... specified couplers. Working refrigerant:- R-22, R-134A, R-410 air conditioner valveThese are tested on 600 PSI pressure with specified couplers ... refrigerant:- R-22, R-134A, R-410A and R-407C.Air tightness pressure 3.0 MPa.Working temperature -30~+120ºCLeakage ... also be designed and produced according to our customer specifications. air conditioner valve