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FEDCO MSS Series Overhaul Manual

Mutli-stage seawater high pressure pumps
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MSS Series Pumps
Register the product warranty at the time of installation by completing the
Warranty Registration Form at the rear of this manual and fax or e-mail it to FEDCO.
ATTN: Field Service Department
FEDCO
800 Ternes Drive
Monroe, MI 48162
USA
!
IMPORTANT: FOR REASONS OF SAFETY AND MAINTENANCE, ONE COPY OF
THIS MANUAL MUST REMAIN WITH THE EQUIPMENT AT ALL TIMES.
Copyright © 2009 Fluid Equipment Development Company Version – MSS 2.3 Last revised: 06/2011
MUTLI-STAGE SEAWATER (MSS)
HIGH PRESSURE PUMPS
Overhaul Manual
Models: MSS-15 ● MSS-20 ● MSS-30
Additional Contact Information:
Tel
734-241-3935
Fax
734-241-5173
Web site:
www.fedco-usa.com
Choose the "Service and Support" tab
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Summary of Contents for FEDCO MSS Series

  • Page 1 Models: MSS-15 ● MSS-20 ● MSS-30 Register the product warranty at the time of installation by completing the Warranty Registration Form at the rear of this manual and fax or e-mail it to FEDCO. ATTN: Field Service Department Additional Contact Information:...

  • Page 2: Table Of Contents

    MSS Series Pumps Table of Contents Theory and Operation .............. 3 MSS Pump External Components ........3 MSS Pump Internal Components ......... 4 Overhaul Procedures .............. 5 Warnings and Safety Precautions ........5 User Health and Safety ............6 In The Work Area ..............6...

  • Page 3: Theory And Operation

    MSS Series Pumps Theory and Operation MSS Pump External Components Motors are selected according to equipment operating re- Multi-stage stainless (MSS) pumps are centrifugal feed quirements (Figure 1). A flexible coupling allows the pump pumps specifically designed for brackish and seawater shaft to float within the coupling reducing thrust against reverse osmosis (SWRO) service.

  • Page 4: Mss Pump Internal Components

    MSS Series Pumps Theory and Operation (cont.) The balance disc rides in the bearing carrier and serves as a thrust bearing for the pump. This unique design uses MSS Pump Internal Components patented WATER BEARING™ technology which allows feed water cool and lubricate the disc. Because the bal-...

  • Page 5: Overhaul Procedures

    Overhaul Procedures Warnings and Safety Precautions Safety practices and precautions for the operation and maintenance of all FEDCO Pump Products MUST BE FOLLOWED. This information supplements oral or written instructions that may be received. Safety MUST be prac- ticed as part of the standard operating procedures for this equipment during any installation and operation.

  • Page 6: User Health And Safety

    User Health and Safety This includes any modification to the equipment or the use of parts not provided by FEDCO. If there is a ques- Safety Equipment should be used in accordance with tion regarding the intended use of the equipment, please company regulations.

  • Page 7: Lifting And Handling

    MSS Series Pumps Overhaul Procedures (cont.) Lifting and Handling CAUTION Observe all lifting precautions. Failure to follow all lifting and handling precautions may result in serious inju- ry! Unit weight is listed on the unit nameplate. Determine the weight of the unit to select an appropriate lifting method.
  • Page 8 MSS Series Pumps Overhaul Procedures (cont.) CAUTION Whenever possible, all components should be lifted and moved separately for safety. Do not lift the pump up by the shaft. If the unit is lifted by the shaft, damage may occur. Lifting and handling of the motor must be performed according manufacturers instructions.

