Desmi NSLV Operation & Maintenance Instructions Manual
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Desmi NSLV Operation & Maintenance Instructions Manual

End suction centrifugal pump monobloc
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OPERATION AND MAINTENANCE INSTRUCTIONS
DESMI end suction centrifugal pump
DESMI Pumping Technology A/S
Tagholm 1 – DK-9400 Nørresundby – Denmark
Manual:
T1524
Special pump No. ...............................................
NSLV and NSLH Monobloc
Tel.: +45 96 32 81 11
Fax: +45 98 17 54 99
E-mail:
desmi@desmi.com
Internet:
www.desmi.com
Language:
English
Revision:
L(12/22)

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  • Page 1 OPERATION AND MAINTENANCE INSTRUCTIONS DESMI end suction centrifugal pump NSLV and NSLH Monobloc DESMI Pumping Technology A/S Tagholm 1 – DK-9400 Nørresundby – Denmark Tel.: +45 96 32 81 11 Fax: +45 98 17 54 99 E-mail: desmi@desmi.com Internet: www.desmi.com...

  • Page 2: Table Of Contents

    15. ATEX DECLARATION OF CONFORMITY....................28 15.1 PRODUCT DESCRIPTION......................... 28 15.2 PRECAUTIONS ..........................28 16. INFORMATION RELEVANT FOR DISASSEMBLY OR DISPOSAL AT END-OF-LIFE ......29 DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...
  • Page 3 42. SPARE PARTS LIST 300-415/-02 WITH INDUCER ................42 43. ASSEMBLY DRAWING NSLH 250-210/300-250/350-310/400-390/500-500/600-630......43 44. SPARE PARTS LIST NSLH 250-210/300-250/350-310/400-390/500-500/600-630 ........ 43 45. ASSEMBLY DRAWING NSLV 250-210/300-250/350-310/400-390/500-500/600-630......44 46. NSLV 250-210/300-250/350-310/400-390/500-500/600-630 ..............44 47. DIMENSIONAL SKETCH .......................... 45 48.

  • Page 4: Product Description

    See below. 2.1 EXPLANATION OF THE TYPE NUMBER All the NSLV and NSLH pumps are provided with a name plate. The type number indicated on the name plate is built up as follows: NSLVXXX-YYY/MR-Z or NSLHXXX-YYY/MR-Z XXX: Pressure branch diameter, YYY: Nominal impeller diameter M: The material combination of the pump.
  • Page 5 If the pumps are designed for special purposes the following is to be indicated: Pump No. Pump type : Application : Comment DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 6: Technical Description

    1330 1060 1860 200-415 200-525 250-210 2500 3150 2820 4900 1770 1140 1400 2470 250-330 DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 7: Installation

    "calc" is the values calculated by the user. At the same time none of the forces or moments may exceed the indicated figure multiplied by 1.4. 3. INSTALLATION See also: DESMI Guidelines for pump installations at: www.desmi.com/media/sd5ltlox/guidelines_uk.pdf 3.1 MOUNTING/FASTENING The pump should be mounted and fastened on a solid base plate or wall mounted frame so distortion is avoided.

  • Page 8: Transport/Storage

    4. TRANSPORT/STORAGE See also: DESMI Pump Storage and Preservation at: www.desmi.com/media/vqkjqh54/t1534uk.pdf The weights of the pumps in A(GG20&GGG40), D(RG5) and S(1.4436&1.4410) combination (without motor or common baseplate) are stated in the following table, and the pumps are to be lifted as shown below.

  • Page 9: Dismantling

    Remove guards (28). Remove set screws (64) which hold the motor bracket (20) to the pump casing (1). Dismantle copper pipe (58) (for NSLV). Remove motor bracket and motor. Remove set screws (22) with washers (23), which hold the shaft seal cover (18) to the pump casing. Loosen the shaft seal cover from the pump casing by means of the pointed screws (86).

  • Page 10: Dismantling Shaft Seal

    Remove guards (28). Remove set screws (64) which hold the motor bracket (20) to the pump casing (1). Dismantle copper pipe (58) (for NSLV). Remove set screws (22) with washers (23), which hold the shaft seal cover (18) to the pump casing. Loosen the shaft seal cover from the pump casing by means of the pointed screws (86).

