OPV plug failed open at 120psi

[guruboy]

Just so people are clear, we're taking about an OPV insert/plug like the kind you would put on a Drysuit inflator 1st stage.

So based on my random failure not due to high IP, this would have caused a complete loss of Drysuit inflation gas (if valve is not shutoff).

 

[Bob DBF]

As I remember the valve relys on spring pressure, if the spring weakens for any reason, the relief pressure would lower and free flow.


Bob

 

[tbone1004]

the seat could also be an issue if it took too much of a set and is releasing early, similar to a regulator

 

[guruboy]

Apparently DGX now sells the OPV as user adjustable.

The one I had that failed was not user adjustable but it looks like it has a hex head. I'll try and see if I can "adjust" it back to a reasonable IP level.

 

[rhwestfall]

made by XS-Scuba -

Rebuildable & Adjustable OPV Over Pressure Valve

available a a few re-sellers

 

[guruboy]

made by XS-Scuba -

Rebuildable & Adjustable OPV Over Pressure Valve

available a a few re-sellers

$25 at LP

 

[guruboy]

My current theory is that I have a "user adjustable" valve (even though it wasn't sold as one) and the IP setting got "shaken" loose over time.

 

[guruboy]

Turns out my theory was correct. I do have an adjustable OPV even though it wasn't described as such.

Uses a 3mm hex

I adjusted it in until flush with the edges.

Not sure what IP this is, but it stopped leaking at 120psi.

 

[guruboy]

Looks like my OPV valve is starting to wear out again. It is blowing at 120psi with the settings in my previous post. Now I have to screw it in all the way to seal at 120psi.

Maybe the spring inside is failing?

 

[guruboy]

Maybe I'll get one of the "rebuildable" ones for $25. Not sure how it can be "rebuilt" though

XS Scuba Rebuildable & Adjustable OPV - Over Pressure Valve