  • Page 9: Pump Overhaul

    MSS Series Pumps Pump Overhaul ELECTRICAL HAZARD Make sure to disconnect the power supply to the motor before carrying out component replacement procedures. Follow all Lock out/Tag out procedures developed by your company before starting any maintenance or repair. —...
  • Page 10 MSS Series Pumps Pump Overhaul (cont.) 6. Disconnect drain line(s) from inlet housing or high pressure seal carrier (Figure 11). Figure 11 Disconnecting Drain Lines 7. Remove top cradle (Figure 12). Figure 12 Removing Top Cradle 8. Remove anchor bolts and washers from shell support bracket(s) (Figure 13).
  • Page 11 MSS Series Pumps Pump Overhaul (cont.) 9. Remove shell support bracket flange bolts, washers and shell support brackets (Figure 14). Figure 14 Removing Flange Bolts from Support Brackets 10. Remove eight (8) screws and coupling guards (Figure 15). Figure 15 Removing Coupling Guards 11.
  • Page 12 MSS Series Pumps Pump Overhaul (cont.) 12. Remove motor adapter bolts and washers (Figure 17). Figure 17 Removing Motor Adapter Bolts 13. Install alignment pins to prevent damage to mechanical seal and carefully slide pump from motor (Figure 18). 30.5 cm (12”...
  • Page 13 MSS Series Pumps Pump Overhaul (cont.) 15. Support pump shaft with an adjustable gage block or other suitable fixture (Figure 20). ADJUSTABLE NOTE: The pump must be assembled with the shaft GUAGE BLOCK in its correct position. A gage block will ensure assembly in the same position it was disassembled.
  • Page 14 MSS Series Pumps Pump Overhaul (cont.) 18. Remove discharge housing (Figure 23). Figure 23 Removing Discharge Housing 19. Remove cavity cover (Figure 24). NOTE: Do not discard O-ring. Figure 24 Removing Cavity Cover 20. Use a keyed shaft wrench or other suitable holding device to prevent pump shaft rotation (Figure 25).
  • Page 15 MSS Series Pumps Pump Overhaul (cont.) 21. Remove shaft nut, lock washer and washer (Figure 26). Figure 26 Removing Shaft Nut and Washers 22. Remove bearing carrier and balance disc (Figure 27). Figure 27 Removing Bearing Carrier and Balance Disc 23.
  • Page 16 MSS Series Pumps Pump Overhaul (cont.) 24. Remove balance disc O-ring from shaft (Figure 29). Figure 29 Removing Balance Disc O-Ring 25. if equipped, remove end shell flange bolts and washers (Figure 30). NOTE: Once all flange bolts are removed, the internal stages will decompress causing a slight gap to appear between the shell flanges.
  • Page 17 MSS Series Pumps Pump Overhaul (cont.) 27. Remove discharge ring (Figure 32). Figure 32 Removing Discharge Ring 28. Remove end spacer (Figure 33). NOTE: The end spacer is specially dimensioned for each individual pump. Set this spacer aside for reassembly in its original position.
  • Page 18 MSS Series Pumps Pump Overhaul (cont.) 30. Remove diffuser housing (Figure 35). NOTE: Diffuser bushings are integral to the diffuser housings. Figure 35 Removing Diffuser Housing 31. Continue removing A) stage spacer, B) impeller, and C) diffuser housing until all end shell stages are disassembled (Figure 36).
  • Page 19 MSS Series Pumps Pump Overhaul (cont.) 33. If equipped, remove series shell flange bolts and washers (Figure 38). Figure 38 Removing Series Shell Flange Bolts and Washers 34. If equipped, remove series shell (Figure 39). Figure 39 Removing Series Shell...
  • Page 20 MSS Series Pumps Pump Overhaul (cont.) 35. If equipped, remove series spacer (Figure 40). Figure 40 Removing Series Spacer 36. Continue disassembling each series stage as in Step 31. A) stage spacer, B) impeller, and C) diffuser housing until the first diffuser housing is reached (Figure 41).
  • Page 21 MSS Series Pumps Pump Overhaul (cont.) 38. Remove first stage spacer (Figure 43). Figure 43 Removing First Stage Spacer 39. Remove pump shaft (Figure 44). Figure 44 Removing Pump Shaft 40. Remove series shell O-ring (Figure 45). Figure 45 Removing Series Shell O-Ring...
  • Page 22 MSS Series Pumps Pump Overhaul (cont.) 41. Remove inlet ring (Figure 46). Figure 46 Removing Inlet Ring 42. Remove stationary washer and retaining ring (Figure 47). Figure 47 Removing Stationary Washer and Retaining Ring 43. Remove stationary and mechanical seals with washer (Figure 48).

