Product Service Manual For DLH12DHT SERIES PUMPS
Contents
1. OUTLET 6 5 4 D UA gt Z Z H T I I a ou f IE KJ d a YA i LI 24 26 TORQUE TO 70 55 5LBFT 75 5 N ml 55 BEARING SPACER IDP 20 ALIGNED WITH SLOT LOCATED TOROUE TO 240 15 LB ET TORQUE TO CER ERA 325 20 N m 240 5 LB FT SF6383 SA 325 20 N m EMBL Y Serer OSU CDLHLIEDBHSLIX 4010 ALLWEILER COT PURITECH HOUTTUIN COLFAX aus Fluid Handling ROSSCOR TUSHACO WARREN Colfax Fluid Handling 1710 Airport Road CERTIFIED Iso 9001 PO Box 5020 gran Monroe NC USA MEM 28111 5020 OMS Tel 1 704 289 6511 Email imo pump colfaxcorp com Accredited by the Council National Accreditation Web www imo pump com rogram for Accreditation RvA CERTIFY 2012 Colfax Fluid Handling all rights reserved 132. 38 5 15 50 TORQUE 105210 LB FT N 190510 LB FT 6 N x H 190 10 LB FT _ 257 21 B 215210 LB FT 230214 N x 44 J 45 43 42 OUTLET INLET 11 FIX 38 TORQUE TO 100 IO LB FT 135 13 N m TORQUE TO 20 2 LB FT 27 3 N m SEN RE 4 TORQUE TO 25 65 5 LB IN 7 5 N m 4 Xe
3. 20 Loosen set screws on mechanical seal rotating assembly body and remove power rotor 17 Remove seal spacer 56 where applicable 10 Remove O ring 83 from inboard cover 8 11 Remove bolts 15 or 55 and washers 91 where applicable and inboard cover 8 from case 1 12 Remove O ring 3 from inboard cover 8 13 Remove idler stop subassembly 11 from inboard cover 8 by removing bolts 14 14 Remove balance piston bushing 9 from inboard cover 8 and tube 13 from inboard cover where applicable 15 Remove stop pin 6 and fastener seal 5 from case 1 16 Remove housing 2 7 from case 1 Remove O ring 3 from housing 2 A CAUTION Do not permit housing 24 to drop as it is removed from pump 17 Remove vent pins 4 from housing 2 or 7 PUMP ASSEMBLY PROCEDURE Note Prior to reassembly of pump all parts should be cleaned and inspected for nicks and burrs Replace all worn or damaged parts Imo Pump recommends replacement of all O rings gaskets mechanical seal and ball bearing when these parts are disturbed from their previously installed positions Coat all parts with light lubricating oil to assist in assembly 10 11 Install O ring 3 in groove of housing 2 Install housing 2 in pump case 1 from suction end of case aligning groove in housing 2 to stop pin 6 hole in case 1 Install stop pin 6 with fastener seal 5 in case 1 I
4. 7 1 Inlet Housing XX 8 1 Inboard Cover 42 1 Seal Return Tubing 9 1 Balance Piston Bushing XX 43 1 Hyd Flareless MPT Fitting 11 1 Idler Stop XX 44 1 72 NPT Nipple Anti Rotation Tube 13 275 and 312 Sizes Only Sak SEA Idler Stop Hex Bolts 14 4 Except 275 and 350 Sizes 46 2 Inlet Idlers XX 15 16 Cover Hex Bolts 8 on 400 Size Only 48 1 Housing Spacer 17 1 Shaft XX 49 2 Thrust Spacer 19 1 Seal X 50 1 Thrust Plate XX 20 1 Seal Seat Adapter 51 1 Thrust Block 23 2 Bearing Snap Rings 52 2 Thrust Plate Capscrews Also Idler Stop Bolts on 275 and 312 Sizes 25 1 Bearing X 53 2 Thrust Block Cap Screws Inboard Cover Hex Capscrews 26 1 Bearing Retainer 55 8 400 Size Only 27 4 Bearing Retainer Capscrews 56 1 Seal Spacer 275 and 312 Sizes Only 29 1 Check Nut 400 Size Only 83 1 Seal Seat Adapter O Ring X Sec Check Nut Setscrew ga a Washers 400 Size Only 275 and 400 Size 3225 530 Only X Minor Repair Kit Items XX Major Repair Kit Items Items marked X are included in Major Repair Kit H PUMP MAINTENANCE A WARNING Failure to observe precautions while installing inspecting and maintaining pump can cause injury to personnel from accidental handling of liguids that may harm skin or clothing or fire hazard risks from flammable liguids or injury from high pressure fluid jets AN DANGER BEFORE working on equipment make sure all power to equipment is disconnected and
