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Vent Valve Installation
It is possible to use the vent port on the envelope to connect an
external vent valve: unscrew the threaded plug and screw the vent
valve into the pump.
Pump Purging and Venting
Models 969-8888 and 969-8889 are equipped with an integrated
purging and venting valve device. Both valves are fed through a
single gas port, with 1/8 NPT thread or Swagelok connector.
Purge and Vent Installation
To install the gas purge and vent line it is necessary to unscrew the
purge/vent port cover, and then connect the gas line.
Reason to Purge the Turbo-V 3K-G Pump during
Operation
Keep the gas purge on at all times during pump operation, during
stops, and even if there is no flow of aggressive gases.
This will keep the pressure in the bearings area higher than in the
foreline and will prevent pollution or powder from flowing back,
mainly into the bear-ings area.
Therefore, to prevent contamination and damage to the bearings, an
inert gas must flow into the pump body around the upper bearing
towards the forevacuum line.
Disrespect of these simple, basic rules may cause seriously damage the pump
CAUTION!
bearings and void pump warranty.
Turbo-V 3K-G Pumping System User Manual / 87-901-011-01
Technical Information
Vent Valve Installation
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