KNF N630.12, Translation Of Original Operating And Installation Instructions, Page: 41 / 88

Diaphragm pump N630.12 Servicing
Translation of Original Operating and Installation Instruction, english, KNF 318761-318764 02/22 41
8.3 Changing diaphragm and reed valves
Requirements
à
Disconnect the motor from mains and ensure that it is voltage-free.
à
Allow the pump and the motor to cool.
à
Clean the pump and free the pump of hazardous materials.
à
Remove the hoses/pipes from the pneumatic pump inlet and outlet.
WARNING
Risk of dangerous gas mixtures and leakage of
the medium being transferred from the pump dur-
ing pump operation if the safety diaphragm is not
changed at the same time as the working di-
aphragm.
à
If the working diaphragm is changed, always
change the safety diaphragm at the same
time.
WARNING
Health hazard due to dangerous substances in the
pump
Depending on the medium being transferred,
caustic burns or poisoning is possible.
à
Wear protective equipment if necessary, e.g.,
protective gloves, goggles.
à
Clean the pump with suitable measures.
CAUTION
Risk of burns from hot pump parts
The pump head or motor may still be hot after op-
eration of the pump.
à
Allow the pump to cool after operation.
For two-headed pumps:
Servicing work should generally be performed on both heads at the
same time.
à
Always replace the working diaphragm and safety diaphragm together
so as to maintain the performance and safety of the pump.
With multi-headed pumps, the parts of the various pump heads could get
mixed up.
à
Change the parts of the individual pump heads that are to be replaced
one after the next.