5. locked out H 1 GENERAL COMMENTS Refer to assembly drawings for correct pump size for following instructions NOTE Part number identifiers IDP s contained within parenthesis such as 9 refer to circled numbers shown on assembly drawings and Table 2 H 2 TOOLS REQUIRED Procedures described in this manual require common mechanics hand tools a torque wrench dial indicator and suitable lifting device such as slings straps etc H 3 DISASSEMBLY PROCEDURES SPECIAL NOTE To service mechanical seal and ball bearings ONLY perform H 3 Steps 1 and 7 thru 10 and H 4 Steps 6 thru 9 ONLY A CAUTION Fluid leakage from disassembly of pump may make floor slippery and cause personal injury 1 Close suction and discharge piping to pump and disconnect piping Remove seal piping 42 Remove drain plugs 38 and drain unit Remove pump from driver coupling and base plate Remove coupling hub and key 28 On 400 Size pumps remove check nut 29 with setscrew 30 2 Remove capscrews 15 and inlet head 37 3 Remove O ring 36 from inlet head 37 4 Remove capscrews 53 to remove thrust plates 51 amp 50 and spacers 49 Disassemble thrust plate 50 from block 51 by removing capscrews 52 5 Remove spiral rings 35 from grooves in case 1 except on 3225 350 Remove housing spacer 48 6 Remove idlers 46 31 by unscrewing them from inlet end of pump Discha
6. 2 Rotor Size Blank 2D CW D 2D CCW P 1 6D CW 350 Rotor Size Integral Balance Piston Housing and Inboard Cover Blank 2D CW D 2D CCW AN 1 25D CW J 1 5D CW Design Series P 1 6D CW G 1 8D CW 400 Rotor Size Seal Type Blank 2D CW D 2D CCW P 1 6D CW AJ 1 35D CCW H Multi spring A 1 0D CW Material of Construction Blank Iron L Rotor Sizes S Steel 250 312 400 Stationary Seal Seat Material Special Modification T Silicon Carbide E ORDERING INSTRUCTIONS When corresponding with Imo Pump regarding Series DLH12DHT pumps refer to pump nameplate this instruction manual and assembly drawings as instructed below 1 From pump nameplate record pump model number serial number and manufactured date 2 Record instruction manual number revision and date 3 From the assembly drawing and or parts list Table 2 in manual provide IDP number s and names for replacement part s 4 Give above information to your Imo service representative Please call 1 877 853 7867 for further guidance F OPERATION F 1 LIQUID LIMITATIONS Never operate with thin liquids such as solvents or water Pump is designed for liquids having general characteristics of oil F 2 OPERATING LIMITS CAUTION ATTENTION Operating conditions such as speed fluid viscosity temperature inlet pressure discharge pressure filtration duty cycle drive type mounting etc are interrelat
7. 5 Install O ring 36 in groove in inlet head 37 16 Install inlet head 37 using bolts 15 and washers 91 where applicable Torque bolts to value on assembly drawing 17 Install seal piping 42 including fittings if they were removed and drain plugs 38 Note Inlet head 37 can be rotated and repositioned in 90 increments to suit suction piping To change inlet position disconnect seal piping 42 remove bolts 15 and washers 91 where applicable and rotate inlet head to desired position Install bolts 15 and washers 91 where applicable and torque to value on assembly drawing Reconnect seal piping 42 18 Install coupling hub key 28 coupling half and check nut 29 with set screw 30 where applicable Install and align pump and driver as specified in General Instruction Manual SRMO00046 ROTATING RING A RING 4 STATIONARY SEAT DISC 4 SE SEA zi SEAL SEAT ADAPTE Figure 2 9 H TROUBLESHOOTING For assistance with troubleshooting see General Instruction Manual SRM00046 I FIELD AND FACTORY SERVICE AND PARTS Imo Pump maintains a staff of trained service personnel that can provide pump installation pump start up maintenance overhaul and troubleshooting supervision as well as installation and
