PRODUCT SERVICE MANUAL For BK12DXZC
Contents
1. Remove housings 24 73 from case 1 and O ring 28 from housing 24 CAUTION Do not permit housings 24 72 to drop as it is removed from pump Remove tube 26 from housing 24 or 73 and O rings 27 from tube 26 Remove aligning vent pins 3 from housing 24 or 73 PUMP ASSEMBLY PROCEDURE Note1 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 9 27 28 36 83 and 85 Dyna Seal 7 mechanical seal 25 seal sleeves 38 and 39 and ball bearing 49 when these parts are disturbed from their previously installed positions Coat all parts with light lubricating oil to assist in assembly Note2 Bolts 81 have Nylok threads Torque stated on appropriate assembly drawing for bolt 81 does not include additional torque to install fasteners containing nylok inserts Torque required for first application is much higher than for subsequent applications To ensure required preload on Nylok fastener is achieved for each application following procedure is mandatory assembly practice 1 Using suitable torque wrench install fastener in mating piece until Nylok insert is completely engaged Note torque required 2 Add torque measured in step1 to torque value on assembly drawing 3 Complete tightening fastener to torque value determined in 2 Install O ring 28 in groove of discharge housing 22. General Instruction Manual SRM00046 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 maintenance training Our factories provide maintenance as well as overhaul and test facilities in the event user prefers to return pumps for inspection or overhaul Pumps that have been factory overhauled 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 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 it is preferred that they be purchased 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 servic
3. and oil balance tube 92 with O rings 27 by removing hex bolts 91 and thrust spacers 90 Remove O rings 27 from tube 92 Remove cups 23 from suction idlers 21 Remove suction idlers 21 by unscrewing them from inlet end of pump Remove remaining idlers 35 from housings 73 24 by rotating power rotor 63 in a counter clockwise direction CAUTION Do not permit idlers 21 35 to drop as they emerge from housings 73 24 Remove bolts 47 and bearing retainer 43 If bearing retainer is difficult to remove it can be jacked off using 2 3 5 long 3 8 hex head bolts supplied in major and minor kits Remove tubes 85 with O rings 40 from bearing retainer 43 or inboard cover 46 Remove O rings 85 from tubes 40 Remove seal stationary seat from bearing retainer 43 and O rings from seal stationary seat Remove O ring 83 from bearing retainer 43 6 7 Remove assembled power rotor 63 from pump Helix end of power rotor can be hammered with a dead blow hammer to dislodge power rotor if necessary Removal of power rotor 63 includes removal of Truarc ring 42 ball bearing 49 seal sleeves 38 and 39 with seals 25 O rings 36 and seal seat adapter 48 8 Disassemble power rotor 63 as follows See assembly drawing and Figure 2 N a EE IN KINA e BSS EE ki 4 AA Figure 2 a Remove V Ring 93 and truarc ring 42 from shaft 63 Loosen set scre
