KNF N85.3 - Servicing

Diaphragm pump N85, N86 Servicing
Translation of original Operating and Installation Instructions, english, KNF 121258-121528 01/20 27
9. Servicing
9.1. Servicing schedule
Component
Servicing interval
Pump
-
Regular inspection for external dam-
age or leaks
Hose connections
-
Regular inspection for external dam-
age or leaks
Diaphragm and valve
plates
- Replace when pumping capacity
decreases, or sooner
Silencer (accessory)
-
Change if it is dirty
Tab. 16
9.2. Cleaning
When cleaning, make sure that no liquids enter the inside of
t
he housing.
9.2.1. Flushing pump
 Before switching off the pump, flush it with air (or with inert gas
if required for safety reasons) under atmospheric conditions
(ambient pressure) for about five minutes.
9.2.2. Cleaning pump
 Pump disconnected from mains and de-energized.
WARNING
Dangerous substances in the pump can
c
ause a health hazard.
D
epending on the substance transferred, caustic
b
urns or poisoning are possible.

Wear protective clothing if necessary, e.g. pro-
tective gloves.

Take the proper steps to clean the pump.
CAUTION
Danger of burns from hot pump parts
T
he pump head or motor may be hot even after the
p
ump has been shut off.

Allow the pump to cool off after operation.
 Solvent should be used for cleaning only if the head materials
are not corroded (ensure compatibility of the material).
 If compressed air is available, blow out the parts.
Requirements