Tank Valve will not flow in the really cold weather.

[JohnOneShot]

I could Use a little help here. I have two of the newer tank valves that have the slow fill technology. When it is really cold outside, (Below Zero) they will barely flow any air at all. My old one works just fine in the cold
​I finally got frustrated enough and just built another one of my super light tank valves, (which work better anyway,) But I am just really curious as to why the commercially available tank valves with slow fill get constipated in the cold weather.

 

[Trailryder42]

High pressure air escaping thru an orifice is quite cold. If it has any moisture in it, coupled with the fact that the outside air temp is cold, that moisture is going to freeze/ice up.