G 04128 - Edition 02 - July 12
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C 00
Safety recommendations
for harsh processes
All process pumps are designed for continuous operation in pumping process gas and
should not be stopped.
adixen Vacuum Products will be released from any warranty and liability claims if a process pump
is stopped for a prolonged time leading to condensation of by-products, powder build-up or
corrosion inside the pump.
The only guaranteed solution by adixen Vacuum Products to restart a process pump after a
prolonged stop is to perform a complete overhaul of the pump.
Despite this recommendation, if the pump is shut down for a prolonged time, it is advisable to
follow the precautions below-mentioned in order to reduce the risks of condensation, powder
build-up and corrosion inside the pump.
From the process chamber, flush the pump using a dry inert gas, such as Nitrogen, through the
inlet port during 30 minutes.
Stop inert gas supply and let the pump running at ultimate pressure for 5 minutes.
Stop the pump and close inlet port with the appropriate blank-off flange.
If the pump is equipped with a monitoring system, configure N2 prolonged option in the
menu and set it on 30 minutes, then perform a cycle start/stop of the pump. Wait till end of
purge prolonged cycle (30 minutes).
Put appropriate blanck-off flange at exhaust of the pump.
Turn off the cooling water supply.
When the pump will need to be back in operation, the following points need to be observed :
Remove the exhaust and inlet blank-off flanges and connect the pump to the equipment.
Turn on the cooling water.
Power on the pump and press start button.
In case of trouble to restart the pump, contact
adixen Customer Service
.
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Shutdown procedure for discontinuous operation
adixen Vacuum Products – A3H Series Operating instructions
