Fittings for tubing under low pressure (vacuum)
Fittings for tubing under low pressure (vacuum)
(OP)
Does anyone know if there is a flexible polymer tubing (in the 1/2" OD range) that can handle fluid flow inside at 80C under 27" Hg vacuum (about 50 Torr). If so, how to connect it (metal compression fitting, flared, barbed)? Most charts I see give vacuum ratings at 72F. Also, don't know the effects of vacuum inside on the reliability of the fitting connection.





RE: Fittings for tubing under low pressure (vacuum)
The issue with polymeric materials isn't the end connections, it's the permeability of the material itself as well as its structural strength against inward collapse.
A teflon hose with a crimped hose barb assembly will probably do the job. I would have no hesitation using the teflon hose with stainless overbraid that we use for pressures up to 3,000 psig, in a modest vacuum application at 80 C.
RE: Fittings for tubing under low pressure (vacuum)
RE: Fittings for tubing under low pressure (vacuum)
RE: Fittings for tubing under low pressure (vacuum)
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