DQ41F超低温球阀DQ41F超低温球阀分为低温浮动球阀和低温固定球阀两类,对于温度高于-50℃,一般不采用长颈结构,对于温度低于-50℃的球阀,颈部长度T一般为250mm,或根据我公司的设计和计算确定.低温球阀主要用于输出液态低温介质如乙烯、液氧、液氢、液化天然气、液化石油产品等，不但易燃易爆，而且在升温时要气化，气化时，体积膨胀数百倍。二、DQ41F超低温球阀标准、参数、连接尺寸设计依据GB设计标准GB12237-89结构长度GB12221-89连接法兰GB/T9113-2000JB/T79-94试验和检验JB/T9092-99产品型号DQ41F-10C-100DQ41F-10P-100PDQ47F-10C-100DQ47F-10P-100P阀体LCBCF8球体304304阀杆304304密封圈PTFEPTFE填料PTFE+O形圈PTFE+O形圈适用介质水、油、蒸汽等酸等腐蚀性介质适用温度-50-29℃-196-29℃蜗轮低温球阀DQ后插入“3”表示，示例：DQ341F-16P气动低温球阀DQ后插入“6”表示，示例：DQ647F-16C电动低温球阀DQ后插入“9”表示，示例：DQ941F-25P产品型号公称通径PN1.6MPaWTTypeDNLDD1D2bZ-ΦdHW(kg)DQ41F-16C15130956545144-Φ141781403201401057555144-Φ141841604251501158565144-Φ141951805DQ41F-16P3216513510078164-Φ1828025094018014511085164-Φ182803001150203160125100164-Φ183003501565222180145120184-Φ183303501980241195160135208-Φ1836040027DQ9B41F-16C100305215180155208-Φ1840050038125356245210185228-Φ1843060058150394280240210248-Φ23500800812004573352952652612-Φ2368080095DQ9B41F-16P2505334053553203012-Φ257901300140产品型号公称通径PN2.5MPaWTTypeDNLDD1D2bZ-ΦdHW(kg)DQ41F-25P15140956545164-Φ141781403201521057555164-Φ141841604251651158565164-Φ1419518063217813510078184-Φ18280250104019014511085184-Φ182803001450216160125100204-Φ183003502065241180145120228-Φ183303502580283195160135228-Φ1836040030100305230190160248-Φ2340050040125381270220188288-Φ2543060065150403300250218308-Φ25500800852005023603102783412-Φ256808001002505684253703323612-Φ307901300165)