Gas Pressure - Need Switch that engages when pressurized 1

[Bigboss987]

Hey Guys.

I am looking for a switch or a sort of system that when pressurized, a switch will engage. I know there are simple pressure switches out there. But I cannot find on that I am looking for in particular.

The gas tube will pressurize with about 10-15k PSI. The gas travels down and 11" stainless steel tube.

I need there to be a mechanism at the end that when pressurized a piston will expand or engage. I just need the switch to activate when pressurized and release when pressure is gone.

Do any of you know of a system like this that I could use. Needs to be fairly small with the area that I will be using.

 

[ScottyUK]

There are plenty manufacturers with pressure switch offerings in that pressure range, so why try to design your own solution to a problem others have already solved and had approved? Is there something about your application which isn't immediately apparent from the description so far?

 

[flash3780]

It's not really my field, but are you looking for something like this:

http://www.barksdale.com/en/products/section/pressure-switches/mechanical/bourdon/

 

[Bigboss987]

I need something smaller actually. I was thinking a spring loaded to always be collapsed and when pressure built up it would engage. Then when pressure went away, the spring would collapse it again. Doesn't need to be precise. Just kind of like an on off switch the engages.

 

[MikeHalloran]

At 0 psi to 10k psi, you may not need a penetration at all.
I.e., the pressure containing structure may deflect enough to trip a microswitch without needing a seal or piston.

...

If you are talking about a tube that's 11 inches long, not 11 inches in diameter, you could introduce a loop, turning the tube itself into a crude Bourdon tube.

If you are talking about a tube that's 11 inches in diameter, you've basically got a cannon barrel there.

In either case, you would be money ahead to engage some local engineering help, since you appear to be in way over your head, no offense intended.



Mike Halloran
Pembroke Pines, FL, USA