User Manual
22
Version 1.0
9.4 Pumping Condensable Gases and Vapor.
If the vacuum system contains a small amount of condensable gas, open the gas ballast
valve, set the gas ballast to position I or II and keep the pump running for at least 30
minutes to pump the condensable gas effectively.
If the pump operates at low temperature, condensable gas may be dissolved within the
pump oil.
The oil may be emulsified or deteriorated which will affect the pump performance and
can even cause corrosion of the pump body.
The rise of the oil level during pump operation is a sign that of condensable gas is
contained within the vacuum system.
Keep the pump running with the gas ballast open and the intake port closed until all
gases are dissolved within the oil and removed.
