... performance Product parameters:1, Charge valve is an one-way troubleshooting valve with valve inside.2, Charge valve is used for each part of ... freezing refrigeration and air control equipment.Characteristics:1, Adopt import valve inside, with reliable performance.2, ouble seel is confirmed no ... /16-20UNF301/2SAE16141/2-20UNF391/2ACME1/2-20UNF40 HongSen Charging Valve