Diaphragm pump N026 EX
Servicing
Translation of Original Operation and Installation Instruction, english, KNF 059217 11/19
27
9.2 Cleaning
9.2.1 Flushing the pump
WARNING
Risk of explosion by flushing the pump with air
à
In potentially explosive areas or when using
the pump with explosive media, only permit
specialist to flush the pump with inert gas.
à
Before switching off the pump under atmospheric conditions, flush for
several minutes with inert gas.
If there is no risk of explosion, flushing can also be performed with
air.
9.2.2 Cleaning the pump
WARNING
Risk of explosion from electrostatic charging of the
components
à
Only clean the pump with a damp cloth.
à
Only clean the pump with a damp cloth and non-flammable cleaning
agents.
à
If compressed air is present, blow out the components.
9.3 Changing diaphragm and reed valves/valve plate(s)
The sequence of work steps varies depending on pump version:
à
Pump models with reed valves, see Chapter
à
Pump models with valve plates, see Chapter
In case of doubt, please contact KNF Customer Service (have serial num-
ber of the pump ready).
9.3.1 Pump models with reed valves
Requirements
à
Disconnect the motor from mains and ensure that it is voltage-free.
à
Free the pump of hazardous materials.
Spare parts
Spare part*
Position designation** Number per pump
head
Diaphragm
(F)
1
Reed valve (stainless
steel)
(M)
2
O-ring
(B)
2
Tab. 31 *According to spare parts list, Chapter
**According to
Fig. 5
