Interesting and possible. Though the pump was able to achieve an ultimate pressure of approximately 10^-1 TOR in the chamber. A tech stated it is impossible to determine which way the wanes are supposed to go after taking it apart and assembling previously, so a possible fault.
Clarification, the pump is the Leybold-Heraeus Trivac D30A. A manual is available at manualslib.
https://www.manualslib.com/products/Leybold-Trivac-D30a-8859916.html
The pump has an anti-suck back mechanism to prevent the oil from escaping when turned off.
I may not recall the exact number properly, but will check as soon as possible.
It is one of Leybold's Trivac models, but decades old. Probably the D16 or close.
https://www.leyboldproducts.de/en/products/oil-sealed-vacuum-pumps/trivac/trivac-b/pumps/691/trivac-d-16-b-dot
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...
Yes! This looks like it avoids the problem of having to make a groove inside the enclosure, from the link by Baluncore.
Question with this design is whether there should be additional o-ring somewhere to cover the outer hole. In the picture, the o-ring is covering two holes at the same time...
Thank you. The seals are not from Trelleborg, but from Eriks. For some reason the term is used here for the seals.
For now the issue was fixed by applying additional pressure to the face of the seal and using vacuum grease generously. The vacuum pump cover uses similar technique for sealing...
The task at hand is to seal a rotating shaft with high vacuum (10^-5 tor) on one side using a STEFA rotary shaft seal.
The STEFA is basic and look reminiscent of the one below.
Are there guides for choosing the dimensions of the enclosure, similar to the O-ring guide used for O-ring seals...
I have a high voltage source feeding a cable which is attached to the ceiling with plastic hooks, finally descending to the properly isolated source. The high voltage output is a typical terminal that the cable is connected to.
When the supply is turned on, some spark like sounds emerge from...
Thank you!
The chamber is small, maybe around 20 litres made from stainless steel. The holes are circle shaped on a flat surface. Previously some o-ring based solution was used which worked.
The ultimate pressure should be in the range of 10^-7 mbar, achieved with a diffusion pump.
In all...
There is a very low pressure vacuum chamber with two small round holes on it, around an inch or so for inlets. What are the options for
1) Sealing the holes air tight
2) Sealing the holes air tight with inlet for low voltage electricity into the chamber.
I have been trying to search for ready...