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GORMAN-RUPP 12B2-B, Installation, Operation And Maintenance Manual, Page: 1 / 35

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ACDE

OM‐00575‐02

March 28, 1980

Rev. C  10‐25‐2013

THE GORMAN‐RUPP COMPANY 

D

 MANSFIELD, OHIO

www.grpumps.com

GORMAN‐RUPP OF CANADA LIMITED

 

D

 ST. THOMAS, ONTARIO, CANADA

 

    

Printed in U.S.A.

e

1980 The Gorman‐Rupp Company

INSTALLATION, OPERATION,

AND MAINTENANCE MANUAL

WITH PARTS LIST

10 SERIES PUMP

 

MODEL

12B2‐B

Summary of Contents for 12B2-B

Page 1: ...THE GORMAN RUPP COMPANY D MANSFIELD OHIO www grpumps com GORMAN RUPP OF CANADA LIMITED D ST THOMAS ONTARIO CANADA Printed in U S A e1980 The Gorman Rupp Company INSTALLATION OPERATION AND MAINTENANCE MANUAL WITH PARTS LIST 10 SERIES PUMP MODEL 12B2 B ...

Page 2: ...erial number and e mail address required RECORD YOUR PUMP MODEL AND SERIAL NUMBER Please record your pump model and serial number in the spaces provided below Your Gorman Rupp distributor needs this information when you require parts or service Pump Model Serial Number ...

Page 3: ...itioning PAGE B 4 DISCHARGE LINES PAGE B 5 Siphoning PAGE B 5 Valves PAGE B 5 Bypass Lines PAGE B 5 AUTOMATIC AIR RELEASE VALVE PAGE B 6 Air Release Valve Installation PAGE B 6 ALIGNMENT PAGE B 7 Coupled Drives PAGE B 8 V Belt Drives PAGE B 8 V BELT TENSIONING PAGE B 9 General Rules of Tensioning PAGE B 9 Tension Measurement PAGE B 9 OPERATION SECTION C PAGE C 1 PRIMING PAGE C 1 STARTING PAGE C 1 ...

Page 4: ...oval PAGE E 4 Pump Casing Removal PAGE E 5 Impeller Removal PAGE E 5 Seal Removal and Disassembly PAGE E 6 Shaft and Bearing Removal and Disassembly PAGE E 6 Shaft and Bearing Reassembly and Installation PAGE E 7 Seal Reassembly and Installation PAGE E 8 Impeller Installation And Adjustment PAGE E 10 Pump Casing Installation PAGE E 10 Back Cover Installation PAGE E 10 Suction Check Valve Installat...

Page 5: ...tions regarding the pump or its application which are not covered in this man ual or in other literature accompanying this unit please contact your Gorman Rupp distributor or The Gorman Rupp Company The Gorman Rupp Company P O Box 1217 Mansfield Ohio 44901 1217 Phone 419 755 1011 or Gorman Rupp of Canada Limited 70 Burwell Road St Thomas Ontario N5P 3R7 Phone 519 631 2870 The following are used to...

Page 6: ... disconnect the power source to ensure that the pump will remain inoperative 3 Allow the pump to completely cool if overheated 4 Check the temperature before opening any covers plates or plugs 5 Close the suction and discharge valves 6 Vent the pump slowly and cau tiously 7 Drain the pump This pump is designed to handle most non volatile non flammable liquids containing specified entrained solids ...

Page 7: ...burns and injuries If overheating of the pump occurs 1 Stop the pump immediately 2 Ventilate the area 3 Allow the pump to completely cool 4 Check the temperature before opening any covers plates gauges or plugs 5 Vent the pump slowly and cau tiously 6 Refer to instructions in this manual before restarting the pump Do not remove plates covers gauges pipe plugs or fittings from an over heated pump V...

Page 8: ...vel of liquid to be pumped If installed in a flooded suction application where the liquid is supplied to the pump under pressure some of the information such as mounting line configuration and priming must be tailored to the specific application This pump is equipped with a Gorman Rupp double grease lubricated seal therefore the maximum incoming pressure must be limited to 10 p s i For further ass...

Page 9: ...pair or updating policy Do not put the pump into service until appropriate action has been taken POSITIONING PUMP Death or serious personal injury and damage to the pump or components can occur if proper lifting procedures are not observed Make certain that hoists chains slings or cables are in good working condition and of suffi cient capacity and that they are posi tioned so that loads will be b...

Page 10: ...the suction and discharge ports and install the lines Installation closer to the pump may result in erratic readings SUCTION LINES To avoid air pockets which could affect pump prim ing the suction line must be as short and direct as possible When operation involves a suction lift the line must always slope upward to the pump from the source of the liquid being pumped if the line slopes down to the...

