KNF N 143 AN.12 E, Инструкция по эксплуатации и установке

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Servicing Diaphragm Pumps N 143/186.12
20 Translation of original Operating and Installation Instructions, english, KNF 121610-121613 07/16
8. Servicing
8.1. Servicing schedule
Component Servicing interval
Pump
-
Regular inspection for external dam-
age or leaks
Tube connection
-
Regular inspection for external dam-
age or leaks
Working diaphragm,
safety diaphragm
and valve plate - Replace if the pressure in innerspace
(evacuated) between the working dia-
phragm and the safety diaphragm de-
creases (working diaphragm has bro-
ken)
- Replace if pump's pressure or flow
rate change without apparent reason
- Replace at the latest, when pump
output decreases
Tab. 13
8.2. Cleaning
8.2.1. Flushing pump

KNF recommends: When transferring aggressive media, flush
the pump under atmospheric conditions some minutes with air
(or, if necessary for safety reasons, with an inert gas) prior to
switch-off to increase the service life of the diaphragm.
8.2.2. Cleaning pump

Only use solvents for cleaning if the head materials cannot be
attacked (check the resistance of the material).

If compressed air is available, blow out the components.
8.3. Replacing working diaphragm, safety dia-
phragm and valve plate

Motor disconnected from mains and de-energized

Pump clean and free of dangerous substances

Tubes/pipes
removed from pump’s pneumatic inlet and
outlet
WARNING
There is the danger that hazardous gas mixtures will
form and that the pumped media will leak from the
pump while the pump is in operation, if the safety
diaphragm is not replaced at the same time as the
working diaphragm.

Always replace the safety diaphragm at the
same time the working diaphragm is replaced.

Always replace working diaphragm and safety diaphragm
together to maintain performance and safety of the pump.
Conditions
Information on procedure