A21H Spring loaded low lift external thread safety valve111
Use
A21H type is suitable for the working temperatureof 200℃or less medium such as air, ammonia,liquefied petroleum gas (LPG) of equipment andpiping. A21W type is suitable for the workingtemperature of 200℃ or less corrosive gas orliquid equipment and piping. A21F type is suitable
for the working temperature of 200℃ or lessliquefied petroleum gas, liquefied petroleum gas(LPG) and other equipment and piping, as theoverpressure protection device.

Main connection size
