Interesting Mag Venting Issue - Help Please?

[Bobovan]

Firstly i apologise if there is an existing thread on the topic, i couldn't find one after 20 mins searching.

Secondly i would like to make it clear that the mag IS NOT LEAKING from an o-ring or around a valve, so please don't tell me to soak my o-rings in silicone or ptfe anything.

I recently purchased a KJW KC-02 with 3 magazines [short type]. One of these is working perfectly, the other two have exactly the same issue. If they are only filled with about 5 shots worth of gas they work fine, but on a full fill, as soon as the gas bottle is removed all the gas vents through the fill valve until there is only about 5 shots worth of gas left.

Has anyone come across this problem before? Are there any quick fixes, or do i just need to buy new valves? I've taken all three mags apart, and they are all identical as far as i can tell, i haven't removed any of the fill valves for fear of breaking the good one.

Please help?

[FPSEngland]

Re: Interesting Mag Venting Issue - Help Please?

Sounds like the O-Rings in the valves have worn out.

EDIT - You said it wasn't the o-rings, but are you sure they aren't just worn to the point they won't hold gas in anymore?

[Genista]

Re: Interesting Mag Venting Issue - Help Please?

So what you're saying is the mags vent at full pressure but seal once the pressure has dropped?

So it really is either worn orings or worn/dirty valve seats.

If the mags have seen plenty of use, it might be simpler just to replace them.

[Bobovan]

Re: Interesting Mag Venting Issue - Help Please?

Sounds like the O-Rings in the valves have worn out.

EDIT - You said it wasn't the o-rings, but are you sure they aren't just worn to the point they won't hold gas in anymore?

So what you're saying is the mags vent at full pressure but seal once the pressure has dropped?

So it really is either worn orings or worn/dirty valve seats.

If the mags have seen plenty of use, it might be simpler just to replace them.

alright, well, i'm sorry if i've completely misunderstood the problem...i just can't see how an o-ring issue could cause the valve internals to fail...[i'm not saying you're wrong, you probably know a hell of a lot more than me, i just like to be able to understand problems] can either of you explain how a fill valve functions, and how this issue could be caused?

thanks for the help though

[seansamurai1]

Re: Interesting Mag Venting Issue - Help Please?

The orings on the actual valve body hold the gas, when pressure is added, those o rings get press harder against the valve seat, if they are dry, undersized, damaged or not suitable they will release pressure until the gas is at a pressure they can hold.

[FPSEngland]

Re: Interesting Mag Venting Issue - Help Please?

The orings on the actual valve body hold the gas, when pressure is added, those o rings get press harder against the valve seat, if they are dry, undersized, damaged or not suitable they will release pressure until the gas is at a pressure they can hold.

This.

[Genista]

Re: Interesting Mag Venting Issue - Help Please?

Indeed, what Sean said. Very fixable.

[dave38x]

Re: Interesting Mag Venting Issue - Help Please?

If you can take the valves apart you can get replacement o-rings easily enough