4 Maintenance Procedures
68
December 6, 2012, 71500126802IVD Rev. C
Gas ballasting the roughing pump
Note:
This procedure is not required for an Alcatel oil-free roughing pump.
Roughing pump
The roughing pump draws large quantities of solvent vapors. The vapors tend
to condense in the pump oil, diminishing pumping efficiency. Gas ballasting
purges condensed contaminants from the oil.
Gas ballast the roughing pump when these conditions apply:
•
With ESI operation, once a week.
•
When the roughing pump oil appears cloudy.
•
When the vacuum pressure is higher than normal.
•
When condensate forms in the roughing pump exhaust line.
•
When you change the roughing pump oil.
Your roughing pump can be fitted with either of the following:
•
A screwdriver-operated gas ballast valve. See
.
Caution:
Failure to routinely gas ballast the roughing pump shortens
oil life and, consequently, pump life.
TP02689
Oil filler plug
Oil-level sight glass
Drain plug
Gas ballast valve
Exhaust port flange
Summary of Contents for TQ
Page 34: ...1 Waters TQ Detector 34 December 6 2012 71500126802IVD Rev C...
Page 144: ...4 Maintenance Procedures 144 December 6 2012 71500126802IVD Rev C...
Page 156: ...A Safety Advisories 156 December 6 2012 71500126802IVD Rev C...
Page 188: ...B External Connections 188 December 6 2012 71500126802IVD Rev C...
Page 192: ...C Materials of Construction and Compliant Solvents 192 December 6 2012 71500126802IVD Rev C...