Castel Refrigeration Solenoid Valve Air Conditioner Cold Storage Refrigerant Stop Valve Type 1020/2 、Castel Castel solenoid valve 1068/4 split welded junction coil HF2 cold storage air conditioner、 Castel solenoid valve 1064/3 cold storage air conditioning refrigeration stop valve HF2 screw port Castel electromagnetic valve 1064/4 4490/A air conditioning/cold storage refrigeration control valve Castel solenoid valve 1028/3 Air conditioning refrigerant refrigeration equipment control valve liquid supply Castrel solenoid valve/air conditioning/welding junction/refrigeration in cold storage 1068/3 1068/4A 6