Service kit / O-ring spec for PST HP Steel Tanks & Sherwood Genesis 5k psi valve

[mathauck0814]

Does anyone know what size O-rings are required for the valves shipped commonly on the HP PST steel tanks? Specifically looking for the tank neck O-ring. I've struck out finding viton/O2 compatible service kits so I'm hoping they're standard sizes that I can cobble up.

 

[dytis-sm]

did you ever find any? I am looking for some too...

 

[zider]

The o-ring size is 116. I get them for my Genesis HP100 from John at NESS.

HP Tank Neck O-Rings - Viton - Northeast Scuba Supply

 

[dytis-sm]

That is not it however... My tank has a PST pro-valve (convertible to DIN) marked 3442 psi and the link you sent me states that it is for valves marked 3500 psi. I never realized what a challenge it will be finding an o-ring for this tank. I have been looking for a while without success. Even my LDS picked up a few of those brown Vitons that supposed to match only to be a mismatch too. Needless to add that the generic kits have none that fits it.

Any suggestions? This is a convertible valve so I assume I can always buy a new adapter ?

 

[Dr. Lecter]

3500psi tanks have narrower threaded neck that takes a smaller tank neck o-ring. 3442psi tanks use the same standard 3/4" threading on their valves and the same tank neck o-ring as most tanks. What you want are these LP Tank Neck O-Rings - Viton - Northeast Scuba Supply

If you're talking about the o-rings for the adaptor faces, the one that goes into the tank valve side is a DIN o-ring, and the one that sits facing outside to mate with the yoke reg is a regular old yoke o-ring.

 

[dytis-sm]

3500psi tanks have narrower threaded neck that takes a smaller tank neck o-ring. 3442psi tanks use the same standard 3/4" threading on their valves and the same tank neck o-ring as most tanks. What you want are these LP Tank Neck O-Rings - Viton - Northeast Scuba Supply

If you're talking about the o-rings for the adaptor faces, the one that goes into the tank valve side is a DIN o-ring, and the one that sits facing outside to mate with the yoke reg is a regular old yoke o-ring.

Oops... yeah the o-ring I am looking for is not for the neck but for the yoke face. That is the one I have been looking and cannot find. Sorry for the confusion. Mixed up the O-rings.

 

[Dr. Lecter]

Some info for you here: http://www.scubaboard.com/forums/tanks-valves-bands/321026-o-ring-size-din-yoke-converter.html These shouldn't be mfgr specific sized o-rings since they and the insert are working with universal DIN valves and universal yoke regs, but yeah, worst case scenario... just buy a new generic insert.

 

[redacted]

Oops... yeah the o-ring I am looking for is not for the neck but for the yoke face. That is the one I have been looking and cannot find. Sorry for the confusion. Mixed up the O-rings.

111s or 112s should do the job. There are 2 clearly different sizes in common use.

 

[dytis-sm]

111s or 112s should do the job. There are 2 clearly different sizes in common use.

Yeap it is the 111 ! Thanks