Lets talk about o-rings
I just ordered a bunch of o-rings from The O-Ring Store, but in hindsight I have some questions.
All of the o-rings I purchased are Buna-N 70’s, which are supposed to be the most commonly used o-ring in hydraulic/pneumatic motors, cylinders, pumps and valves. However, the Buna-N 90’s are listed for high pressure applications.
Should I have bought the 90’s for anything that is used under high pressure, such as the fill probe/regulator/etc?
For the life of me, I couldn’t find 3 x 25.2 o-rings anywhere. I bought 3 x 25.5 and 3 x 25, but again in hindsight, these appear to be in an area of high pressure (part #16 according to the owners manual). Should I continue the search? If so, where can I find them?
I see that there is no listing of the o-ring size for the barrel shroud. Does anyone know what size it is?
I also see that the fill probe o-ring size is not listed in the owners manual. I measured the spares that came with the gun:
1.8 x 4.5
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Viewing 9 replies - 1 through 9 (of 9 total)
:hoot:
Dear CPU…
Thanks for the link. Ernest Rowe to the rescue!!! Has just what I need…what a good guy he is!!!!
Hoot:
Might as well get a full kit Hoot.
Just select the right cal when buying.
http://www.biggo.co.uk/airgun-technology-vulcan-o-ring-kit-32-p.asp
Some kind owner of a Vulcan should chime in soon to help you get only the one (s) you need, I’m hoping………
– Greg
:hoot:
Here’s my question…is there an O-ring kit for the Vulcan? I don’t want to buy 50pc of the dang things.
I have a slow leak in my Vulcan. I checked the air gauge assembly and it looked fine so I put it back and submerged it, no bubbles. So…I am guessing the O rings in the reg or the valve need replacing.
Is there anywhere I can get just the O-rings I need?
Regards,
Kindly ‘Ol Uncle Hoot:
Thanks Greg. What a relief as I didn’t want to surf through the site again to buy more o-rings.
I used N90’s on my Crickets that had a stubborn leak in the AT or to maintain a higher fill pressure else where.
But usually N70’s are used for everything PCP related and some say it’s the only thing that a PCP requires and nothing more.
Harder O-ring can cause premature ware on certain parts that move like the piston in the reg.
~ Greg
**PING**
Anyone care to chime in about the N70’s v.s. N90’s? 😛
Get the heck out of here! Amazon? Really? I buy on Amazon all the time, and would have never thought to look there!
Thanks a million!
~ Greg
Viewing 9 replies - 1 through 9 (of 9 total)
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Hooters, sounds like Ole Ernest took care of you. When I got my Vulcan Ernest did a full tune on it and replaced the O-rings with US made ones. Several months after that he sent me O-rings for my Vulcan in a bag. At that time he didn’t have a O-ring kit like he was selling for the Cricket but he may have that kit now. What would we do without Ernest?