美标止回阀型号：ZF43YZF63YZ83Y美标止回阀通径：25mm——300mm美标阀压力:1.6MPa——42MPa美标阀技术标准：设计标准按GB/T19672API6D结构长度按GB/T19672API6D连接法兰按GB/T9113A***EB16.5试验与检验按JB/T9092AIP598美标阀主要零件材料：阀体A216-WCBA352-LCBA351-CF8A351-CF8M阀座A105+PTFEA352-LCB+PTFEA182-F304+PTFEA182-F316+PTFE闸板A105+ENPA352-LCB+ENPA240-304A240-316阀杆A276-420A182-F304A182-F304A182-F316S填料PTFE(Graphite)PTFE(Graphite)PTFE(Graphite)PTFE(Graphite))