Diaphragm Vacuum Pumps N 920__.18 and N 920 KT.29.18G
Operation
Translation of original Operating Instructions, English, KNF 121416-121419 07/18
13
7. Operation
7.1. Preparing for Start-up
Before switching on the pump, observe the following points:
Operational requirements
Pump
All hoses attached properly
Fan openings not blocked
Specifications of the power supply correspond with
the data on the pump’s type plate.
The pump outlet is not closed or constricted.
When the gas ballast valve is open, no reactive,
explosive, or otherwise hazardous mixtures can
form (otherwise, contact KNF Service).
Tab. 6
7.2. Starting
Only operate the pump under the operating parameters and
conditions described in chapter 4, Technical data.
Make sure the pump is used properly (see chapter 2.1).
Make sure the pump is not used improperly (see chapter 2.2).
Observe the safety precautions (see chapter 3).
WARNING
Hazard of the pump head bursting due to excessive
pressure increase
Do not exceed max. permissible operating
pressure (see chapter 4).
Monitor pressure during operation.
If the pressure exceeds the maximum permissi-
ble operating pressure, immediately shut down
pump and eliminate fault (see chapter 9. Trou-
bleshooting).
Only throttle or regulate the air or gas quantity in
the suction line to prevent the maximum permis-
sible operating pressure from being exceeded.
If the air or gas quantity in the pressure line is
throttled or regulated, make sure that the maxi-
mum permissible operating pressure of the
pump is not exceeded.
Excessive pressure (with all of the related hazards) can be
prevented by placing a bypass line with a pressure-relief valve
between the pressure and suction side of the pump. For further
information, contact your KNF technical adviser.
With the pump at a standstill, open pressure and suction lines
to normal atmospheric pressure.
Pump standstill
Summary of Contents for N920 AP.18
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