Grundfos NBS Service Instructions Manual
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Grundfos NBS Service Instructions Manual

Grundfos NBS Service Instructions Manual

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GRUNDFOS INSTRUCTIONS
NBS, NBSE
Service instructions

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Summary of Contents for Grundfos NBS

  • Page 1 GRUNDFOS INSTRUCTIONS NBS, NBSE Service instructions...
  • Page 3 NBS, NBSE English (GB) Service instructions ............... . 4...

  • Page 4: Table Of Contents

    Nameplate ....... 5 The symbols and hazard statements below may appear in Grundfos Type key .

  • Page 5: Identification

    2. Identification 2.1.1 Looking up service parts in Grundfos Product Center • Always check the production code (PC code) on the nameplate 2.1 Nameplate before looking up service parts in Grundfos Product Center. • Different codes are created if the modified service parts are not backwards interchangeable.

  • Page 6: Type Key

    2.2 Type key Example 1: NBS 025-095/08.43AAEG6S3ESBQQETX2 Example 2: NBS 040-150/16.77AFEG7TBESDQQE1X4 Example 3: NBS 060-135/1291-1276AAEG7TBESDQQEWX4 Example 4: NBSE 025-110/11.02ASFEG6S2ESBQQENDA Example 5: NBSE 030-110/1094-1063ACAEG7S7FSDAQFODA Pos. Example 1 -095 /8.43 BQQE Example 2 -150 /16.77 DQQE Example 3 -135 /1291-1276 DQQE Example 4...
  • Page 7 Pos. Explanation Code for materials Code Pump housing Impeller Wear ring Shaft A48 Class 35 No wear ring A48 Class 35 No wear ring A48 Class 35 No wear ring A48 Class 35 No wear ring SAF 2205 A48 Class 35 No wear ring A48 Class 35 No wear ring...
  • Page 8 2.2.1 Letter codes for shaft seals Pos. 14 in NBS type key example. Code Description Code explanation example A: O-ring seal with fixed driver Shaft seal type B: Rubber bellows seal D: O-ring seal, balanced H: Cartridge seal, balanced A: Carbon, metal-impregnated with antimony which is not approved for potable water...
  • Page 9 2.2.2 Codes for rated motor power 2.2.3 Codes for phase and voltage or other information Pos. 15 in NBSE, NBS type key example. Pos. 16 in NBSE, NBS type key example. Description Code Description Code [hp] [kW] E-motor (ECM ), 1 x 200-240 V 0.16...

  • Page 10: Service Tools

    3. Service tools Ring/open-end spanner Hexagon T-key Cross-recess screwdriver Reversible-bit screwdriver Bits kit Hexagon key Plastic hammer Pry bar Gauge for inner diameter meas- Torque wrench Punch for shaft seal Soft jaws urement of wear ring Pinch bar Sliding gauge Ratchet spanner with socket Hexagon key set Steel brush...

  • Page 11: Disassembly And Assembly

    Do not drop pump components when servicing the product. Check also the following service videos in association with this task: How to dismantle and assemble Grundfos NBS single-stage pump 4. Remove split coupling pieces. How to replace low pressure shaft seal on Grund- fos NBS single-stage pump 4.1 Disassembling the pump...
  • Page 12 6. Remove pump and motor keys. 10. Remove stationary part of the shaft seal from seal cover. 7. Loosen seal cover screws. 11. Note O-ring condition on shaft seal and on seal cover (surface cracks, stiffness, swelling). 8. Remove seal cover. 12.
  • Page 13 13. Check condition of spring and seal face. 17. Loosen and remove motor stool from pump housing. 18. Loosen pump cover from pump housing. 14. Loosen motor from support rails. 19. Note 12 o’clock position of pump cover correlating with the 15.

  • Page 14: Checking Gap Between Impeller And Pump Housing/ Cover (Wear Rings)

    21. Note condition of cover O-ring (surface cracks, stiffness and 2. Measure and note the bore in cover (wear ring, if fitted). swelling). 4.2 Checking gap between impeller and pump housing/ 3. Measure and note impeller interface to pump housing. cover (wear rings) •...

