A43H型双联安全阀是一个Y型接头上设两个同样规格的A47H型安全阀而构成,其公称通径系指Y型接头进口通径,其组合情况如下:
A43H type twin safety valve is composed of two A47H type saftety valves with the same specification 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 the combination