Diaphragm pump N87.9 EX
Servicing
Translation of Original Operation and Installation Instruction, english, KNF 323252 04/21
31
WARNING
Risk of explosion from formation of potentially ex-
plosive atmosphere
Leaky connections can result in dangerous poten-
tially explosive atmospheres.
à
Make certain that all elastomer parts are un-
damaged, clean and correctly installed.
à
Check the pneumatic connections of the pump
for leaks.
à
Work with care during service work.
à
Replace defective parts immediately.
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.
Removing the pump head
Fig.7 Marking with felt-tip pen
1. Mark the head plate, intermediate plate and housing with a felt-tip pen
( Fig. 7/1) to ensure proper mounting.
2. Remove the housing cover ( Fig. 7/3).
WARNING
Risk of explosion from damage
If the housing cover is bent or if the paint is dam-
aged, there is no risk of explosion.
à
Perform the work steps carefully and without
the use of force.
3. Loosen the four fastening screws (Fig. 4/2) and remove the housing
cover (Fig. 4/3).
The counterweight is visible.
