Diaphragm pump N96 Operation
Translation of Original Operating and Installation Instruction, English, KNF 316836-316838 01/20
23
à
The pumps are built-in devices. Before they are commissioned, it must
be ensured that the machines or systems into which the pumps are in-
stalled comply with the relevant provisions.
WARNING
Risk of pump head bursting due to excessive
pressure increase
àDo not exceed the maximum permissible op-
erating pressure (see 4 Technical data).
àMonitor the pressure during operation.
àIf the pressure exceeds the maximum permis-
sible operating pressure of the pump: immedi-
ately switch off the pump and remedy the fault
(see Chapter 10 Troubleshooting).
àOnly throttle or regulate the air or gas quantity
on the suction line to prevent the maximum
permissible operating pressure from being ex-
ceeded.
àIf 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.
àEnsure 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.
àStop pump immediately.
àReplace the diaphragm prior to further opera-
tion (see Chapter 9 Servicing).
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 9.2.1 Flushing the pump) to extend
the service life of the diaphragm.
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