  • Page 11: Inspection

    Check the rubber parts for elasticity. - Bearings: Replace in case of wear and noise. - Sliding bearing/shaft: Wear=max. 0.7 mm diameter difference (only for NSLV mixed flow) DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 12: Dismantling Coupling (02-Combination) / Shaft (12-Combination)

    Part. No. Pump Casing/Rear Pump Casing/Rear Cover Size (mm) Cover in GG20/Rg5 in GGG40/NiAlBz/SS material material DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 13: Fitting Sealing Rings

    If shim(s) are mounted between cover under bearing (26) and bearing then also mount shim(s) when bearings are replaced. DESMI spare part numbers for 0.1 mm thick shims: 705057 (SHIM Ø110/140), 707214 (SHIM Ø130/160), 722876 (SHIM Ø160/190) 6.4 FITTING WATER DEFLECTOR (ONLY 02-COMBINATION) ø215/265...

  • Page 14: Fitting Impeller

    70 μm 40 Nm 70 μm 55 Nm 70 μm 75 Nm 70 μm 160 Nm DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 15: Fitting Coupling (Only 02-Combination)

    Pumps which are not in operation during frost periods are to be drained to avoid frost damage. Remove the plug (3) at the bottom to empty the pump. Alternatively, it is possible to use anti-freeze liquids in normal constructions. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 16: Dismantling

    Should the pump not function as intended, please proceed according to the fault-finding list. Bear in mind, though, that the pump was carefully checked and tested at the factory and that the DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 17: Mechnical Seal Failure Analysis

    Find the leakage, repair the fault, non-return valve not submerged 5. Pump takes air Check data sheet Q/H curve and 6. Suction lift is too high NPSH or contact DESMI 7. Pump and piping system As 5 wrongly dimensioned Insert orifice plate or check valve 1.
  • Page 18 3. Possible leaking cause problems mechanical seal DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...
  • Page 19 2. Can operate for a short time towards shut discharge valve, refer to the chapter 9 DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...
  • Page 20 (e.g. chamber piping) they must be disassembled and cleaned inside regularly DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...
  • Page 21 Check regularly that the shaft seal leak drain hole in the rear cover (or in bearing cover/bracket on some pump designs) is not clogged up. A clogged shaft seal leak hole can lead to DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark...

  • Page 22: Inspection And Maintenance

    DRAIN HOLE FOR SHAFT SEAL DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 23: Draining The Pump

    The bearing is dimensioned for a nominal (i.e. only obtainable for ideal greasing and operating conditions) life of 100,000 working hours and is to be relubricated according to the below table. The bearing is to be replaced in case of noise or bearing wear. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...
  • Page 24 300-418 500-500 200-525 250-525 Heavy bearing 300-525 4500 hours 80 g housing 350-525 600-630 DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 25: Repairs

    When ordering spare parts please always state pump type, serial No. (appears on the name plate of the pump), position No. on the assembly drawing and designation on the spare parts list. Spare parts or Spare Parts Kit (SPK) can be ordered via spareparts@desmi.com Recommended spare parts stock for 2 years' operation to DIN 24296.

  • Page 26: Maximum Working Pressure

    1.5 x the permissible working pressure. The test pressure is stated in the test certificate and stamped into the discharge flange of the pump. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 27: Eu & Uk Declaration Of Conformity

    14. EU & UK DECLARATION OF CONFORMITY DESMI PUMPING TECHNOLOGY A/S, hereby declare that our pumps of the NSLV and NSLH Monobloc type are manufactured in conformity with the following essential safety and health requirements in the COUNCIL DIRECTIVE 2006/42/EC on machines, Annex 1.

  • Page 28: Atex Declaration Of Conformity

    The precautions to be taken using the pumps in areas where the ATEX rules for “Ex II 2G Ex h IIb T4 Gb X” marked equipment apply. Only pumps mounted with EX-marked nameplate from DESMI are approved for / allowed to be used in EX areas.

  • Page 29: Information Relevant For Disassembly Or Disposal At End-Of-Life

    16. INFORMATION RELEVANT FOR DISASSEMBLY OR DISPOSAL AT END-OF-LIFE No damage materials are used in DESMI pumps – please refer to DESMI Green Passport (can be sent on request – contact a DESMI sales office) – i.e. common recycling companies can handle the disposal at end-of-life. Alternatively the pump and motor can be returned to DESMI at end-of-life for safe recycling.

  • Page 30: Assembly Drawing Ø215/265/ 02-Comb

    Ball bearing Support disc Bearing cover Allen screw Shaft Shaft seal cover Coupling Motor bracket O-ring Allen screw Guard Pipe (For NSLV) Hexagon nipple Hole For NSLH Allen screw Set screw Intermediate flange Point screw INSEX-screw Sunk key Sealing washer Manometer...

  • Page 31: Assembly Drawing Ø330/415/465/525 02-Comb

    Shaft Shaft seal cover Coupling Motor bracket O-ring Set screw Lock washer Cover under bearing* Sealing ring 2 Guard Pipe (For NSLV) Hexagon nipple Hexagon nipple Set screw Allen screw Set screw Intermediate flange Point screw INSEX-screw Sunk key Sealing washer...