4. 4 Install discharge housing 24 in pump case 1 from suction end of case aligning groove in housing 24 to stop pin hole in case 1 Install stop pin 6 with Dyna Seal 7 in case 1 Install O rings 27 on oil balance tube 26 and oil balance tube 26 in discharge end of inlet housing 73 Install vent pins 3 in same end of inlet housing 73 Install assembled inlet housing 73 in case 1 ensuring that oil balance tube 26 and vent pins 3 engage holes in discharge housing 24 8 Install housing snap rings 8 in case 1 Install balance piston 79 on inboard cover 46 Install idler stop 22 on inboard cover 46 with cap screws 81 Torque cap screws to value on assembly drawing Also see note 2 above for correct torque on these capscrews since they have nylok threads Install O ring 9 on inboard cover 46 Install inboard cover 46 on case 1 using bolts 4 Be sure seal return line 70 is facing up Torque bolts to value on assembly drawing Assemble power rotor 63 as follows See assembly drawing and Figure 2 MER OU AN H S lap ZO LZ RET TAX dM EN FETE S SA SES ES Figure 2 a Install O ring in groove of mechanical seal 25 stationary seat of inlet facing seal and O ring 83 on OD of seal seat adapter 48 Install mechanical seal stationary seat with installed O ring in seal seat adapter 48 ensuring that spring pin is properly positioned to engage slot i
5. COLPMA Fluid Handling PRODUCT SERVICE MANUAL For BK12DXZC 250P PUMP BM 3215 572 A WARNING This manual General Installation and Troubleshooting Manual SRM00046 should be read thoroughly prior to pump installation operation and maintenance Manual No SRM00120 Rev 00 JULY 2013 Imo Pump 1710 Airport Road PO Box 5020 Monroe NC USA 28111 5020 Tel 1 704 289 6511 Email cc colfaxcorp com Web colfaxcorp com ALLWEILER COT PURITECH HOUTTUIN IMO LSC ROSSCOR TUSHACO WARREN READ ENTIRE PAGE BEFORE PROCEEDING FOR THE 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 equipment or liquids Protection should be provided by user to prevent accidental contact CAUTION ATTENTION Failure to observe precautions noted in this box can cause damage or failure of equipment Non compliance of safety Safety instructions where Safety instructions which instructions identified by electrical safety is shall be considered for the following symbol involved are identified by reasons of safe operation could affect safety f
6. S enn l 224242 SSN LA SECTION D D gt ANSI RAB e MIN M L KR up Accredited by the Council National Accreditation Program for Accreditation RvA Wr COLFAX Fluid Handling Imo Pump 1710 Airport Road PO Box 5020 Monroe NC USA 28111 5020 Tel 1 704 289 6511 Toll 1 877 853 7867 Email cc colfaxcorp com Web colfaxcorp com O 2012 Colfax Fluid Handling all rights reserved ALLWEILER COT PURITECH HOUTTUIN IMO LSC ROSSCOR TUSHACO WARREN 13
7. TURE onsaiisseeeeeee 0 to 200 F 18 to 121 C MAXIMUM INLET PRESSURE etes retreat 150 psig 910 3 BARg MAXIMUM DISCHARGE PRESSURE 2200 psig 157 BARg Cont Duty FILTRATION nnn See General Instruction Manual SRM00046 BRIVE etd etae ee kk e ae ge oak te esi AUN up kn ea UE Direct only UOS NIIS cu OS 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 39 1 Shaft Sleeve X 2 1 Inlet Head 40 2 Oil Balance Tubes 3 2 Vent Pin XX 42 1 Bearing Retaining Ring X 4 8 Cover Bolts 43 1 Bearing Retainer 6 1 Stop Pin XX 46 1 Inboard Cover 7 1 Dyna Seal X 47 4 Bearing Retaining Bolt 8 2 Housing Retaining Ring XX 48 1 Seal Seat Adapter 9 2 Cover O rings X 49 1 Ball Bearing X 11 8 1 4 20 Set Screws X 63 1 Power Rotor XX 21 2 Suction Idler XX 67 2 Pipe Plug 22 1 Idler Stop XX 70 1 Elbow 23 2 Cups XX 71 1 Tubing 24 1 Discharge Housing XX 73 1 Suction Housing XX 25 1 Seal X 74 1 Elbow 250 Only 26 1 Tube 79 1 Floating BP Bushing XX 27 4 Tube O Ring X 81 2 Idler Stop Cap Screw 28 1 Housing O Ring X 83 2 Seal Seat O Ring X 29 1 Thrust Plate XX 85 4 Tube O Rings X 31 1 Key 90 2 Thrust Plate Spacers 35 2 Discharge Idlers XX 91 2 Thrust Plate Bolts 36 2 Shaft Sleeve O Rings X 92 1 Thrust Balance Tube 38 1 Shaft Sleeve A X Minor Repair Kit Items XX Major Repair Kit Items Items marked X are included i
