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Desmi NSA Series Operation And Maintenance Instructions

Self-priming centrifugal pump
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OPERATION AND MAINTENANCE INSTRUCTIONS
DESMI self-priming centrifugal pump
Tagholm 1 – DK-9400 Nørresundby – Denmark
Special pump No. ................................................
TYPE NSA
DESMI Pumping Technology A/S
Tel.: +45 96 32 81 11
Fax: +45 98 17 54 99
E-mail:
desmi@desmi.com
Internet:
www.desmi.com
Manual:
Language:
T1493
English
Revision:
E (11/19)

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Summary of Contents for Desmi NSA Series

  • Page 1 OPERATION AND MAINTENANCE INSTRUCTIONS DESMI self-priming centrifugal pump TYPE NSA 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 Manual: Language: Revision:...

  • Page 2: Table Of Contents

    Table of contents: 1. PRODUCT DESCRIPTION ........................3 1.1 DELIVERY ..............................3 2. TECHNICAL DATA ........................... 3 2.1 EXPLANATION OF THE TYPE NUMBER .................... 3 2.2 TECHNICAL DESCRIPTION ........................4 3 . INSTALLATION ............................5 3.1 MOUNTING/FASTENING ........................5 3.2 WIRING ..............................5 4.

  • Page 3: Product Description

    These operation and maintenance instructions apply to the DESMI NSA-pump series. The pumps are available in the sizes DN50 and DN80 discharge. DESMI NSA is a single-stage self-priming centrifugal pump with stainless steel shaft, and mechanical shaft seal. The NSA-pump is further equipped with a semi-open impeller, which does not choke as easily as a closed impeller.

  • Page 4: Technical Description

    Mt (Nm) Pump Fv (N) Fh (N) NSA-50-200 1250 1550 NSA-80-250 1450 1050 1800 DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 5: Installation

    OF June 14, 1989, on the safety of machines. 3.2 WIRING Wiring to be carried out by authorised skilled workmen according to the rules and regulations in force. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11...

  • Page 6: Transport/ Storage

    Before shipment the pump is to be fastened securely on a pallet or the like. The pump is to be stored in a dry area. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11...

  • Page 7: Inspecting The Pump

    5.4 ALIGNING COUPLING In order to avoid break-downs of a pump coupled to a motor on the same base plate through a flexible coupling, the following should be observed: DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11...

  • Page 8: Frost Protection

    If the pump has been pumping hot liquids, take great care that it is drained before it is removed from the piping system. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11...

  • Page 9: Start-Up

    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 majority of faults stem from the piping system. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf.
  • Page 10 5. Suction lift too high Check data sheet Q/H curve 6. Pump and piping and NPSH or contact DESMI system wrongly As 5 dimensioned 7. RPM too low Electric motor running on two...

  • Page 11: Inspection And Maintenance

    - Inspect the shaft seal for leaks at regular intervals. - Activate the relief valve at regular intervals in order to check the function. If the valve is choked, replace or clean it, if possible. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf.

  • Page 12: Draining The Pump

    NSA50-200 3000 RPM NSA80-250 3000 RPM The capacities of the pumps appear from the nameplates. DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail:...

  • Page 13: Eu Declaration Of Conformity

    13. EU DECLARATION OF CONFORMITY DESMI PUMPING TECHNOLOGY A/S, hereby declare that our pumps of the type manufactured in conformity with the following essential safety and health requirements in the COUNCIL DIRECTIVE 2006/42/EC on machines, Annex 1. The following harmonized standards have been used: EN/ISO 13857:2008 Safety of machinery.

  • Page 14: 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 15: Assembly Drawings And Spare Parts Lists

    29 Key 30 Stud 31 Screw/washer 33 Plug/sealing washer 37 Shaft seal 38 Check valve DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

  • Page 16: Assembly Drawing Nsa80-250/Zz-M12

    75 Pipe plug 76 Relief valve *) Only for size 132 motor **) If B5 motor DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail:...

  • Page 17: Assembly Drawing Nsa80-250/Zz-M09

    Sealing washer Set screw Sealing washer Shaft Washer Pipe plug Pipe plug Relief valve DESMI Pumping Technology A/S Tagholm 1 9400 Nørresundby – Dänemark Tlf. nr.: +45 96 32 81 11 Fax +45 98 17 54 99 E-mail: desmi@desmi.com www.desmi.com...

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