Hi
Has anyone on the list used Swagelok compression fittings in service with
LOX (3/4 or 1 in)? I've used AN (37 deg flare) and NPT fittings
successfully for LOX. NPT fittings are wrapped with PTFE tape. My entire
LOX side on my test stand is all AN expect for the NPT adapters used on the
main LOX valve and LOX load valve. Any LOX experience with any other brand
of compression fittings (Parker, etc). I'm looking at changing the stand
plumbing and am considering Swagelok. Check out our Facebook page
https://www.facebook.com/midwestpropulsiongroup to see the stand in action.
The Army missile spec forbids NPT fittings. Most likely reason is they
could vibrate loose. I've seem amateur liquid systems using NPT fittings
successfully. Any advice would be appreciated. On my first test stand, I
welded the NPT fittings together. It worked but looked pretty bad. An A&P
I know suggested safety wiring the NPTs so they would come loose. That is a
lot of work.
I'm lucky. My outbuilding is also my rocket workshop. When I want to
escape I run out back for a few hours. Thanks and everyone take care.
Be Safe,
Rick Wills
Huber Heights, Ohio