Servicing
Diaphragm pump N87.9 EX
30
Translation of Original Operation and Installation Instruction, english, KNF 323252 04/21
3. Properly dispose of the replaced structured diaphragm and valve
plates/seals.
To ensure the required gas tightness of the pump following servic-
ing, a leak test is to be performed.
WARNING
Risk of explosion from leaks
à
Before recommissioning the pump, check the
pump heads and pneumatic connections for
leaks. Leaks may lead to a risk of explosion.
WARNING
Risk of injury and poisoning from leaks
à
Before recommissioning the pump, check the
pump heads and pneumatic connections for
leaks. Leaks may lead to poisoning, chemical
burns or similar injuries.
Before recommissioning, observe the applicable standards, guide-
lines, regulations and technical standards at the electrical connec-
tion.
9.4 Changing the structured diaphragm and valve plates/
seals (S_-/A_ design based on project)
Requirements
à
Disconnect the motor from mains and ensure that it is voltage-free.
à
Clean the pump and free the pump of hazardous materials.
Spare parts
Spare part*
Item designation**
Number per pump
head
Structured diaphragm
(7) in Fig. 8
1
Valve plates/seals
(12) in Fig. 8
2
Tab.17 *According to spare parts list, Chapter 11.1 Spare parts
Tool and material
Quantity
Tool/material
1
TORX® screwdriver T20
1
Phillips screwdriver
Thread locker
(Loctite 222 or comparable product)
1
Felt-tip pen
Tab.18
Information on the procedure
à
Always replace diaphragm and valve plate/seals together to maintain
the performance of the pump.
