Gas Ballasting A Pump With A Handle-Operated Gas Ballast Valve - Waters Xevo TQD Operator's, Overview And Maintenance Manual

2. Run the pump for 30 to 60 minutes.
The roughing pump temperature usually increases during
Tip:
ballasting. To maintain an ambient temperature of 40 °C (104 °F)
where the pump is located, ensure adequate ventilation.
3. Use the flat-blade screwdriver to turn the gas ballast valve to the closed,
, position.

Gas ballasting a pump with a handle-operated gas ballast valve

To gas ballast the roughing pump:
Warning:
roughing pump; it can be hot.
Caution:
• do not vent the instrument when the roughing pump is gas
ballasting.
• do not gas ballast the roughing pump while the instrument is in
Operate mode.
• avoid gas ballasting the roughing pump for more than 2 hours.
1. Move the gas ballast valve handle on the pump counterclockwise from
the horizontal position to the vertical position.
4-24 Maintenance Procedures
To avoid burn injuries, take great care while working with the
To avoid damage, follow these guidelines:
TP02654