H44F4、H44FEP、H44F46、H44PFA、H44PO、H44F3、H44F2衬里止回阀阀体材质A216WCBA351CF8A351CF3A351CF8MA351CF3MWCB304304L316316L技术性能规范设计标准HG/T3704、GB/T12235API6D结构长度HG/T3704、GB/T12221A***EB16.10法兰标准HG/T20592、GB/T9119A***EB16.5、JISB2220检验与试验HG/T13927、GB/T9092API598公称压力≤1.6MPa150LB衬里材料升降式立式旋启式H41F4H42F4H44F4H41FEPH42FEPH44FEPH41F46H42F46H44F46H41PFAH42PFAH44PFAH41POH42POH44POH41F3H42F3H44F3H41F2H42F2H44F2)