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DQ41F, DQ417F low-temperature flange ball valve
Product Name:
DQ41F, DQ417F low-temperature flange ball valve
Description:

低温法兰球阀 DQ41F、DQ417F

技术规范

设计依据 GB
设计标准 GB12237-89
结构长度 GB12221-89
连接法兰 GB/T 9113-2000 JB/T79-94
试验和检验 JB/T 9092-99

结构设计及加工制造的特点 

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。
   液化天然气阀门的材料非常重要,材质不合格,会造成壳体及密封面的外漏或内漏;零部件的综合机械性能、强度和钢度满足不了使用要求甚至断裂。导致液化天然气介质泄漏引起爆炸。因此,在开发、设计、研制液化天然气阀门的过程中,材质是首要关键的问题。阀体、阀盖采用:LCB(-46℃)、LC3(-101℃)、CF8(304)(-196℃).
我厂对所生产的低温阀门经特殊的低温处理,将粗加工的零件置于冷却介质中数小时(2-6小时),以释放应力,确保材料的低温性能,保证精加工尺寸,以防阀门在低温工况时,因温度变化造成变形而导致的泄漏。

型号、材料及主要参数

产品型号 DQ41F-10C-100 DQ41F-10P-100P
DQ47F-10C-100 DQ47F-10P-100P
阀体 LCB CF8
球体 304 304
阀杆 304 304
密封圈 PTFE PTFE
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


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