Leakage Processing of Service Value and Shut-Off Value �EYou can apply it to R-12, R-22, R-134a, R-502 refrigerant. �EService port can be attached when applied to R134-a. �EThe body material is brass, and as a separated type its counter seat ant sealing is perfect and spindle, disc is of a structure that will not fall. �ECan attach high/low pressure switch. �E As a product applied to compressor of bus-air conditioner it is applied to the Japanese Nippon Denso (local manufacturer is Poongsung Ind., Co., Ltd.,) and the FK40 of German Bock (local manufacturer is Doowon Heavy Ind., Co., Ltd.). �ETwo methods of Gasket contracting and O-ring contracting methods for installing compressor.