BSPP teflon sealing washer for high pressure gas. What are they called? Please help!

[steve-l]

When using high pressure BSPP fittings either bottom or top seals are needed. If on top, the fitting will have a flange under which a sealing ring or washer is often used, They can be soft copper, teflon , aluminum or a Dowty seal. Some other BSPP threads seal in the threaded hole like for pressure gauges. They can be also be made of various materials, but it is those I want to buy. What are they called?

This thread was closed a moment ago by Don for he said "the thread title was meaningless" I need the name of these teflon sealing washers in order to find a supplier.

 

[deltap]

You might try a refrigeration supplier. They have square teflon rings specific to their fittings.

 

[Booze Daily]

I use the Teflon ones to hook CO2 to my beer keg.
I get them at the welding supply place.

 

[technocrat]

Try CGA gaskets or CGA regulator gaskets

 

[Cole2534]

I use the Teflon ones to hook CO2 to my beer keg.
I get them at the welding supply place.

In a pinch I made some from delrin or hdpe, that also worked well.

 

[steve-l]

In the past, I have made them myself for the simple reason that I could not find a bulk supplier. Yes, some welding supply houses will carry those that fit gas regulators, but not in all sizes. I'm pretty sure they have a name, so I can do a global search, but so far I have had no luck. I have also used delrin and HDPE, but Teflon works much better.. When using other plastics, gasket creep becomes an issue and over time the seal leaks, requiring more torque on the crushing fitting.