  • Page 15: Assembling The Pump

    4.4 Assembling the pump 1. Assemble impeller to the shaft. • Fit impeller key. • Impeller eye at the same side as where the impeller is tightened. 4. Check condition and cleanliness for pump cover and O-ring. Use locally approved lubricants, for example, Rocol Sapphire Aqua SIL.
  • Page 16 6. Tighten pump cover nuts. 8. Assemble motor stool and motor, and tighten nuts. For the required torque, see Torques table. For the required torque, see Torques table. 9. Fit motor to support rails. 7. Assemble motor stool and pump housing, and tighten nuts. For the required torque, see Torques table.
  • Page 17 11. Lubricate new shaft seal inside the bellow. 13. Check condition and cleanliness of seal cover. Use locally approved lubricants, for example, Rocol Sapphire Aqua SIL. 14. Lubricate O-rings. Use locally approved lubricants, for example, Rocol Sapphire Aqua SIL. Make sure NOT to touch the seal face. 12.
  • Page 18 15. Spray soapy water on seal face of stationary shaft seal part. 17. Apply thread lubricant where torque tightening is required. Lubricate seal faces with soapy water, shaft seal with Use locally approved thread lubricants, for example, seal face combination xQQx (silicon carbide-silicon NEVER-SEEZ.
  • Page 19 20. Align shaft key slots to the position of 10 o’clock. 22. Use the fork tool to compress the shaft seal spring before assembling the split coupling. 21. Assemble keys to motor and pump shaft. Use locally approved thread lubricants, for example, NEVER-SEEZ.
  • Page 20 23. Check condition and cleanliness of the split coupling pieces. 26. Tighten by hand, and check the coupling gap. 24. Make sure that: 27. Remove the fork tool. • The split coupling pieces engage with shaft keys. • The coupling rests against the fork tool flap. 28.
  • Page 21 29. Make sure that the shaft runs freely. 31. Re-install fork tool in motor stool holder. 32. Tighten coupling guard screws. • Tighten with 5 Nm or hand-tighten. 30. Tighten the split coupling key set screws. For the required torque, see Torques table. Otherwise, hand-tighten the screws plus 15-20 de- Related information gress.

  • Page 22: High Pressure Seal Replacement

    Check also the following service videos in association with this task: How to replace high pressure shaft seal on Grundfos NBS single-stage pump 5.1 Dismantling old seal 1. Remove seal cover. 5. Remove rotating part of the shaft seal (seal face part).

  • Page 23: Assembling New Seal

    7. Loosen set screws of rotating seal drive part. 5.2 Assembling new seal 1. Clean pump shaft, remove rust and debris. Use steel brush or emery grinding paper. One set screw must be 1 mm above surface of driver part. This set screw can be used to pull out the rotating seal drive part.
  • Page 24 4. Note that two set screws are mounted in the driver part. 6. Check condition and cleanliness of new shaft seal spring and seal face. Drive part must rest against the impeller. Lubricate seal face with soapy water. 5. Tighten set screws. Hand tighten plus 15-20 degrees.
  • Page 25 7. Make sure that driver parts are engaged. 10. Spray soapy water on seal face of stationary shaft seal part . 8. Check condition and cleanliness of seal cover. Lubricate seal faces with soapy water, shaft seal with seal face combination xQQx (silicon carbide-silicon carbide) must NEVER run dry.

  • Page 26: Reference Information

    11. Use a soft tool to position stationary seal part in seal cover. 6. Reference information 6.1 Torque table Impeller nuts Torque [Nm] 41 +/- 4 65 +/- 7 120 +/- 10 300 +/- 35 300 +/- 35 Pump cover nuts Torque [Nm] 45 +/- 9 12.

  • Page 27: Gap Between Impeller And Pump Housing/Cover (Wear Rings)

    6.3 Gap between impeller and pump housing/cover Tolerance table (wear rings) If the difference exceeds the maximum seal gab according to the above limit curve, the below table informs whether the wear ring or A leak flow (1) will occur in gap (2) between the rotating impeller the impeller is worn out.

  • Page 28: Related Documents

    -0.22 -0.307 90.55 0.087 -0.22 -0.307 6.5 Service videos 100.55 0.087 -0.22 -0.307 You can find video instructions for the service of NBS/NBSE pumps 100.55 0.087 -0.22 -0.307 by exploring the following QR codes/links: 100.55 0.087 -0.22 -0.307 Video QR code 112.55...

  • Page 29: Fault Finding

    7. Fault finding CAUTION Cold surfaceor Hot surface DANGER Minor or moderate personal injury Electric shock ‐ When pumping hot or cold liquids, make sure that no Death or serious personal injury one can accidentally come into contact with hot or cold ‐...
  • Page 30 Fault Cause Remedy • Increase the liquid level on the inlet side. a) The inlet pressure is too low,resulting in • Open the isolating valve in the inlet pipe. cavitation in the pump. • Make sure that all the conditions in section Pipes are com- plied with.

  • Page 31: Exploded Drawings

    8. Exploded drawings Center-line outlet 203b 201b 105c 651a...
  • Page 32 Tangential outlet 203b 201b 105c 651a...
  • Page 33 NBSE 203b 201b 105c 651a...
  • Page 34 Tel.: +387 33 592 480 Centre Turkey Fax: +387 33 590 465 29-33 Wing Hong Street & 68 King Lam GRUNDFOS Pumper A/S GRUNDFOS POMPA San. ve Tic. Ltd. Sti. www.ba.grundfos.com Street, Cheung Sha Wan Strømsveien 344 Gebze Organize Sanayi Bölgesi E-mail: grundfos@bih.net.ba...
  • Page 35 92622616 09.2021 ECM: 1320672...

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Nbse

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