Servicing
Diaphragm pump N026 EX
28
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
Tool and material
Quantity
Tool/material
1
Allen key, 4 mm
1
Screwdriver blade width 4.5 mm
1
Adjustable face spanner wrench for nuts with two holes or
KNF wrench for retainer plate (see
Thread locker
(DELO ML 5249 or comparable product)
1
Pencil
Tab. 33
Information on the procedure
à
Always replace diaphragm, reed valves and O-rings together to main-
tain the performance of the pump.
With multi-headed pumps, parts may be interchanged between the individ-
ual pump heads.
à
Replace the diaphragm and reed valves of the individual pump heads
in sequence.
WARNING
Risk of explosion from formation of potentially ex-
plosive atmosphere
Leaky connections can result in dangerous explo-
sive atmospheres.
à
Make sure that diaphragm, valve plates/seals,
and O-ring are installed undamaged, cleanly
and correctly.
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.
Work steps
The following item numbers refer to Fig. 5.
1. Only for two-headed pumps:
Open the pneumatic connection between the two heads; loosen one of
the union nuts to do this; take care not to kink the connecting hose.
2. Removing the housing cover (H):
