Results 1 to 6 of 6
08-19-2012, 08:55 PM #1
Add on one-way valve for R22 bottle..
Is there an add-on 1/4" one way valve that can be mounted on an older black handle 12 22 and 502 unprotected refrigerant cylinder to prevent contamination?
Even with care, I think check valve is necessary since if cylinder is cooler than trapped refrigerant in hose the oil can get back washed and contaminate the whole jug.
If it's brass flare female, would it seal right against steel male flare on cylinder?
08-24-2012, 02:17 AM #2
Never heard of anyone wanting that check valve in their tank. When they started that, they cut off my side income of selling empties for people to use for air tanks.
08-24-2012, 03:46 AM #3
Let's say for example you come across a 22 system wrongly charged with 410A. Depending on conditions, the pressure can be higher in system than cylinder.
Open the valve.. and entire 30 lb cylinder is now ruined, because 410A will back wash into it.
08-24-2012, 05:46 AM #4
Why would you even connect a tank until you were sure of the refrigerant in the system?
When in doubt, empty the system, and then charge to avoid mixing refrigerants.
08-25-2012, 04:40 AM #5
The reason for check valve was to prevent tank rupture if the high side is accidentally opened on the manifold. I suppose to prevent trafficking recovered 502 and 12 as virgin as well back when they were in high demand.
If that's not necessary neutral safety switch in cars is unnecessary as well. "just don't start in gear" is to cars as "don't open the high side valve " is to system charging.
Even if it doesn't result in enough backwash to rupture the tank, the entire tank is now polluted and unusable crap
08-25-2012, 09:01 AM #6