Page 11: ...d air to escape from the liquid before it is drawn into the suction inlet If two suction lines are installed in a single sump the flow paths may interact reducing the efficiency of one or both pumps To avoid this position the suction inlets so that they are separated by a dis tance equal to at least 3 times the diameter of the suction pipe Suction Line Positioning The depth of submergence of the s...

Page 12: ...minimize the chance of plugging In low discharge head applications less than 30 feet 9 1 m it is recommended that the bypass line be run back to the wet well and located 6 inches below the water level or cut off point of the low level pump In some installations this bypass outline may be terminated with a six to eight foot 1 8 to 2 4 m length of 1 1 4 inch 31 8 mm I D smooth bore hose air and liqu...

Page 13: ...asing drain plug Use caution when re moving the plug to prevent injury to per sonnel from hot liquid AUTOMATIC AIR RELEASE VALVE When properly installed a Gorman Rupp Auto matic Air Release Valve will permit air to escape through the bypass line and then close automati cally when the pump is fully primed and pumping at full capacity Some leakage 1 to 5 gallons 3 8 to 19 liters per minute will occu...

Page 14: ...s tem do not direct bleeder lines to a common mani fold pipe Contact your Gorman Rupp distributor or the Gorman Rupp Company for information about installation of an Automatic Air Release Valve for your specific application ALIGNMENT The alignment of the pump and its power source is critical for trouble free mechanical operation In either a flexible coupling or V belt driven system the driver and ...

Page 15: ...ng a straightedge across both coupling rims at the top bottom and side When the straightedge rests evenly on both halves of the coupling the coupling is in horizontal parallel alignment If the coupling is misaligned use a feeler gauge between the coupling and the straightedge to measure the amount of misalign ment V Belt Drives When using V belt drives the power source and the pump must be paralle...

Page 16: ...uld require a deflection of 1 inch at the force shown on the Tables for your particular application For example if the span as measured in Figure 5 is 32 inches 813 mm the v belt cross section is C the smallest sheave diameter is 8 inches the pump speed is 1250 RPM and the belts are uncogged Yy T type then 11 5 lbs of force on the tensioner should show 1 2 inch 12 7 mm of deflection A tension test...

Page 17: ...0 500 1740 1741 3000 15 5 14 6 23 4 21 8 17 1 16 8 25 5 25 0 8V 12 5 17 0 200 850 851 1500 33 0 26 8 49 3 39 9 200 850 851 1500 39 6 35 3 59 2 52 7 18 0 22 4 Table 2 Sheave Diameter Millimeters Deflection Force KG Cross Section Smallest Sheave Diameter Range R P M Range Used Belt New Belt Used Belt New Belt Belt Deflection Force Uncogged Hy T Belts Uncogged Hy T Torque Team Cogged Torque Flex Mach...

Page 18: ...sembly Add liquid to the pump casing when 1 The pump is being put into service for the first time 2 The pump has not been used for a consider able length of time 3 The liquid in the pump casing has evapo rated Once the pump casing has been filled the pump will prime and reprime as necessary After filling the pump casing reinstall and tighten the fill plug Do not attempt to operate the pump unless ...

Page 19: ...ll the line slowly and guard against excessive shock pres sure which could damage pipe ends gaskets sprinkler heads and any other fixtures connected to the line When the discharge line is completely filled adjust the throttling valve to the required flow rate Leakage No leakage should be visible at pump mating sur faces or at pump connections or fittings Keep all line connections and fittings tigh...

Page 20: ...atures up to 160_F 71_C are considered normal for bearings and they can operate safely to at least 180_F 82_C Checking bearing temperatures by hand is inaccu rate Bearing temperatures can be measured ac curately by placing a contact type thermometer against the housing Record this temperature for future reference A sudden increase in bearing temperatures is a warning that the bearings are at the p...

Page 21: ...e Air leak in suction line Lining of suction hose collapsed Correct leak Replace suction hose Leaking or worn seal or pump gasket Check pump vacuum Replace leaking or worn seal or gasket Suction lift or discharge head too high Check piping installation and in stall bypass line if needed See INSTALLATION Strainer clogged Check strainer and clean if neces sary Not enough liquid in casing Add liquid ...

Page 22: ...ing s frozen Disassemble pump and check bearing s Liquid solution too thick Dilute if possible Discharge flow too slow Open discharge valve fully to in crease flow rate and run power source at maximum governed speed Suction check valve or foot valve clogged or binding Clean valve EXCESSIVE NOISE Cavitation in pump Impeller clogged or damaged Pump or drive not securely mounted Pumping entrained air...

