Diaphragm pump N922S_E IP54
Operation
Translation of Original Operating and Installation Instruction, english, KNF 318667-318664 05/21
23
WARNING
Risk of pump head bursting due to excessive
pressure increase
à
Do not exceed the maximum permissible op-
erating pressure (see
à
Monitor the pressure during operation.
à
If the pressure exceeds the maximum permis-
sible operating pressure of the pump: immedi-
ately switch off the pump and remedy the fault
(see Chapter
).
à
Only throttle or regulate the air or gas quantity
on the suction line to prevent the maximum
permissible operating pressure from being ex-
ceeded.
à
If the air quantity or gas quantity on the pres-
sure line is throttled or regulated, make sure
that the maximum permissible operating pres-
sure at the pump is not exceeded.
à
Ensure that the pump outlet is not closed or
restricted.
Excessive pressure, with all of the associated hazards, can be pre-
vented by means of a bypass line with a pressure relief valve be-
tween the pressure side and suction side of the pump. Further infor-
mation is available from KNF Customer Service (contact data: see
www.knf.com).
WARNING
Risk of dangerous gas mixtures during pump op-
eration if diaphragm breaks
If the diaphragm should break, the medium will
mix with the air in the compressor housing or in
the surroundings.
à
Stop pump immediately.
à
Replace the diaphragm prior to further opera-
tion (see Chapter
).
Operation with open suction-side gas connection can result in con-
taminants and objects being drawn in.
Pump stoppage
à
When the pump is at a standstill, establish normal atmospheric pres-
sure in the lines.
Vapors as medium The service life of the diaphragm can be extended, if no condensate forms
in the pump. Therefore:
à
Perform any work with saturated or near-saturated vapors only with a
warm pump.
à
KNF recommends: When pumping corrosive media, flush the pump
before switching off (see Chapter
) to extend
the service life of the diaphragm.
Summary of Contents for N922SPE
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