Operation
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300314330_002_C7 - 05/2021 - © Leybold
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Interlock the process valve to close when the process pump stops.
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Vent the system to atmospheric pressure using the respective purge gas.
■
Purge the system for at least 15 minutes by opening all installed purge gas
valves. With no purge gas connected to the pump, use a gas flow from the
process side or a separate gas cylinder to purge the pump for at least 15
minutes.
■
In no event, drain the lubricant.
■
Shut off the purge.
■
Disconnect the pump exhaust and inlet and fit a metal ISO / NW blanking
plate.
■
Disconnect the purge gas supply and seal.
■
The pump can now be removed to a workshop for decontamination and
repair.
4.6 Removing from Service
Shut off and vent the pump system as described in Section 4.5.
Clean the pump system of any substances which may lead to corrosion. (e.g.
by extended purge).
Flood it with nitrogen or dry purge gas, add desiccant and seal it.
Remove the cooling water from the pump system.
Remove the cooling water hoses from the pump and drain the cool ing water.
Blow out the cooling water coils with compressed air or Nitrogen (
max. 4
bar
). Blow into the cooling water inlet port only.
Also when storing the pump for longer periods of time the lubricant remains
in the pump.
Drain cooling water