Page 23: ...ely the same duty cycle the part can be checked and replaced before failure occurs reducing unscheduled down time For new applications a first inspection of wearing parts at 250 hours will give insight into the wear rate for your particular application Subsequent inspec tions should be performed at the intervals shown on the chart below Critical applications should be inspected more frequently Gen...

Page 24: ... with minimum suction lift Since pump installations are seldom identical your performance may be dif ferent due to such factors as viscosity specific gravity elevation temperature and impeller trim If your pump serial number is followed by an N your pump is NOT a standard production model Contact the Gorman Rupp Company to verify per formance or part numbers Pump speed and operating condition poin...

Page 25: ...10 SERIES OM 00575 MAINTENANCE REPAIR PAGE E 2 PARTSPAGE SECTION DRAWING Figure E 1 Pump Model 12B2 B ...

Page 26: ...D C0607 15991 6 33 HEX NUT D06 15991 6 34 SEAL PLATE ASSY 388 10010 1 35 CASING GASKET SET 229G 18000 1 36 CASING DRAIN PLUG P08 15079 1 37 WEAR PLATE ASSY 2917 15990 1 38 HEX NUT D06 15991 2 39 LOCK WASHER J06 15991 2 40 BACK COVER GASKET 8616G 19090 1 41 BACK CVR PLATE ASSY 42111 914 1 42 BACK COVER NOT AVAILABLE 1 43 WARNING PLATE 2613EV 13990 1 44 DRIVE SCREW BM 04 03 17000 4 45 PIPE PLUG P04 ...

Page 27: ...ource representative Before attempting to open or service the pump 1 Familiarize yourself with this man ual 2 Lock out or disconnect the power source to ensure that the pump will remain inoperative 3 Allow the pump to completely cool if overheated 4 Check the temperature before opening any covers plates or plugs 5 Close the suction and discharge valves 6 Vent the pump slowly and cau tiously 7 Drai...

Page 28: ...he power source Immobilize the impeller by wedging a block wood between the vanes If removed install the shaft key 21 Install a lathe dog on the drive end of the shaft 23 with the V notch positioned over the shaft keyway With the impeller rotation still blocked strike the lathe dog sharply in a counterclockwise direction when facing the drive end of the shaft The impel ler may also be loosened by ...

Page 29: ...ll the setscrews Press the oil seal 20 from the bearing retainer and remove the O ring 25 from the pedestal bore Place a block of wood against the impeller end of the shaft and tap the shaft and assembled bear ings 14 and 17 out of the pedestal Press the oil seal 30 from the pedestal bore After removing the shaft and bearings clean and inspect the bearings in place as follows To prevent damage dur...

Page 30: ...s have been installed and allowed to cool check to ensure that they have not moved out of position in shrinking If movement has oc curred use a suitably sized sleeve and a press to reposition the bearings If heating the bearings is not practical use a suit ably sized sleeve and an arbor or hydraulic press to install the bearings on the shaft When installing the bearings onto the shaft never press ...

Page 31: ...ly Handle the seal parts with extreme care to prevent damage Be careful not to contaminate precision finished faces even fingerprints on the faces can shorten seal life If necessary clean the faces with a non oil based solvent and a clean lint free tissue Wipe lightly in a concentric pattern to avoid scratching the faces Inspect the seal components for wear scoring grooves and other damage that mi...

Page 32: ... center the drill in the threaded grease piping hole and not damage the threads Deburr the hole from the inside of the seal liner after drilling Slide the seal plate assembly over the impeller shaft 23 and temporarily secure the seal plate to the pedestal 26 using two capscrews and nuts 3 8 16 UNC x 1 1 2 inch long not supplied Slide the inboard rotating element into the lubri cated seal liner wit...

Page 33: ...asing to the pedes tal Secure the pump casing to the base with the pre viously removed hardware Be sure to reinstall any leveling shims used under the mounting feet of the pump casing Back Cover Installation If the wear plate 37 was removed for replace ment secure it to the cover plate 42 using the at taching hardware 38 and 39 at this time The wear plate must be concentric to prevent binding when...

Page 34: ...gs The pedestal was fully lubricated when shipped from the factory Check the oil level regularly through the sight gauge 27 and maintain it at the middle of the gauge When lubrication is required add SAE No 30 non detergent oil through the hole for the air vent 15 Do not over lubricate Over lu brication can cause the bearings to over heat re sulting in premature bearing failure Under normal condit...

Page 35: ...grpumps com warranty or call U S 419 755 1280 International 1 419 755 1352 For Canadian Warranty Information Please Visit www grcanada com warranty or call 519 631 2870 THE GORMAN RUPP COMPANY D MANSFIELD OHIO GORMAN RUPP OF CANADA LIMITED D ST THOMAS ONTARIO CANADA ...

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