Polyurethane o rings?

[muzzie]

Hi
I'm having trouble finding 19x2mm polyurethane o rings for my Aeron Brno B96.... Any ideas please...the normal ones seem to blow, I'm not the only one apparently , must be a fault?

Thanks

[ChrisC]

Hi
I'm having trouble finding 19x2mm polyurethane o rings for my Aeron Brno B96.... Any ideas please...the normal ones seem to blow, I'm not the only one apparently , must be a fault?

Thanks

After a quick search ...these mention poly
http://www.oringslimited.co.uk/products/o-rings/

I use a company cally Polymax so maybe worth a try?

Does it have to be Poly?.......maybe Nitrile or Viton might be better.

Let me know mate as i've just checked and can get some Nitrile shore 70 19x2, EPDM or EPDM 70 ShA Peroxide Cured FDA (is the 19 the ID or the OD?)

[muzzie]

After a quick search ...these mention poly
http://www.oringslimited.co.uk/products/o-rings/

I use a company cally Polymax so maybe worth a try?

Does it have to be Poly?.......maybe Nitrile or Viton might be better.

Let me know mate as i've just checked and can get some Nitrile shore 70 19x2, EPDM or EPDM 70 ShA Peroxide Cured FDA (is the 19 the ID or the OD?)

Cheers Chris
19x15 outside/inside, poly as some one told me they are best way to go??? I bow to your superior knowledge ,what do you think.
The problem is the o ring that seals the co2 bulb in the grip, they supply 2piercers, I suppose to let the first to comeback to "room temp"
Also ,when storing a PCP you keep it filled, how are you supposed to store a co2 pistol, full or empty?
Cheers

[ChrisC]

Cheers Chris
19x15 outside/inside, poly as some one told me they are best way to go??? I bow to your superior knowledge ,what do you think.
The problem is the o ring that seals the co2 bulb in the grip, they supply 2piercers, I suppose to let the first to comeback to "room temp"
Also ,when storing a PCP you keep it filled, how are you supposed to store a co2 pistol, full or empty?
Cheers

I can get you some mate and pop in the post. If they don't work then no probs but if they do i can always get you some more.

I would think storing a Co2 pistol should be done empty but that means you have to shoot the bulb empty after each use.

[deejayuu]

As ChrisC says. Manual for Umarex Beretta FS 92 says store empty to relieve pressure on seals etc.
I just spill mine if part full and not shooting. Hope that helps.

[muzzie]

I just spill mine if part full and not shooting. Hope that helps.

Spill ...do you mean just release the gas...is this a Tech word?

[Benelli B76]

As ChrisC says. Manual for Umarex Beretta FS 92 says store empty to relieve pressure on seals etc.
I just spill mine if part full and not shooting. Hope that helps.

Any pistol that seals the CO2 capsule on the end should be emptied after a shooting session to relieve pressure on the seal from the capsule contact, as you say on pistols like the Beretta. Other pistols that seal the gas differently on the seals such as the Aeron, Drulov and others are better left pressurised with gas. Regarding comments on other posts regarding polyurethane, it is a far better material than Nitrile or Viton for sealing longevity.

Baz

[muzzie]

I can get you some mate and pop in the post. If they don't work then no probs but if they do i can always get you some more.

I would think storing a Co2 pistol should be done empty but that means you have to shoot the bulb empty after each use.

Thanks for that Chris , let me know what I owe you, which one would you recommend, I'll pm you my address later.
Cheers

[air-tech]

Just for everyone's benefit, there is a vendor on ebay goes by the name of Bohemia seal, and they supply awkward size o-rings even in very low qtys down to singles, have bought from them on a couple of occasions when stuck for a seal.

[ChrisC]

Thanks for that Chris , let me know what I owe you, which one would you recommend, I'll pm you my address later.
Cheers

Got your PM Neill, no charge mate.

[gwyn]

Hi
I'm having trouble finding 19x2mm polyurethane o rings for my Aeron Brno B96.... Any ideas please...the normal ones seem to blow, I'm not the only one apparently , must be a fault?

Thanks

Hi muzzie, i used to have a Tau 7 same problem then looking at a Crossman add decided to buy a tube of PELL GUN Lube,the red stuff NOT the silicone lube for spring guns,made to be used in all Crosmann co2 weapons,keeps the o-rings and internal seals soft and pliable.
Only apply ONE small drop to the end of the bulb (large end),this will work its way through the internal seals, and a smear around the o-ring cap,this solved my problems instantly.Also used on couple of QB78,s same problem and result.stops the o-ring from snagging as you insert and tighten the cap,they also dont swell and go brittle.
All of the members at my club use it on their CO2 pistols, rare to have to replace a damaged seal.
No one empty's their CO2out,in most cases pressure remains very good.
Only a few quid and lasts forever.
Don.

[Benelli B76]

It makes me wonder if people actually read the posts on these threads.

Baz

[Modski66]

Finally got in the shed with the Zastava, the seal fitted a treat! So while I was at it, I decided to try one more thing to up the power and get it to punch something close to round holes in the target. I have had a go at most of the variables in the mechanism, but I had a thought last week about the size of the main valve, it measured just over 4mm,so I enlarged it to 3/16,which is around 4.7mm.
Put it all back together and hey, success! It is down on the shot count, but that gave me a chance to examine the new seal after being soaked in liquid co2 for a few hours, no swelling evident and it went back into the bulb housing smoothly. Another success...

Just need to get it down to the range and set up the turning targets for some rapid fire fun!

[muzzie]

Hi muzzie, i used to have a Tau 7 same problem then looking at a Crossman add decided to buy a tube of PELL GUN Lube,the red stuff NOT the silicone lube for spring guns,made to be used in all Crosmann co2 weapons,keeps the o-rings and internal seals soft and pliable.
Only apply ONE small drop to the end of the bulb (large end),this will work its way through the internal seals, and a smear around the o-ring cap,this solved my problems instantly.Also used on couple of QB78,s same problem and result.stops the o-ring from snagging as you insert and tighten the cap,they also dont swell and go brittle.
All of the members at my club use it on their CO2 pistols, rare to have to replace a damaged seal.
No one empty's their CO2out,in most cases pressure remains very good.
Only a few quid and lasts forever.
Don.

Cheers for that , fitted the nit o rings, with a little Vaseline ?? As instructed, tightened up the the screw, then loosened off a quarter turn, works a treat now.
Cheers everyone for your advice, I knew I could count on you.

[Benelli B76]

muzzie, why don't you just fit a top quality polyurethane O ring like I supplied Modski66, I have dozens of them. PM me your address and I will post free of charge. The same O ring fits the Crosman 600, Drulov Condor, the QB78 valve body and end cap and lots of old vintage CO2 pistols.

Baz