8. COLFAX Fluid Handling Product Service Manual For DLH12DHT SERIES PUMPS Pump Size Bill of Material Assembly Drawing 275 3217 568 DLH12DHTX 275 Figure3 312 3220 561 DLH12DHT 312 Figure3 3220 567 DLH12DHT 312P Figure 3 350 3222 544 DLH12DHT 350 Figure3 3222 55 DLH12DHT 350G Figure 3 400 3225 531 DLHT2DHST 400P Figure 3 3225 532 DLH12DHST 400AJ Figure 3 3225 534 DLH12DHST 400A Figure 3 3225 535 DLH12DHST 400 Figure 3 3225 530 DLH12DHSTX 400AJ Foure4 3225 533 DLH12DHSTX 400P Fgure3 3225 536 DLH12DHSTX 400P Figure 3 A WARNING This manual and the General Installation Operation Maintenance and Troubleshooting Manual SRM00046 should be read in their entirety prior to installing operating or servicing this pump Manual No SRM00094 Rev 02 15 0407 June 2015 READ ENTIRE PAGE BEFORE PROCEEDING FOR SAFETY OF PERSONNEL AND TO PREVENT DAMAGE TO EQUIPMENT THE FOLLOWING NOMENCLATURE HAS BEEN USED IN THIS MANUAL A DANGER Failure to observe precautions noted in this box can result in severe bodily injury or loss of life A WARNING Failure to observe precautions noted in this box can cause injury to personnel by accidental contact with the equipment or liquids Protection should be provided by the user to prevent accidental contact CAUTION ATTENTION Failure to observe the precautions
9. e accomplished A GENERAL INSTRUCTIONS Instructions found herein cover disassembly assembly and parts identification of Series DLH12DHT pumps NOTE Individual contracts may have specific provisions that vary from this manual Should any questions arise which may not be answered by these instructions refer to General Instructions Manual SRMOOO46 provided with your order For further detailed information and technical assistance please refer to Imo Pump Technical Customer Service Department at 704 289 6511 Manual cannot possibly cover every situation connected with installation operation inspection and maintenance of equipment supplied Every effort was made to prepare text of manual so that engineering and design data is transformed into most easily understood wording Imo Pump must assume personnel assigned to operate and maintain supplied equipment and apply this instruction manual have sufficient technical knowledge and are experienced to apply sound safety and operational practices which may not be otherwise covered by this manual In applications where equipment furnished by Imo Pump is to become part of processing machinery these instructions should be thoroughly reviewed to ensure proper fit of said equipment into overall plant operational procedures A WARNING If installation operation and maintenance instructions are not correctly and strictly followed and observed injury to personnel or serious damage to
10. ed Due to these variable conditions specific application limits may be different from that of operational limitations below Equipment must not be operated without verifying system s operating requirements are within pump s capabilities Under no circumstances are the following operating limits to be exceeded without specific approval from Imo Pump Table 1 Normal Pump Operating and Structural Limits MAXIMUM SPEED sitio etie ttti Dd a du BAE isa 1800 Rpm VISCOSITY ii ai 8 CST 52 SSU Minimum 20 000 SSU 4 315 CST Maximum MINIMUM MAXIMUM LIQUID TEMPERATUEE aaa vka kakaa 0 to 250 F 18 to 121 C MAXIMUM INLET PRESSURE ien PER o oi RUE Duke data 150 psig 10 3 Barg MAXIMUM DISCHARGE PRESSURE sse 2200 psig 151 7 Barg Cont Duty FIETRATION n e ER au a See General Instruction Manual SRMOOO46 DORI s aa it TE a ene ebat ea ei ta ENE TA PIPER PROSO Direct only MOUNTINGu mm Foot or Flange mounted in any attitude G PARTS LIST Table 2 Pump Parts List IDP QTY DESCRIPTION KIT IDP QTY DESCRIPTION KIT 1 1 Case 31 2 Discharge Idlers XX 2 1 Discharge Housing XX 35 2 Housing Snap Rings XX 3 2 Housing and Inboard X 36 1 Inlet O Ring X Cover O Ring 4 2 Vent Pins 37 1 Inlet 5 1 Fastener Seal X 38 2 Drain Plugs 6 1 Stop Pin 41 1 90 elbow tube to MNPT
