Air leaking when bottles screwed in.

[Andyshoots]

How come there should only be one o-ring on the stem if there are 2 grooves?
Mine has one in the rear (thanks kev) but just curious? I'd like to understand more than I do 😖

[Ca_Varminter]

The First grove in Technical Terms... is a Interference groove...
It allow the high pressure air to enter and swirl.
The turbulence created slow down the air before it hit the O-ring!!
At least this is the thinking behind it...
BTW having 2 O-rings creates excessive friction slowing down the Valve!!!

Stuart

[angrybear]

The thing with the valves is that different people make them with slightly different design.
I have 1 the same as Ca_V's photo, another has the 2 O rings around the "head" but in 2 separate groves, another only has 1 O ring around the head,

Most have an O ring in the angle where the "Tail" & "head" meet, (extreme right in photo) BUT there was a thread either here or t'other forum that said according to Ben Taylor it serves no purpose, it was needed on the steel valve but not on the black plastic valve ? Mine have the O ring as the blocks seem to have a recess for it.

On the stem some only have 1 groove & O ring, most 2 grooves only 1 O ring at the hammer end, one seller on the bay shows 2 O rings fitted but if pressure got between them it would 'lock' the stem, so that's wrong (I've had issues with that particular seller's products & won't touch them ever again).

"The only stupid question is the one you didn't ask, that would have fixed an issue if you had"

[Andyshoots]

Cheers guys 👌🏼

[Ca_Varminter]

I have seen and also made a couple different designs of the Valve-body...
One or two large O-rings in front of the transfer port is the norm...
Having one on the other side of the port is not needed...
That is why there is an O-ring on the Tail of the Valve-body...

Here is one of my stainless steel valve-body with a Titanium Valve-stem


Stuart

[slurpysam]

Hi Guys,
Got my o ring kit, from eBay? dunno if that's a good idea or not, the kit is a one size fits all, so I wont need all the o rings, the one I'm having trouble with locating is the one for the back of the exhaust valve, the existing one is all sorts of shapes, so i cannot determine the thickness of it. This kit I've got calls the two that fit ID of the O ring (G) reg seal large and (H) larger internal fastflow/ pressure gauge seal, the G one being twice the diameter of the H one. I'm probably not explaining this very well, The kit comprises of O rings A to M, A being the bottle inner seal and the largest M being the valve stem seal and the smallest, the kit is a bagnallakirkwood kit?
Does anyone have any knowledge of this type of kit?

[slurpysam]

Hi Guys,
Got my o ring kit, from eBay? dunno if that's a good idea or not, the kit is a one size fits all, so I wont need all the o rings, the one I'm having trouble with locating is the one for the back of the exhaust valve, the existing one is all sorts of shapes, so i cannot determine the thickness of it. This kit I've got calls the two that fit ID of the O ring (G) reg seal large and (H) larger internal fastflow/ pressure gauge seal, the G one being twice the diameter of the H one. I'm probably not explaining this very well, The kit comprises of O rings A to M, A being the bottle inner seal and the largest M being the valve stem seal and the smallest, the kit is a bagnallakirkwood kit?
Does anyone have any knowledge of this type of kit?

Sussed it via the O ring guide its H for anyone who has this kit.

[Ca_Varminter]

This may help your figure it out...


The only problem area.... is the Reg core O-rings.. many different designs... by a few different guys...

Good Luck,
Stuart

[slurpysam]

This may help your figure it out...


The only problem area.... is the Reg core O-rings.. many different designs... by a few different guys...

Good Luck,
Stuart

Hi Stuart,
Do you happen to know the BS number for the buddy bottle O ring by any chance?

[Ca_Varminter]

Hi Stuart,
Do you happen to know the BS number for the buddy bottle O ring by any chance?

Look at the top left panel......BS111

Stuart

[slurpysam]

Finally got the o ring for the valve stem, warmed it up and the kin thing split whilst putting it on. GGGGRRRRR.
Will have to wait for another one now.
Anyone else used Seals r us kits?.

[angrybear]

Did you give it a tiny smear of silicone grease before trying to fit it ?
I've certainly never needed to warm a Rapid seal to fit it.

If buying a kit, I get Bagnell & Kirkwood (a1tackleshop on the bay) because they come with a shadow guide to which is which.

'Seals r us' are a general seal supplier, rather than an airgun/theoben supplier .

[slurpysam]

Got back from my holiday and the new seals had arrived, from a different source, they feel much better and went on like a dream. Now im not saying the seals are us, ones are no good, its that the stem seal one was rubbish, and looks and measures a slightly different size?
I will be putting her back together today and will let you know how it goes.

[KevG]

what you find with the stem orings they can differ on different stems.even on genuine theobens not to mention after market
KevG

[slurpysam]

what you find with the stem orings they can differ on different stems.even on genuine theobens not to mention after market
KevG

Ah I see, its all back together now, a little hot at the mo, but ill sort that out when i can get out shooting.