A38Y/A43H/A37H型安全阀除三通（材料WCB）以外，安全阀的其余零件的材料均和A47H、A48Y型弹簧式安全阀是相同的。

A38Y/A43H/A37HHsefety valve.except three-ways style(material WCB),the materials of other parts is same as A47H、A48Y type spring loaded.

A38Y/A43H/A37H型双联安全阀是在Y型接头上装设两个同样规格的A48Y或A47H型安全阀而构成，其公称通径列指Y型接头进口通径，其组合情况见下表：

A38Y/A43H/A37H type twin safery valve is composed of two A48Y or A47Y type safety valves with the same specitications.Which are fixed on a Y-shaped joint.The nominal diameter is the inlet diameter of the Y-shaped joint.Here is the table to show its combination.


弹簧式安全阀主要外形尺寸 Main External dimensions