11. groove of power rotor 17 f Position shaft 17 in arbor press with helix end of power rotor on the press Press ball bearing 25 on power rotor 17 pressing only on inner race of ball bearing 25 until it is located against inner retaining ring 23 g Install outer retaining ring 23 in groove of power rotor 17 h Tighten mechanical seal rotating assembly see figure 2 setscrews Install O ring 83 to inboard cover 8 counter bore A small amount of grease may be applied to hold the O ring 83 in place Install assembled power rotor 17 in pump centering all parts as they enter inboard cover 8 Align one of openings in seat seal adapter 20 over drain in inboard cover 8 Install bearing retainer 26 to inboard cover 8 using bolts 27 Torque cap screws 27 to value on appropriate assembly drawing Install idlers 31 and then 46 into rotor housings 2 7 by meshing threads with power rotor thread and screwing them into housing idler bores 8 12 Install spacer 48 in pump case 1 bore and position next to housing 7 13 Install spiral rings 35 in groove in pump case 1 bore not required on BM 3225 530 14 Assemble thrust plate and block 50 amp 51 with capscrews 52 Torque cap screws 52 to value on assembly drawing Install spacers 49 and thrust plate assembly to housing 7 using cap screws 53 Torque cap screws 53 to value depending on pump size on appropriate assembly drawing 1
12. maintenance training Our factories provide maintenance as well as overhaul and test facilities in event user prefers to return pumps for inspection or overhaul Factory overhauled pumps are normally tested and warranted as new for a period of one year from date of shipment For either field service or factory overhaul assistance contact your local Imo Sales Office or representative at Technical Customer Service Department in Monroe NC USA 1 877 853 7867 Most pumps have repair kits available Minor Repair Kits are used to repair leaking seals bad bearings and or for re assembly after pump tear down They include as applicable pump shaft seals packing all gaskets O rings and bearings Major Repair Kits are sufficient to rebuild completely worn out pumps to as new condition They include all parts found in Minor Repair Kits plus all major internal parts subject to wear Since kits have all necessary parts kit purchase is preferred rather than selecting individual parts When parts are individually selected from Parts List some needed components are often overlooked In addition mixing worn or used parts with new parts risks rapid wear and shortened service life from new parts 10 SAS Ere U N is z CG 3 312 eoe 350
13. noted in this box can cause damage or failure of the equipment Non compliance of safety Safety instructions where Safety instructions which shall be instructions identified by the electrical safety is considered for reasons of safe following symbol could affect involved are identified by operation of the pump and or safety for persons protection of the pump itself are marked by the sign A ATTENTION CONTENTS SAFETY AND TABLE OF CONTENTS A 2 A GENERAL INSTRUCTIONS ean eR ec ere et bn de to tao t nce tane 3 B INTRODUCTION d 3 C DESCRIPTION OF PUMP FEATURES et dis od da 3 D PUMP MODEL IDENTIFICATION rettet tn etn hec rtt 4 E ORDERING INSTRUCTIONS sche tiis tir em eet ota ien acie Cdi 4 E OPERATION Mc 4 G EES eege a a djeva dg A ieu 5 H PUMP MAINTENANCE Assembly and Disassembly 6 l TROUBLESHOOTING crei reet ett res a Rent ERR e e eden eee ke pan RE Una 10 J FIELD AND FACTORY SERVICE AND PARTS seen 10 K ASSEMBLY DRAWINGS gt eret Eege bs veces ner RE E eda ree kh EC 11 12 ATTENTION If operation of pump is critical to your business we strongly recommend you keep a spare pump or major repair kit in stock at all times As a minimum a minor repair kit o rings gaskets shaft seal and bearings should be kept in stock so pump refurbishment after internal inspection can b
