Servicing
N 810/820/840.18 EX
26
Translation of original Operating Instructions, English, KNF 309515-309518 06/17
9. Servicing
9.1. Servicing Schedule
WARNING
Risk of explosion resulting from the formation of an
explosive atmosphere
Leaking connections can cause dangerous, explo-
sive atmospheres.
Ensure that diaphragms, valve plates/seals are
not damaged and are clean and correctly in-
stalled.
Check pneumatic connections on the pump for
leaks.
Take care during servicing work.
Immediately replace defective parts.
Component
Servicing interval
Pump
Regular inspection for external damage or
leaks
Diaphragm and
valve
plates/sealings
Replace at the latest, when pump output
decreases
Tab. 16
9.2. Cleaning
When cleaning, make sure that no liquids enter the inside of
the housing.
9.2.1.
Flushing Pump
WARNING
Risk of explosion when flushing the pump with air
If the pump is used with potentially explosive
media, have the pump flushed with an inert gas
only by an expert.
WARNING
Avoid damage to the pump and personal injury
caused by poisoning or explosion
When flushing the pump with inert gas, make
sure that the gas ballast valve is closed so no
reactive or explosive mixtures can form.
Before switching off the pump, flush it with air (if necessary for
safety reasons: with an inert gas) for about five minutes under
atmospheric conditions (ambient pressure).
9.2.2.
Cleaning Pump
Only clean pump with a damp cloth and non-flammable clean-
ing agents.
If compressed air is available, blow out the components.
