect and re...

Страница 34: ...25 Incorrect bearing frame oil level high or low or lack of grease follow lubrication instructions 8 1 Troubleshooting 32 Model 3935 Installation Operation and Maintenance Instructions ...

Страница 35: ...ces 2 Oil Seals 3 Bearing locknut 4 Bearing lock washer Y frame only 5 Mechanical Seal 6 Casing 0 ring 7 Back washers 8 O rings for seal seat seal mount casing and diffusers Also desirable but more dependent on plant practice is either of the following 1 Complete set of impellers diffusers and thrust washers for the pump or 2 Spare liquid end consisting of everything but the bearing frame 9 2 Inst...

Страница 36: ...35 Modification Relocation of Oiler on Model 3333 3335 3935 Oil Lube Frames History The oiler on Model 3333 3335 3935 oil lube frames was piped to the frame as shown below Var iation in the length of the vertical pipe nipple variation in thread engagement between nipple elbow and oiler or use of an incorrect nipple could cause unpredictable changes in oil level Description Additional tapped openin...

Страница 37: ...nd more information www gouldspumps com ITT Goulds Pumps 240 Fall Street Senenca Falls NY 13148 USA 2022 ITT Corporation The original instruction is in English All non English instructions are translations of the original instruction Form IOM 3935 en US 2022 12 ...

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