  • Page 23: Cleaning

    MSS Series Pumps Pump Overhaul (cont.) Cleaning Inspection Pump Shaft WARNING a) Place the shaft on a flat surface and roll to inspect for any distortion or run-out which may cause vibration. NEVER use petroleum or alcohol based solvents when b) Inspect threads - damaged threads can cause the cleaning pump components.

  • Page 24: Balance Disc Inspection

    MSS Series Pumps Pump Overhaul (cont.) Balance Disc Inspection 1. Inspect surfaces of balance disc for unusual wear. FRONT Surface may have some wear but should be smooth (Figure 49). REAR SIDE REAR FRONT Figure 49 Inspecting Balance Disc 2. Measure the balance disc outer hub thickness (Figure 50).

  • Page 25: Assembly

    MSS Series Pumps Pump Overhaul (cont.) Assembly 1. Install shaft retaining ring and stationary washer (Figure 52). Figure 52 Installing Stationary Washer and Retaining Ring 2. Install inlet ring (Figure 53). Figure 53 Installing Inlet Ring 3. Install series shell O-ring (Figure 54).
  • Page 26 MSS Series Pumps Pump Overhaul (cont.) 4. Install pump shaft and support it by hand until first stabilizing component can be installed (Figure 55). NOTE: Make sure pump shaft is resting on pre-set gauge block. This will ensure pump shaft is installed in the correct position.
  • Page 27 MSS Series Pumps Pump Overhaul (cont.) 7. If equipped, begin installing series stage components in order A) diffuser shell, B) impeller and C) stage spacer. Continue until all series shell stages are installed (Figure 58). Figure 58 Assembling Series Shell Stages 8.
  • Page 28 MSS Series Pumps Pump Overhaul (cont.) 9. If equipped, install series shell (Figure 60). Figure 60 Installing Series Shell 10. Install series shell flange bolts and washers (Figure 61). Tighten to 61 N-m (45 Lb-ft). Figure 61 Installing Series Shell Bolts and Washers...
  • Page 29 MSS Series Pumps Pump Overhaul (cont.) 11. Install end shell O-ring (Figure 62). Figure 62 Installing End Shell O-Ring 12. Continue installing end stage components in order A) diffuser shell, B) impeller, and C) stage spacer. Continue until all end shell stages are installed (Figure 63).
  • Page 30 MSS Series Pumps Pump Overhaul (cont.) 14. Install discharge ring (Figure 65). Figure 65 Installing Discharge Ring 15. If equipped, carefully lift and install end shell (Figure 66). Figure 66 Installing End Shell NOTE: A small gap between shell flanges should be noticeable at this time.
  • Page 31 MSS Series Pumps Pump Overhaul (cont.) 17. Lubricate and install balance disc O-ring (Figure 68). Figure 68 Installing Balance Disc O-Ring 18. Apply system compliant anti-seize compound on balance disc key and install balance disc key and washer (Figure 69).
  • Page 32 MSS Series Pumps Pump Overhaul (cont.) 20. Install balance disc (Figure 71). NOTE: Make sure balance disc is firmly seated in bearing carrier. Figure 71 Installing Balance Disc 21. Use a keyed shaft wrench or other suitable holding device to prevent pump shaft rotation during shaft nut installation (Figure 72).
  • Page 33 MSS Series Pumps Pump Overhaul (cont.) 23. Lubricate cavity cover O-ring and install cavity cover (Figure 74). NOTE: Make sure to align the throttle nipple opening to face downward. Figure 74 Installing Cavity Cover 24. Locate the discharge housing alignment pin in the bearing carrier and note the discharge housing alignment cavity (Figure 75).
  • Page 34 MSS Series Pumps Pump Overhaul (cont.) 26. Temporarily install throttle nipple to ensure cavity cover and discharge housing are properly aligned (Figure 77). 27. Remove throttle nipple. Figure 77 Test Fitting Throttle Nipple 28. Install the discharge housing retaining ring (Figure 78).
  • Page 35 MSS Series Pumps Pump Overhaul (cont.) 30. Install new throttle nipple O-ring into the discharge housing (Figure 80). Figure 80 Installing Throttle Nipple O-Ring 31. Apply thread sealing tape to throttle nipple threads and lubricate non-threaded portion of throttle nipple (Figure 81).
  • Page 36 MSS Series Pumps Pump Overhaul (cont.) 33. Apply thread sealing tape to drain line elbow and reconnect bearing drain line to the throttle nipple (Figure 83). Figure 83 Connecting Drain Line 34. Install stationary and mechanical seals onto pump shaft (Figure 84). Refer to the service manual for seal installation procedures.

