Diaphragm liquid pump NF 25, NFB 25
Servicing
KNF Flodos AG BA_NF25_NFB25_EN_07_159615
Translated from the Original Operating and Installation Instructions
19
8. Servicing
8.1. Servicing schedule
Component
Servicing interval
Pump
-
Regular inspection for external
damage or leaks
Pump head
-
Clean if the flow rate decreases, the
pump does not work or no vacuum
is created (Chapter 8.2)
Diaphragm, valve
plates and seals
-
Change as soon as pumping capac-
ity decreases, preferably sooner
Tab. 11
8.2. Cleaning and dismantling
WARNING
Health hazard due to dangerous
substances in the pump
Depending on the medium transferred, caustic burns
or poisoning are possible.
Wear protective clothing if necessary, e.g. pro-
tective gloves.
Flush the pump with a neutral liquid and pump
empty.
With NFB pumps, make sure that both pump
heads are flushed.
With NFB pumps the necessary steps are repeated for the
second pump head.
8.2.1. Flushing the pump
If transferring aggressive media, KNF recommends flushing
the pump with a neutral fluid under atmospheric conditions for
a few minutes before switching off, to extend the service life of
valves and diaphragm.
8.2.2. Preparations for disassembly
Flush the pump with a suitable neutralising liquid, and make
sure that no dangerous substances are left in the pump.
Pump empty.
Separate electrical connections.
Disconnect hoses from pump head.
Qty
Tools
1
T6 Torx screwdriver
Tab. 12
Information on procedure
Tools
