Diaphragm pump N96 Servicing
Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
27
9.3 Replacing diaphragm and valve plates
Requirements
à
Disconnect the pump from mains and ensure that it is voltage-free.
à
Clean the pump and free the pump of hazardous materials.
à
Remove the hoses from the pneumatic pump inlet and outlet.
Spare parts/tools
Spare part/tool Quantity
Spare part set* 1
Torx TX10 screwdriver 1
Tab.27 *acc. to Chapter 11 Spare parts and accessories
Information on the procedure Diaphragm and valve plates/seals are the only wear parts in the pumps.
They are easy to replace.
Valve plates/seals and diaphragm should generally be replaced at the
same time. If the diaphragm is not replaced at the same time as the valve
plates/seals, the specified output of the pump can no longer be ensured af-
ter the maintenance is performed.
WARNING
Health hazard due to dangerous substances in the
pump
Depending on the medium being transferred,
caustic burns or poisoning is possible.
àWear protective equipment if necessary, e.g.,
protective gloves, goggles.
àClean 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.
The diaphragm and valve plates/seals are to be replaced in the following
order:
a.) Preparatory steps
b.) Remove pump head
c.) Replace diaphragm
d.) Replace valve plates/seals
e.) Mount pump head
f.) Final steps
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