8. d and screwing them into housing idler bores Install cups 23 to ends of suction idlers 21 Install O rings 27 on oil balance tube 92 and oil balance tube 92 in inlet housing 73 Install thrust plate 29 to pump case 1 with spacers 90 and thrust plate bolts 91 ensuring that pin hole in thrust plate 29 engages tube 92 in suction housing 73 Torque bolts to proper value on assembly drawing Install O ring 9 to groove in inlet head 2 10 16 Install inlet head 2 using bolts 4 Torque bolts to proper value on assembly drawing 17 Install seal piping 71 and drain plugs 67 Note Inlet head 2 can be rotated and repositioned in 90 increments to suit suction piping To change inlet position disconnect seal piping 71 remove bolts 4 and rotate inlet head to desired position Install bolts 4 and Torque bolts to proper value on assembly drawing Reconnect seal piping 71 18 Install coupling hub key 31 Install and align pump and driver as specified in General Instruction Manual SRM00046 H 5 SPECIAL TESTING INSTRUCTIONS After pump has been reassembled with a major kit it is recommended that a break in test be performed to allow idlers to polish into Babbitt housing bores For this test pump should be run to maximum required working pressure starting from 300 psig in 200 psig increments holding each pressure for five minutes TROUBLESHOOTING For assistance with troubleshooting see
9. e life from new parts 11 TORQUE TO 30 2 LB FT 4043 N m A N alg SN m a BN pf lls AVZZLZLZLLLLLLALL LLL TORQUE TO 200 I0 LB FT 270414 N m AE LAL LL LL La NI i Ek AD 7 er Cer VE ALATA LLL AZA Nu EE MEN pe a A SH CENTER IN IDP 35 TO BE 35 IN THIS LOCATION AN n V MAU FAI EL LIL TATA TAA TAILLE 727727294 N Va Um IMs ARS RRRS SS S999 A NF SC L a 8 N H 77 e 7f SL P LI NS TORQUE TO TORQUE TO A 285 5 LB FT 25 2LBFT a 388 20 N m 3443 N m SECTION B B a INLET SEAL CHAMBER FLUSH TORQUE TO 28 e 50 5 LB FT 70 SUPE Er e 68 7 N m vr SECTION A A 2 COOLANT LUBRICANT MUST BE EXTERNALLY SUPPLIED TO THE SEAL WITH EITHER A SEPARATE CIRCULATING SYSTEM WHICH DELIVERS NO LESS THAN 2 GPM TO THE SEAL OR A SUITABLE SEAL POT IF A SEAL POT IS USED THE SEAL POT PRESSURE MUST BE APPROXIMATELY 20 PSIG ABOVE PUMP SUCTION PRESSURE TO PREVENT PUMPED FLUID FROM GETTING INTO THE SEAL POT FLUID USED TO COOL LUBRICATE THE SEAL MUST BE COMPATIBLE WITH THE PUMPED FLUID BECAUSE IF A SEAL LEAK OCCURS THE SEAL COOLING FLUID WILL BE MIXED WITH THE PUMPED FLUID BKI2DXZC 250 ASSEMBLY 510 LBS gt L7 gt N NN MEO SENS aai SN CZ ess SCH Ene o DA OUTLET SEAL dl CHAMBER FLUSH ET SEAL LEAK A DETECTION HOLE pS AAA SC NZI EE 277 SN Yea ZAN ZAN N lt ZZAZZ S
10. l applications 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 EQUIPMENT BK12DXZC 250_ pump is positive displacement rotary screw pumps consisting of precision bored housings with Babbitt liners that enclose a hardened alloy steel drive screw power rotor and four intermeshing following hardened alloy steel 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 These pumps have a duel seal system with a pressurized barrier fluid to prevent external leakage of pumped fluid D PUMP MODEL IDENTIFICATION This instruction manual covers Imo BK12DXZC 250 pump The model of each pump is identified on pump nameplate Refer to Figure 1 and Table 2 for instructional keys when using this manual B K 12D X Z C 250 P Design e ona Modification P 1 6 D EN G 1 8D CW Fuel Pump Power Rotor Diameter 250 Series C Circular Mounting Flange X Double Seal with Pressurized Barrier Fluid High Pressure Fuel Pump FIGURE 1 E ORDERING INSTRUCTIONS When corresponding with Imo Pump regarding BK12DXZC 250 pumps refer to pump nameplate this instruction manual and assembly drawing as in