  • Page 32: Assembly Drawing 300-418 02-Comb

    21 O-ring 22 Set screw 23 Lock washer 26 Cover under bearing* 27 Sealing ring 2 28 Guard 58 Pipe (For NSLV) 59 Hexagon nipple 61 Hexagon nipple 64 Set screw 70 Allen screw 71 Set screw 72 Intermediate flange...

  • Page 33: Assembly Drawing Ø215/265 12-Comb

    Spring washer Washer Sunk key Mech. shaft seal Shaft Motor bracket O-ring Allen screw Guard Pipe (for NSLV) Hexagon nipple Set screw Point screw INSEX-screw Sealing washer DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 34: Assembly Drawing Stainless Steel Pump Ø215/265 12-Comb

    Sunk key Mech. shaft seal Shaft Rear cover Motor bracket O-ring Allen screw Guard Allen screw Pipe (for NSLV) Hexagon nipple Set screw Point screw INSEX-screw Sealing washer Point screw DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11...

  • Page 35: Assembly Drawing Ø330/415/525 12-Comb

    O-ring Allen screw Guard Set screw Set screw Point screw INSEX-screw Sealing washer Point screw DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 36: Assembly Drawing 300-418 And 350-525 12-Comb

    Seal ring 2 Guard Plug Set screw Set screw Point screw INSEX-screw Sealing washer Point screw DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 37: Assembly Drawing 65-265/-02 With Inducer

    Pointed screw INSEX-screw Sunk key Sealing washer Inducer pipe O-ring Set screw Base frame Alan screw DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 38: Assembly Drawing 100-265/-02 With Inducer

    Coupling Motor bracket O-ring Hole For NSLH Set screw Cap nut Spring washer Stud Guard Pipe (For NSLV) Hexagon nipple 70 Allen screw 71 Set screw 72 Intermediate flange 73 Point screw 75 INSEX-screw 76 Sunk key Sealing washer DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark...

  • Page 39: Assembly Drawing 100-330/-02 And 100-465/-02 With Inducer

    Sunk key Sealing washer Lubricator nipple Point screw Inducer pipe O-ring Set screw Base frame DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 40: Assembly Drawing 125-330/-02 With Inducer

    Pointed screw INSEX-screw Sunk key Sealing washer Lubricator nipple Point screw Inducer pipe O-ring Set screw DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 41: Assembly Drawing 150-465/-02 With Inducer

    Sunk key Sealing washer Lubricator nipple Point screw Base frame *) Option -See Appendix B DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 42: Assembly Drawing 300-415/-02 With Inducer

    Point screw Base frame L support Set screw Set screw *) Option -See Appendix B DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 43: Assembly Drawing Nslh 250-210/300-250/350-310/400-390/500-500/600-630

    210 Lip seal 14 Support disc 64 Set screw 211 O-ring 15 Bearing cover 71 Set screw DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail:...

  • Page 44: Assembly Drawing Nslv 250-210/300-250/350-310/400-390/500-500/600-630

    45. ASSEMBLY DRAWING NSLV 250-210/300-250/350-310/400-390/500-500/600-630. 46. NSLV 250-210/300-250/350-310/400-390/500-500/600-630 1 Pump casing 17 Shaft 55 Tube seamless 2 Pipe plug 18 Rear cover 56 Red.bush 3 Pipe plug 19 Coupling 57 Elbow 4 Sealing ring 20 Motor bracket 58 Nipple 5 Impeller...

  • Page 45: Dimensional Sketch

    47. DIMENSIONAL SKETCH Please require a dimensional sketch of the actual pump from DESMI. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 46: Desmi Subsidiary

    48. DESMI S UBSIDIARY Subsidiary companies – DESMI Pumping Technology A/S Company Name Address Country Telephone DESMI Pumping No. 740 Fengting Avenue China +86 512 6274 0400 +86 512 6274 Technology (Suzhou) Weiting Sub District 0418 Co.,Ltd. 215122 SIP Suzhou, P. R. China...

  • Page 47: Service Center-Denmark

    +45 3677 3399 DK-2650 Hvidovre Odense Hestehaven 61 +45 70236363 +45 6595 7565 DK-5260 Odense S DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...
  • Page 48 I.e. there shall always be 44.5 +/- 0.5mm from sliding surface on the seat to the end of the rotating part, on the sizes of ELK sealing used by DESMI. Please observe that the rotating part protrudes 2 mm beyond the shoulder on the pump shaft as shown below.
  • Page 49 The lip seal kit is optional. ◼ SPARE PARTS LIST Cover under bearing 210 Lip Seal 211 O-ring DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby - Denmark Tel.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail:...

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