  • Page 37: Specifications

    MSS Series Pumps Specifications (cont.) Components Exploded Views External Components Figure 85 Pump Assembly External Components Item Description Item Description Throttle nipple O-ring Shaft bushing Throttle nipple Support bracket Drain line Precision leveling foot Inlet ring End shell Inlet housing...
  • Page 38 MSS Series Pumps Specifications (cont.) Components Exploded Views Internal Components Figure 86 Pump Assembly Internal Components Item Description Item Description Cap screws (3 Req'd) Stage spacer Retaining clips (3 Req'd) Diffuser housing Discharge housing retaining ring Balance disc O-ring Discharge housing...

  • Page 39: Recommended Spare Parts List

    MSS Series Pumps Specifications (cont.) Recommended Spare Parts List 1-3 years of service A maintenance kit (P/N 8-M0015-MTK) and a retaining ring kit (P/N 8-M0015-RTK) should be kept on hand. The maintenance kit consists of a balance disk, mechanical seal and O-rings. The retaining ring kit consists of all retaining rings in the assembly.

  • Page 40: Fastener Specifications

    MSS Series Pumps Specifications (cont.) Fastener Torque Specifications Item Metric Standard Precision leveling foot top cradle nuts 149 N-m 110 Lb-ft Motor adapter bolts - 3/8" 28 N-m 21 Lb-ft Motor adapter bolts - 1/2" 61 N-m 45 Lb-ft Support bracket adjustment bolts...

  • Page 41: Maintenance

    1. Recheck pump alignment (refer to Final Pump Alignment). 2. Visually inspect coupling and tighten the coupling bolts to the specified torque as necessary. 3. Fill out and submit all warranty documentation to FEDCO. Six (6) months after commissioning 1. Inspect pump alignment (refer to Final Pump Alignment).

  • Page 42: Service Policy

    Please contact a FEDCO before returning any equipment. You must have a Return Authoriza- tion Number (RAN) issued by FEDCO before we can accept any parts. All returned parts must be shipped prepaid to FEDCO with the RAN clearly marked on the package. We need this number to ensure proper handling of the returned parts and supply of new parts, if needed.

  • Page 43: Warranty

    If the MSS pump is altered or repaired without prior approval of FEDCO, all warranties are void. All equipment provided by FEDCO, including pump motors, must be installed on a rigid, steel support structure and base capable of handling full loads during operation.

  • Page 44: Warranty Registration Form

    MSS Series Pumps Service Policy (cont.) Warranty Registration Form THIS FORM MUST BE COMPLETED AND RETURNED TO FEDCO TO ACTIVATE YOUR WARRANTY COVERAGE. FEDCO will send confirmation of start of warranty coverage Please FAX this page to FEDCO to register your warranty.

  • Page 45: Overhaul Record

    MSS Series Pumps Service Policy (cont.) Overhaul Record Overhaul Date: _____________________________ Operating Hours: ___________________________ Reason for Overhaul: ______________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ Operating Data Prior to Overhaul: Feed Flow: _____________________________ Suction Pressure to Pump: ___________________ Discharge Pressure: _____________________ Operating Data After Overhaul:...

  • Page 46: Start Up Record

    MSS Series Pumps Service Policy (cont.) Start Up Record Start Up Check List Flexible coupling set screws tightened. Motor adapter guards installed. All anchor bolts tightened to specifications. All pipe couplings tightened to specifications. Motor rotational direction correct. Motor lubricated to manufacturers specifications.

This manual is also suitable for:

Mss-15Mss-20Mss-30

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