Huma regulator o-ring size(AT-44)?

[Rallyshark]

I was wondering if any of you guys can tell me the size of the o-rings on my Huma reg in my AT-44?  My regulated cylinder has developed a slow leak, and I'm pretty it is going to be the o-ring that seals the regulator to the wall of the air cylinder.  I say that, because I boogered up the one that was on it last time I took the reg out, and had to use a thicker o-ring with a smaller diameter stretched out to fit.  I know, bad move on my part  

The leak is pretty slow, but that is a known area I need to correct, so that sounds like the best place to start.  I have the threads of my valve notched to vent the reg, so I'm betting replacing the regulator's o-rings will likely solve my minor issue.  I say minor, because it is only losing about 10 bar a week, which wouldn't really be an issue if I were shooting and filling.  I know I could probably get a set from Air Superiority, or Baxter, or some of the other folks.  The Ace Hardware by my house has a great selection of o-rings, including metric, so I can likely go grab them there...  Thanks in advance guys!

[blackdiesel]

Maybe you can ask Nick.  I'm sure if he knows he would share the knowledge.  Personally, I can never get metric sizes down. 

[Rallyshark]

I've had a hard time reaching him the last couple of times I tried.  I emailed once, and called and left a voicemail once.  That was back when I took my reg apart to clean up the moisture damage.  I'm sure he was just busy.  I'm hoping someone will chime in with the sizes, because I think the odds are good I can get them locally.  The Ace close to me has a very good selection, and there are numerous hydraulic parts places around too.  I may try and call him tomorrow, if I don't get any info. on here by then. 

On a side note, we need to go shooting man, but scheduling hasn't been on our side lately...

[blackdiesel]

I know.  Work has been crazy for me the last few weeks.  This is the last month for our performance review so after April 1st my schedule will be a lot more flexible.  On a side note: the shooting place has been cleared of junk for almost a month now.  I went out for a couple of hours last weekend just to clear my head and for some casual plinking. 

[blackdiesel]

Crazy was just reading a post on another forum and someone had the same issue.  Here are the sizes: "I emailed Huma to get the oring specs so I can have spares. If anyone is interested the valve body oring is 15mmx2mm and the plenum oring is 14.5mmx1.5mm. both 70 dur."

[Rallyshark]

Same here man, just had too much going on lately.  That's good they cleaned up the spot!  I will swing by Ace today after work hopefully to see if they have them   Thanks for the input!

[Rallyshark]

Crazy was just reading a post on another forum and someone had the same issue.  Here are the sizes: "I emailed Huma to get the oring specs so I can have spares. If anyone is interested the valve body oring is 15mmx2mm and the plenum oring is 14.5mmx1.5mm. both 70 dur."

I could be wrong, but I think those numbers are the the one that seals against the plenum, and the one that seals against the valve face.  The one I most likely need is the one that seals against the wall of the air cylinder, and it is larger than the two listed.  I figured that out when I went to pick them up at the hardware store today...  On a good note, I was able to reach Nick, and he is going to send me a full set   He wasn't sure on the size, since he gets them as a kit from Huma, and the sizes aren't listed from Huma he said.

[dcorvino]

Glad to hear Nick took care of you.
He is a good guy.

Dave

[Rallyshark]

Oh yeah!  I know he is busy, but in the end, he has always gone out of his way to help

[Masochisti]

I mailed Huub@huma-air.com and got this response:

"The internal o-rings are 5,5x1,5 and 12,5x1,5 nbr 70shore
Those are the only rings what will wear out during time.

The external, are 2mm  nbr 70 shore. Please measure the diameter of the o-ring grove i don't have it in my head.

Cheers huub"

[Rallyshark]

I'll measure the ones I get from Nick, and then I should be able to know for certain for future reference.  Thanks!