Reximex Bottle Valve vs FX bottle Valve

I was looking for a Bottle valve for my Reximex Throne 2 and was on BestFittings in the UK. I found these two Bottle valves. I don't see any difference.

Reximex Valve

FX Valve
 
I was looking for a Bottle valve for my Reximex Throne 2 and was on BestFittings in the UK. I found these two Bottle valves. I don't see any difference.

Reximex Valve

FX Valve
You can use the valve on the throne with a buddy bottle.

Resized_20250228_144154_1741009380532.jpeg
 
You can use the valve on the throne with a buddy bottle.

View attachment 561155
Yes, i did my usual big bottle upgrade immediately after unboxing. Had ordered one when I bought the gun from Huma Air and then there was a 2 week delay in shipping the gun. So it was here when the gun finally arrived.

I was looking for a 2nd one and noticed the FX appears to be the same valve. But it looks like the FX is 300bar and the Reximex is 250bar. So probably not interchangeable.
 
Yes, i did my usual big bottle upgrade immediately after unboxing. Had ordered one when I bought the gun from Huma Air and then there was a 2 week delay in shipping the gun. So it was here when the gun finally arrived.

I was looking for a 2nd one and noticed the FX appears to be the same valve. But it looks like the FX is 300bar and the Reximex is 250bar. So probably not interchangeable.
Gotcha, when I was in the process of swapping bottles at palmy Jerry guns, we tried running a buddy valve and that, and for some reason, it didn't work. I can't remember if the inside valve park was too shallow or too deep. I would ask thammer if he has any spare valves, or check with https://spares.bagnallandkirkwood.co.uk/product-categories/
 
In playing around i tried hot swapping the bottle with the FX valve. Other than a small amount of air as the valve seated it went on without blowing the oring.

Sample of 1 says the FX will hotswap and a sample of 8 or so says the Reximex valve will not. I think the difference is the depth of the pin. The FX may be deeper and the oring almost seated when opening.

I'll try swapping again now that it is light and raccoons are in for the day.
 
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I figured it out. The Reximex valve has a short angled oring seat. The FX has a deeper squared seat. The FX holds the oring and the Reximex allows the oring to slide out.

No hot swapping the Reximex valve.
Hot swap the FX with just a small amount of air loss.

Now to figure out how to regulate the bottle so I can have 300 bar in the bottle and 250 bar in the gun.

The Reximex valve oring seat:
20250517_103244.jpg
 
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