Quote Originally Posted by angrybear View Post
While factually accurate, none of the components between the cylinder outlet & the rifle should ever experience anymore pressure than the rifle max fill because that's when the cyl valve gets shut.
That's why the DIN airgun charging kits have a 225bar swp rather than 300bar

A point that anyone thinking of buying a rifle that fills above 225bar needs to note.
DIN is not limited to 200 bar. You can buy 300 bar DIN kit. With the right kit the 300 bar DIN will fit a 200 bar bottle.

There's a difference between should ever and can ever ... In other words if you didn't shut off the valve when you should have, at 200 bar, then the whole system can get to 300 bar, or certainly over 200 bar. The 300 bar dive cylinder won't shut off when the gun cylinder gets above 200 bar automatically, you have to do that bit yourself. The gun cylinder won't shut off automatically either. With some cylinders varying enormously in how fast they can deliver that pressure there's always that chance it won't be closed when it should have been, which is when 5 threads might not be enough.

Max rifle fill pressure on a Walther LG300 steel cylinder is 300 bar, so it's entirely possible to exceed 200 bar with a 200 bar adapter and still be in spec of both cylinders... except Walther supply a 300 bar DIN adapter with 7 threads.



I suspect the tolerances on the thread spec is well over what you need for 200, but then I also suspect they're there for a purpose, ie when you have more than 300 bar for some reason (like a hot day on a fresh 300 bar fill that was done at much colder temp).