yongda brass stop valve 1,The working air pressure:3.0mpa 2,Suitable medium:R12,R22 3,Suitable temperature:-50--+150 modelABCDFGHj4sb/4082534414711301825j4sb/4071324412611301819j4sb/4072324412611301825CAST IRON STOP VALVES.1,the working air pressure:3.0MPA,hydraulic pressure:6.5MPA2,Suitable medium:R12,R22,R502,R407c,R134a,R410a ect.Refrigerants and other refigerating oil.3,Suitable temperature:- ...