A21 Spring Loaded Low Lift External Thread Type Safety Valve

Introduction:
1.In low lift valves, the disc only lifts a distance of 124th of the bore diameter. The discharge area is determined entirely by the position of the disc, and since the disc only lifts a small amount, the capacities tend to be much lower than those of full or high lift valves.
2. low lift safety valve valve opening height is between one twentieth to one fortieth times of the flow diameter.
A21F、A21H-C type are used for the equipment and pipeline of the air, ammonia, petroleum gas, etc. medium what the working temperature are less than 200℃.
A21W-P,R type are used for the equipment and pipeline of the quality with corrode gas and liquid medium what the working temperature are less than 200℃ 。Take for extrapressure protection devices.
KA21Y type are used for liquefied petroleum gas what the working temperature are less than 100℃.