air condition check valve(Check valves, brass check valve) is suitable to refrigerants conditioner of R22, ... R407C, R410A ETC. Air Condition check valve(Check valves, brass check valve) Check valves (air condition check valve, brass check valve)check ... , R410A ETC.Parallel connection with capillary among the system and control the front-reverse flux of refrigerants, can applied among refrigeration ...