Trying to connect a roughing pump to an oil diffusion pump. I have some reinforced flexible vinyl tubing what would using that as my connection limit my pressure to?
Also, what pressure would the use of j b weld (baked) limit a vacuum chamber to?
Vinyl tubes and j b weld
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- Dennis P Brown
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Re: Vinyl tubes and j b weld
JB weld has uses but rarely (if ever) in high vacuum. For securing a foreline to a diffusion pump or mechanical vacuum pump, maybe. One needs as little as possble exposed to the vacuum environment. Not a good idea to bake expoxy securing metal - the thermal expansion difference tends to break any seal.
As for standard vinyl tubing, that will not really work; it will collapse and due to plasticizers, will out gass terribly. Thick vacuum grade rubber hose or vacuum grade vinyl tubing with metal coils are prefered for those applications.
As for standard vinyl tubing, that will not really work; it will collapse and due to plasticizers, will out gass terribly. Thick vacuum grade rubber hose or vacuum grade vinyl tubing with metal coils are prefered for those applications.
Re: Vinyl tubes and j b weld
Vac-Torr is a high vacuum epoxy seal that is designed for high vacuum use. There is a less expensive Loctite product that is an equivalent formulation, but the number escapes me at the moment. Anyone else remember?
Re: Vinyl tubes and j b weld
Loctite Hysol 1C. It has been discussed at length on this forum in the vacuum FAQ’s.
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Re: Vinyl tubes and j b weld
Thank you!