Vacuum Pumping Station
TBMG-7405
08/01/2001
- Content
A proposed valve unit called a "vacuum pumping station" would be incorporated into a plumbing system that supplies a vacuum for vacuum insulated cryogenic equipment. The vacuum pumping station is intended to perform functions now performed by, and to be a simpler and more reliable alternative to, an assembly of components that include a vacuum-pump-out valve and a separate vacuum-isolation valve (with a separate actuator) used to monitor vacuum levels. The present assembly includes a leak-prone threaded connection between the pump-out and isolation valve, and leaks can also occur at other locations. The vacuum pumping station would include a vacuum-pump-out port, a thermocouple port, a thermocouple-isolation valve, a pressure-relief valve, a pressure-relief port, and a single mechanism for actuating the pump-out, isolation, and pressure-relief functions of the valve. The number of joints where leaks could develop would be only half that of the present assembly.
- Citation
- "Vacuum Pumping Station," Mobility Engineering, August 1, 2001.