1
2
Fig. 7:
Gas ballast valve
1 Cap of gas ballast valve
2
Gas ballast valve
Behavior with process gases with condensable vapors
► Operate the vacuum pump with gas ballast, i.e. with the gas ballast valve open.
Open gas ballast valve
► Rotate the cap to align both boreholes.
6.4 Pumping condensable vapors
Vapors or moisture from pumped media impair the throughput after condensation in the vacuum pump.
WARNING
Risk of explosion from reactive, explosive or other hazardous gas / air mixtures.
Uncontrolled inlet of gas at the flushing gas nozzle leads to sparks generated mechanically following
diaphragm rupture, hot surfaces or to explosive gas / air mixtures in the vacuum system caused by
static electricity.
► If necessary, use inert gas for supplying the flushing gas in order to avoid a potential ignition.
CAUTION
Risk of poisoning due to toxic process gases escaping
For intake pressures > 500 hPa, process gas may escape from the flushing gas nozzle.
► If necessary, use an extraction line.
Maximum inlet pressure
The maximum permissible inlet pressure at the flushing gas connection is 1,200 hPa abso-
lute.
Accessories required
● Flushing gas connection
PK 050 299
● DN 6 or DN 10 hose
Operation
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