H44H旋启式止回阀旋启式止回阀概述止回阀的功能是用来防止管路中的介质倒流。止回阀属于自动阀类，启闭件靠流动介质的力量自行开启或关闭。止回阀只用于介质单向流动的管路上，阻止介质回流，以防发生事故。适用介质为：水、油品、蒸汽、酸性介质等。旋启式止回阀标准：设计与制造结构长度压力-温度等级连接法兰试验与检验GB12236GB12221GB9131JB/T74HG20604JB/T74-94GB9113HG20592-20635JB/T9092-1999GB13927旋启式止回阀压力试验：称压力PN(MPa)试验压力(MPa)适用温度(℃)适用介质强度试验密封试验WCBCr5Mo1Cr18Ni12Mo2Ti1Cr18Ni9Ti1.62.41.8≤425≤550≤220≤200水、油品、蒸汽、酸性介质2.53.82.84.06.04.46.49.67.110.015.011.0-16.024.017.625.037.527.5旋启式止回阀主要零件材料及性能：零件名称材料编号阀体WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti阀盖WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti阀瓣WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti摇杆WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti阀座251Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni12Mo2Ti销轴1Cr17Ni21Cr18Ni9Ti1Cr18Ni12Mo2Ti密封环、垫片包覆垫1Cr18Ni9Ti1Cr18Ni12Mo2Ti旋启式止回阀主要技术尺寸公称压力PN(MPa)公称直径DN(mm)主要外形尺寸及连接尺寸(mm)重量(kg)LDD1D2b-fz-dD3H1.625160115856516-24--1414013014321801351007816-24--1815014016402001451108516-24--18160150185023016012510016-24--18185160226529018014512018-34--18215177268031019516013520-38-1823518733100354021518015520-38-182552023912540024521018522-38-182852275715048028024021024--38-233302638020055033529526526-312-233852939525065040535532030-312-2545533017530075046041037530-412-2551538226035085052047043534--316-2554543036040095058052548536-416-30600480496500115070565060844--420-34730560588尼威止回阀相关产品:175H48Y/H空排止回阀H83H/Y卡箍角式止回阀H44X-10S塑料旋启式止回阀H41H/W美标止回阀H11H/H61H内螺纹锻钢止回阀H42X底阀H44F46旋启式衬氟止回阀H41F46升降式衬氟止回阀H12H/W不锈钢立式内螺纹止回阀H14W不锈钢内螺纹旋启式止回阀H40F46衬氟升降式止回阀H42H/W不锈钢立式止回阀H41H升降式止回阀H44H旋启式止回阀H72Y对夹式高压止回阀H41X全铜消声止回阀H76X软密封蝶型止回阀H76H对夹式蝶形止回阀H74H对夹圆型止回阀H74I型对夹式薄型止回阀H71H不锈钢对夹升降式止回阀H71H对夹式全铜止回阀HQ45X微阻球形止回阀HQ44X微阻球形止回阀HQ41X滚球式止回阀H44X（SFCV）橡胶瓣止回阀H41X消声止回阀HH44X微阻缓闭止回阀HH46X、HH48X、HH49X微阻缓闭止回阀H42X（DRVZ）静音式止回阀CVKR静音止回阀（大口径静音式止回阀）H77H对夹单瓣蝶型止回阀)