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"Zener" style check valve

"Zener" style check valve

"Zener" style check valve

(OP)
Is anyone aware of a miniature check valve that has an adjustable breakdown pressure for reverse flow?  By that, I mean a check valve that functions like a zener diode and would fit on .25" OD rubber/plastic tubing.

I've had no luck finding this amongst the small pneumatic equipment suppliers I'm used to dealing with.

Thanks,

Vidaman

RE: "Zener" style check valve

I'm not sure if I know what you want, but I believe that these are usually called flow limiters.   They allow flow up to a certain point and then slam shut.

RE: "Zener" style check valve

I'm far more versed in hydraulics than pneumatics but it seem what you're looking for is an adjustable relief valve referenced to absolute (or atmospheric) pressure.

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