14. nstall vent pins 4 in housing 7 and housing 7 in pump case 1 from suction end being sure vent pins 4 line up with vent pin holes in housing 2 Install balance piston bushing 9 in bore of inboard cover 8 Install idler stop 11 on inboard cover 8 with capscrews 14 Torque cap screws 15 to value on appropriate assembly drawing Install tube 13 on inboard cover 8 where applicable Install O ring 3 in inboard cover 8 Install inboard cover 8 in case 1 Be sure vent return hole 41 in inboard cover 8 is facing up and tube 13 mates with hole in housing 2 Secure with cap screws 15 or 55 and washers 91 where applicable Torque cap screws to value on appropriate assembly drawing Assemble mechanical seal 19 See figure 2 below and ball bearing 25 as follows a Install O ring in groove of mechanical seal 19 stationary seat Install mechanical stationary seat in mechanical seal seat adapter 20 ensuring that spring pin is properly positioned to engage slot in seal seat b Install seal spacer 56 where applicable and then mechanical seal 25 rotating assembly on power rotor 17 c Wipe mechanical seal rotating and stationary faces with a clean lint free cloth before assembling faces together d Install assembled seal seat adapter 20 on power rotor shaft and carefully place the mechanical seal stationary face on the mechanical seal rotating face e Install inner retaining ring 23 in
15. pump could result Imo Pump cannot accept responsibility for unsatisfactory performance or damage resulting from failure to comply with instructions B INTRODUCTION This instruction manual covers Series DLH12DHT Imo pumps This series of pumps has been designed for use in high pressure crude oil applications including those at low viscosities Model and design construction of each pump can be identified by designator code on pump nameplate Definitions of model designators are identified in Figure 1 C DESCRIPTION OF PUMP FEATURES DLH12DHT Series pumps are positive displacement rotary screw pumps consisting of precision bored housing that encloses a driven screw power rotor and four intermeshing following screws idler rotors These screws when rotating form a succession of closures or cavities As they rotate fluid is moved axially from inlet port to outlet port in a continuous uniform flow with minimum fluid pulsation and pump noise Pumps contain a sealed grease packed ball bearing and carbide thrust and carbide balance piston bushing for extended wear in contaminated fluids D PUMP MODEL IDENTIFICATION Instruction manual covers Imo Series DLH12DHT pumps Model of each pump is identified on pump nameplate Figure 1 Model Designator Definitions D L H 12D H S T X 400 P Carbide Thrust al Block Lead and Rotation 275 Rotor Size Bi Metal Babbitt Blank 2D CW D 2D CCW Housings E 1 7D CW 31
16. rge idlers 31 may be removed by rotating pump counterclockwise A CAUTION Do not permit idlers 46 31 to drop as they emerge from housing 24 6 H 4 Remove bolts 27 and bearing retainer 26 Remove assembled power rotor 17 Removal of power rotor 17 includes removal of retaining rings 23 ball bearing 25 mechanical seal 19 seal seat adapter 20 and seal spacer 56 where applicable a Disassemble power rotor 17 as follows See figure 2 for seal drawing Using a flat nosed tool such as a screw driver remove retaining rings 23 located on both sides of ball bearing 25 from their grooves in power rotor 17 Sealed ball bearing 25 is assembled to power rotor 17 with a light press fit Ball bearing 25 may be removed by using a bearing puller or a vertical arbor press When using press two pieces of key stock are to be placed through openings of seal seat adapter 20 underneath ball bearing 25 on both sides of power rotor shaft Key stock should be long enough to support power rotor 17 as it is placed in press Press ram is to be positioned against power rotor 17 coupling end face Gently press power rotor 17 through ball bearing 25 Ensure power rotor 17 does not fall to floor once ball bearing 25 is off of its diameter Remove mechanical seal stationary seal seat adapter 20 from power rotor 17 shaft Remove mechanical seal stationary sealing face from adapter
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