一、H44旋启式止回阀主要用途H44旋启式止回阀选用于公称压力PN1.6～6.4MPa,工作温度-29～550℃的石油、化工、火力电站等各种工况的管路上。适用介质为：水、油品、蒸汽等。二、H44旋启式止回阀结构与特点1、选材考究，符合国内、外相关标准，材料的全面质量高。2、密封副配对先进合理，阀瓣、阀座密封面采用铁基合金或司太立（Stellite）钴基硬质合金堆焊面成，耐磨、耐高温、耐腐蚀、抗擦伤性能好，使用寿命长。3、产品按国家标准GB/T12235设计制造。4、可采用各种配管法兰标准及法兰密封型式，满足各种工程需要及用户要求。5、阀体材料品种齐全，垫片可根据实际工况或用户要求合理选配，能适用于各种压力、温度及介质工况。可按用户要求设计制造不同结构形式和连接形式的止回阀，为各种设备配套使用。三、H44旋启式止回阀应用范围设计与制造GB/T12235连接端尺寸结构长度GB/T12221法兰尺寸JB/T79检验与试验JB/T9092材料碳钢GB/T12229不锈钢GB/T12230合金钢Q/ZB66标志GB/T12220供货JB/T7928四、H44旋启式止回阀主要零件材料及主要用途阀体阀盖阀瓣阀座适用介质>适用温度(≤℃)WCBWCB+D507MoWCB+D577水、油品、蒸汽425ZG1Cr18Ni9Ti0Cr18Ni9+Stellite120Cr18Ni9+Stellite6销酸类200ZG1Cr18Ni2Mo2TiCF8M+Stellite12ZG1Cr18Ni2Mo2Ti磷酸、醋酸类、混酸200ZG00Cr17Ni14Mo2CF3M+Stellite12CF3M+Stellite6尿素、甲铵液、磷酸200ZG1Cr5MoZG1Cr5Mo+Stellite12ZG1Cr5Mo+Stellite6水、油品、蒸汽550五、H44旋启式止回阀主要外形尺寸和连接尺寸（mm）公称通径DNLDD1D2bZ-ΦdHWT(Kg)H44H-16CH44W-16CH44W-16PH44W-16RH44W-16I50230160125100164-Φ181352165290180145120184-Φ181422880310195160135208-Φ1816538100350215180155208-Φ1818058125400245210185228-Φ1821092150480280240210248-Φ232331302005003352952652612-Φ233042102505504053553203012-Φ253482943006504604103753012-Φ253903673507505204704353416-Φ254304104008505805254853616-Φ304684614509506405855454020-Φ3052357050010257056506084420-Φ34525850H44H-25H44W-25H44W-25PH44W-25RH44W-25I50230160125100204-Φ181602265290180145120228-Φ181752980310195160135228-Φ1818538100350230190160248-Φ2322061125400270220188288-Φ2524896150480300250218308-Φ252761322005503603102783412-Φ253502132506504253703323612-Φ304102973007504854303904016-Φ304303723508505504904484416-Φ345184154009506105505054816-Φ3456048045010256606005555020-Φ3458261050011507306606105220-Φ41618920公称通径DNLDD1D2D6bff2Z-ΦdHWT(Kg)H44H-40H44W-40H44W-40PH44W-40RH44W-40I凹凸法兰502301601251008820344-Φ18169226529018014512011022348-Φ18173208031019516013512122348-Φ18185381003502301901601502434.58-Φ23220611254002702201881762834.58-Φ25248961504803002502182043034.58-Φ252701322005503753202822603834.512-Φ303422132506504453853453134234.512-Φ344012973007505104504083644644.516-Φ34423372350850570510465422524516-Φ34455415400950655585535474584516-Φ41510480H44H-64H44W-64H44W-64PH44W-64RH44W-64I凹凸法兰503001751351058826344-Φ23177276534020016013011028348-Φ23197378038021017014012130348-Φ23212571004302502001681503234.58-Φ25248891255002952402021763634.58-Φ302961351505503402802402043834.58-Φ343301842006504053453002604434.512-Φ343852662507754704003523134834.512-Φ414453963009005304604123645444.516-Φ414746433501025595525475422604516-Φ415148154001150670585525474664516-Φ486161234)