对夹升降式止回阀对夹升降式止回阀主要技术参数：型号公称压力PN(MPa)试验压力PS(MPa)工作温度(℃)适用介质壳体密封SH71W-16P1.62.41.76≤200水、蒸体、油品等SH71H-25Q2.53.752.75≤235SH71W-25H≤300SH71W-25P≤200硝酸等腐蚀性介质SH71W-40H4.06.04.4≤300水、蒸体、油品等SH71W-40P≤200硝酸等腐蚀性介质规格型号阀体阀瓣弹簧SH71H-16Q、H71H-25QQT400-152550CrCASH71W-25H、H71W-40H2Cr131Cr131Cr18Ni9TiSH71W-16P、H71W-25PZG1Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni9Ti对夹升降式止回阀规格尺寸表:公称压力MPa公称通径DN尺寸（mm）LD1D2D3D4D5PN1.0MPaPN1.6MPa151652152431402019621930405025227224354758322883314656684031.59339556678504010848657890654612862809511080501427696110128100601629511513215012590192110125135-)