11. n 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 liquids that may harm skin or clothing or fire hazard risks from flammable liquids or injury from high pressure fluid jets BEFORE working on equipment make sure all power to equipment is disconnected and locked out A DANGER H 1 GENERAL COMMENTS NOTE Part number identifiers IDP s contained within parenthesis such as 10 refer to circled numbers shown on assembly drawing figure 2 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 See Figure 2 on next page and assembly drawing SPECIAL NOTE To service mechanical seal and ball bearings ONLY perform H 3 Steps 1 6 7 and 8 and H 4 Steps 8 9 and 10 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 remove pipe plugs 67 to drain unit Remove seal piping 71 Remove pump from driver coupling and base plate Remove coupling hub and key 31 Remove bolts 4 and inlet head 2 Remove O ring 9 from inlet head 2 Remove thrust plate 29
12. n seal seat b Install O ring 36 in groove in shaft 63 Install seal seat adapter 48 with seal stationary seat on shaft 63 Seal seat adapter 48 will fit loosely Wipe stationary seal seat in seal seat adapter with a clean lint free cloth and alcohol c Install rotating seat of inlet facing seal into seal sleeve 38 and tighten rotating seal seat set screw Be sure rotating seat is hard up against seal sleeve 38 before tightening set screw Wipe rotating seat seal seat adapter with a clean lint free cloth and alcohol 9 13 14 15 d Install seal sleeve 38 with installed seal rotating seat on power rotor 63 under seal seat adapter 48 being careful not to damage stationary seal seat in seal seat adapter 48 Seal seat adapter 48 should still move around loosely e Install ball bearing 49 on shaft 63 pressing only on inner race until it seats tightly against seal spacer 38 Tighten set screw 11 in seal spacer 38 Install outer O ring 36 on shaft f Install seal spacer 39 on shaft 63 Tighten set screw 11 on seal spacer 39 g Install rotating seal seat of shaft side seal onto seal spacer 39 Tighten setscrews in rotating seal seat of shaft facing seal Be sure rotating seat is hard up against seal sleeve 38 before tightening set screw h Install snap ring 42 and V ring 93 on shaft 63 Install O ring in stationary seat of shaft facing seal and install stationary seat in bearing
13. or of the pump and or persons protection of the pump itself are marked by the sign A A ATTENTION CONTENTS SAFETY AND TABLE OF CONTENTS eene eren 2 A GENERAL INSTRUGCTIONS actore tette et kota sd kota oye do bo kl banou redo 3 B INTRODUCTION ia e a aa a E a N a AAE 3 C DESCRIPTION OF THE PDMP eror roo HERD bab tea dee 3 D PUMP MODEL IDENTIFICATION eere deeg keeten ern dek rns H E OBDEHINGINSTB GTIONS 25 3 65 teat kon te ett e e ebe 4 Fe TRE RULING coarse La D Le d LP La RAE 4 Ge MPARISIEIST ote eka no ES 5 H PUMP MAINTENANCE Disassembly and Aezsembiv 6 l SPECIAL TESTING INSTRHGTION Si si y k recenti oret tetro ean de v rek re erre 11 Jd TROUBLESHOOTING erede dopo eta cu itc E 11 K FIELD AND FACTORY SERVICE AND PARTS sse 11 Ls ASSEMBLY DRAWING s ado five ao el tuentur 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 be accomplished A GENERAL INSTRUCTIONS Instructions found herein cover disassembly assembly and parts identification of the BK12DXZC 250 pump NOTE Individual contracts may have specific provisions that vary from this manual Should any questions arise which may not be answered by the
