- #1
zaillian
- 10
- 1
I have an old mechanical vacuum pump that is discharging a lot of oil (half a gallon was found after some use) through its inlet, with enough force to move at least a few inches vertically. The pump is used in conjunction with a diffusion pump and the discharge ruined its oil. The pump also creates lot of oil mist, but this is not a problem.
I would like to hear ideas what causes the discharge and how to prevent it.
Possibly the issue is that the pump has been shut off, which after the air has been let into the chamber with the inlet open sucking oil from the pump. Then the issue is solved by making sure the valves are always shut off when filling the chamber with air. Anyone else having had this problem?
I would like to hear ideas what causes the discharge and how to prevent it.
Possibly the issue is that the pump has been shut off, which after the air has been let into the chamber with the inlet open sucking oil from the pump. Then the issue is solved by making sure the valves are always shut off when filling the chamber with air. Anyone else having had this problem?