H42B氨用止回阀主要零件材料：零件名称阀体阀瓣密封圈H42B-25铸铁铸钢碳钢巴氏合金H42B-40性能规范：公称压力PN（MPa）试验压力PS（MPa）工作压力P（MPa）工作温度（℃）适用介质壳体密封2.52.753.752.5≤150氨、氨液主要尺寸：PNDNHDD1D2bfZ-φd2.5MPa4.032120135100781824-1840130145110851834-18501401601251002034-18651601801451202238-18801851951601352238-181002102301901602438-231252502702201882838-251503003002502183038-2520038036031027834312-25)