Thanks k jell for the information. I was just curious if you could be more spot on. Really 853 psi before co2 becomes a liquid and @ 72 degrees. The guy is very impressed.Typically when the bottle pressure drops below 853 psi. That is when you have run out of liquid in the bottle and now it is simply air pressure. Co2 becomes a liquid form at about 853 psi at 72 degrees. temperature will affect bottle pressure with co2. A cold bottle may only read 500 psi. A hot bottle could read 1100 psi. You cannot rely on bottle pressure to determine contents. When I fill my bottles. I write the empty weight on the bottle and then weigh it after. Generally it is hard to get all the air out to get a full fill with a simple transfer line.
With a 2.5 lb bottle I can usually get about ten cycles with the valve.
As far as the min pressure to operate the valve. I'd say around 100 psi. The surface area of the air piston is greater than the area of the water piston so you can get by with less air pressure than your suction piece pressure.
No shit.....I just about fell out the chair. Thought I was reading a post by SleeperCP or some shit. Damn, Kjell.Thanks k jell for the information. I was just curious if you could be more spot on. Really 853 psi before co2 becomes a liquid and @ 72 degrees. The guy is very impressed.