不锈钢旋启式止回阀H44W采用内装摇臂旋启式结构，阀瓣绕转轴作旋转运动，阀瓣在流体压力作用下开启，流体从进口侧流向出口侧。当进口侧压力低于出口侧时，阀瓣在流体压差、本身重力等因素作用下自动关闭以防止流体倒流。不锈钢旋启式止回阀H44W特点：1.广泛用于给排水、消防、暖通、工业等系统。2.能有效地减小水锤压力，密封性能好，关闭无噪声。3.采用符合水力学的轮廓设计取得较佳的流线型水路内部附有导流体的设计能保证***小的压力损失。4.安装于水泵出水口处可在水流倒流前***快速关闭避免产生水锤、水击声和破坪性冲击以达到防止倒流和保护设备的目的。不锈钢旋启式止回阀H44W应用规范：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不锈钢旋启式止回阀H44W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不锈钢旋启式止回阀H44W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-Φ2524896