H71系列对夹升降式止回阀型号,材料说明 配管法兰 公称压力 常规产品型号 JB/T 74 ~90、 GB/T 9112 ~9124、 HG 20592 ~20614 PN1.0MPa H71H-10C H71W-10P H71W-10P8 H71W-10P3 H71W-10R H71W-10R8 H71W-10R3 PN1.6MPa H71W-16C H71W-16P H71W-16P8 H71W-16P3 H71W-16R H71W-16R8 H71W-16R3 PN2.5MPa H71W-25 H71W-25P H71W-25P8 H71W-25P3 H71W-25R H71W-25R8 H71W-25R3 PN4.0MPa H71W-40 H71W-40P H71W-40P8 H71W-40P3 H71W-40R H71W-40R8 H71W-40R3 PN6.3