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KNF N920 AP.18 Operating Instructions Manual

Diaphragm vacuum pump
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KNF Neuberger GmbH
Alter Weg 3
D-79112 Freiburg
Germany
Phone +49-(0)7664 / 5909-0
Fax +49-(0)7664 / 5909-99
E-Mail:
info@knf.de
www.knf.de
KNF 121416-121419 07/18
Translation of original Operating Instructions, english
Operating Instructions
Read and observe these Operating Instructions!
Diaphragm Vacuum Pump
N920 AP.18
N920 AP.29.18
Contents
1. About this document.................................................................. 3
2. Use ............................................................................................ 4
3. Safety ........................................................................................ 5
4. Technical Data .......................................................................... 7
5. Design and Function ............................................................... 10
6. Installation and connection ...................................................... 12
7. Operation ................................................................................. 13
8. Servicing .................................................................................. 16
9. Troubleshooting ....................................................................... 25
10. Spare parts and accessories ................................................... 27
11. Returns .................................................................................... 28
N920 KT.29.18G
Keep for future use!
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Summary of Contents for KNF N920 AP.18

  • Page 1: Table Of Contents

    Operating Instructions Read and observe these Operating Instructions! Diaphragm Vacuum Pump N920 AP.18 N920 KT.29.18G N920 AP.29.18 Contents Page 1. About this document..............3 2. Use .................... 4 3. Safety ..................5 4. Technical Data ................7 KNF Neuberger GmbH 5.

  • Page 3: About This Document

     An activity to be carried out (a step) is specified here. 1. The first step of an activity to be carried out is specified here. Additional, consecutively numbered steps follow. This symbol refers to important information. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 4: Use

    The pumps are not suitable for transferring liquids. The pumps must not be used to create vacuum and overpressure simultaneously. An overpressure must not be applied to the suction side of the pump. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 5: Safety

    If necessary, consider any external sources of energy, such as radiation, that may add heat to the medium. In case of doubt, consult the KNF customer service. Environmental protection Store all replacement parts in a protected manner and dispose of them properly in accordance with the applicable environmental protection regulations.
  • Page 6 II  the pollution degree 2. Customer service and Only have repairs to the pump carried out by the KNF Customer repairs Service responsible. Only authorized personnel should open those parts of the housing that contain live electrical parts.

  • Page 7: Technical Data

    EPDM Tab. 2 N 920 KT.29.18G Component Pump material Pump head Diaphragm PTFE-coated Valve EPDM Gas ballast valve PVDF Tab. 3 Refer to the type plate for the pump’s electrical configuration. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 8 50/60 Hz Max. operating current [A] Power consumption pump [W] Maximum permitted mains +/- 10 % voltage fluctuations Protection class motor IP20 Tab. 4 * Liters in standard state (1,013 mbar) Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 9 50/60 Hz Max. operating current [A] Power consumption pump [W] Maximum permitted mains +/- 10 % voltage fluctuations Protection class motor IP20 Tab. 5 * Liters in standard state (1,013 mbar) Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 10: Design And Function

    (1). The transfer chamber (3) is hermetically separated from the pump drive (7) by the diaphragm. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 11 The working diaphragm remains stable, independent of the inlet pressure of the pump. This improves the suction speed of the pump significantly, over its entire working range. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 12: Installation And Connection

    VC 900 (Fig. 2/6, see Chapter 10.2 Accessories for interface cable). Further information on con- necting see operating instructions VC 900. 5. Insert the power cable’s plug into a properly installed shockproof socket. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 13: Operation

    For further information, contact your KNF technical adviser.  With the pump at a standstill, open pressure and suction lines Pump standstill to normal atmospheric pressure. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 14 The flow rate cannot be varied. N 920 AP.29.18 und N 920 KT.29.18G The pump's speed can be varied via the potentiometer (fig. 2/3). The flow rate can be adjusted this way. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 15 The gas ballast valve is opened and closed via the gas ballast switch (see Fig. 5). Please contact KNF Service if you require an inert connection for the gas ballast. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 16: Servicing

    8.2.2. Cleaning Pump  Only use solvents for cleaning if the head materials cannot be attacked (check the resistance of the material!).  If compressed air is available, blow out the components. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 17 Depending on the substance transferred, caustic burns or poisoning are possible. WARNING  Wear protective clothing if necessary, e.g. protective gloves.  Flush pump before replacing the diaphragm and valve plates (see chapter 8.2.1). Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 18 13 Connecting rod, head 3 14 Adapt er 15 Pump housing 16 Fan 17 Stabilization diaphragm 18 O-ring (ø 5.5 x 2) 19 Screw Fig. 6: Exploded drawing N 920 AP.18 / N 920 AP.29.18 Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 19 8. Screw in the new stabilization diaphragm (17) and tighten it hand-tight with the assembly key. 9. Put spacer(s) onto the thread of the new stabilization dia- phragm (17) (same number). Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 20 1. Reconnect suction and pressure line to the pump. 2. Reconnect the pump to the electricity supply. If you have any questions about servicing, call your KNF technical adviser (see last page for contact telephone number). Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 21 Depending on the substance transferred, caustic burns or poisoning are possible. WARNING  Wear protective clothing if necessary, e.g. protective gloves.  Flush pump before replacing the diaphragm and valve plates (see chapter 8.2.1). Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 22 3. Undo two screws (6) each, and remove both covers (5) at head cover (4). 4. Lift the head cover (4) off the pump housing (18). 5. Lift off head plate (10) with intermediate plates (11), (14) and (15). Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 23 Upper and lower sides of the valve plates are identical. For correct position see fig. 9. 7. Dispose of the old diaphragms, valve plates and O-rings Fig. 9: Position of valve plates properly. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 24 1. Reconnect suction and pressure line to the pump. 2. Reconnect the pump to the electricity supply. If you have any questions about servicing, call your KNF technical adviser (see last page for contact telephone number). Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 25: Troubleshooting

     Remove the clogging parts and particles.  Clean head components. Head parts are soiled.  Replace diaphragm and valve plates (see chapter 8.3). Diaphragm or valve plates are worn. Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 26 Fault cannot be rectified If you are unable to determine any of the specified causes, send the pump to KNF Customer Service (see last page for the ad- dress). 1. Flush the pump to free the pump head of dangerous or ag- gressive gases (see chapter 8.2.1).

  • Page 27: Spare Parts And Accessories

    Assembly key for stabilization diaphragm 116885 (only for N 920 AP.18 and N 920 AP.29.18) Interface cable Vacuum controller – KNF pump (2m) 307757 Interface cable Vacuum controller – KNF pump (5m) 307758 Tab. 15 Translation of original Operating Instructions, English, KNF 121416-121419 07/18...

  • Page 28: Returns

    For optimal processing of a return, a copy of this declaration should be sent in advance via e-mail, regular mail, or fax to KNF Customer Service (refer to final page for address). In order to avoid endangering employees who open the shipment's packaging,...

  • Page 29: Health And Safety Clearance And Decontamination Form

    Diaphragm Vacuum Pumps N 920__.18 and N 920 KT.29.18G Health and safety clearance and decont. form 12. Health and safety clearance and decon- tamination form Translation of original Operating Instructions, English, KNF 121416-121419 07/18...
  • Page 32 KNF worldwide Please find our local KNF partners at: www.knf.com...

This manual is also suitable for:

N920 ap.29.18N920 kt.29.18g

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