14. retainer 43 being sure pin in bearing retainer 43 mates to slot in stationary seat Install O ring 83 on bearing retainer 43 Install power rotor into pump as below Note For ease of power rotor installation pump can be turned in a vertical position with discharge end facing up End of power rotor is drilled and tapped for eye bolt included in both major and minor kits to facilitate the vertical assembly CAUTION When installing assembled shaft 63 in pump be sure that stationary seal seat in bearing retainer 43 is square and up against rotating seal seat on shaft 63 and that seal seat adapter 48 is centered in inboard cover 46 to prevent damage to seal faces a Install assembled power rotor 63 in pump centering all parts as they enter inboard cover 46 until stationary seal seat 48 contacts step in inboard cover 46 b Wipe shaft facing seal faces with a clean lint free cloth and alcohol c Install bearing retainer 43 with stationary seal seat already installed carefully against rotating seal seat on power rotor 63 and jack power rotor 63 into inboard cover 46 with bearing retainer using 2 3 5 long 3 8 hex head bolts supplied in major and minor kits until power rotor is up against step in inboard cover 46 Replace 3 5 long bolts with 2 1 2 long bolts IDP 47 Torque bolts to proper value on assembly drawing Install idlers 35 21 into housings by meshing threads with power rotor threa
15. se 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 This 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 pump could result Imo Pump cannot accept responsibility for unsatisfactory performance or damage resulting from failure to comply with instructions B INTRODUCTION Instruction manual covers BK12DXZC 250 pump This series of pumps has been designed for use in high pressure fuel oi
16. structed below 1 From pump nameplate record pump model number serial number and manufactured date 2 Record instruction manual number revision and date 3 From 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 Imo sales and service representatives are listed herein and in General Instruction Manual SRM00046 F OPERATION F 1 LIQUID LIMITATIONS Never operate on water The pump is designed for liquids having general characteristics of fuel oil or 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 interrelated Due to these variable conditions specific application limits may be different from that of operational limitations 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 OI E OR RE 3600 RPM VISCOSITY a eae ee at ions 8 cSt Minimum 3000 SSU 650 cSt Maximum MINIMUM MAXIMUM LIQUID TEMPERA
17. w 11 in coupling side seal sleeve 39 and remove seal sleeve 39 Loosen set screw in coupling side rotating seal seat 25 and remove coupling side rotating seal seat 25 from seal sleeve 39 Remove seal sleeve O ring 36 b Pull ball bearing 49 off shaft 63 with bearing puller or press it off using a vertical arbor press When using press rest bearing face 49 on two pieces of key stock Gently press on coupling end of power rotor 63 until bearing 49 comes loose CAUTION Ensure that power rotor 63 does not fall to floor when ball bearing 49 is removed c Loosen set screw 11 in pump side seal sleeve 38 and remove pump side seal sleeve 38 with installed pump side rotating seal seat 25 Loosen set screw on installed pump side rotating seal seat 25 and remove pump side rotating seal seat 25 from seal sleeve 38 H 4 1 7 18 d Remove seal seat adapter 48 from power rotor 63 Remove O ring 83 from seal seat adapter 48 Remove O ring 36 from shaft under pump side seal sleeve 38 Remove seal stationary seat from seal seat adapter 48 Remove bolts 4 and inboard cover 46 from case 1 Remove O ring 9 from inboard cover 46 Remove idler stop 22 from inboard cover 46 by removing bolts 81 Remove floating balance piston 79 from inboard cover 46 Remove stop pin 6 and Dyna seal 7 from case 1 Remove housing snap rings 8 from case 1
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