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对夹式软密封蝶阀

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.

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Classification:

Ductile iron valve series

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Description


A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆产品概述

软密封蝶阀通常用于温度≤120℃,公称压力≤1.6MPa的食品、医药、化工、石油、电力、轻纺、造纸等给排水、气体管道上作调节流量和截断流体的作用。其主要特点为:
1、设计新颖、合理, 结构紧凑, 重量轻, 启闭迅速。
2、操作力矩小,操作方便, 省力灵巧。
3、可以任何位置安装,维修方便。
4、密封件可以更换,密封性能可靠,能够达到双向密封零泄漏。
5、密封材料具有耐老化、耐腐蚀、使用寿命长等特点。

◆应用标准

设计标准: GB/T12238
结构长度: GB/T12221
法兰连接尺寸: GB/T 17241.6、ASME B16.1、ASME B16.2
压力试验: GB/T 13927

◆主要技术规范

公称通径 DN(mm) 50~2000
公称压力 PN(MPa) 0.6 1.0 1.6
试验压力 壳体强度试验 0.9 1.5 2.4
密封试验 0.66 1.1 1.76
气密封试验 0.6 0.6 0.6
适用介质 空气、水、污水、蒸汽、煤气、油品等
驱动形式 手柄、蜗轮、电动、气动

 

◆主要零部件材料

零件名称 零件材料
阀体 球墨铸铁
蝶板 球墨铸铁、铸钢、不锈钢及特殊材料
密封圈 NBR、EPDM、VITON、PTFE
阀杆 20Cr13、不锈钢
填料 O型圈、柔性石墨

 

◆主要外形连接尺寸

材料品种 氯丁橡胶 丁腈橡胶 乙丙橡胶 聚四氟乙烯 硅橡胶 氟橡胶
代号 X或J XA或A XB或JB XC、JC或F XD或JD XE或JE
耐最高温度 82℃ 93℃ 150℃ 232℃ 250℃ 300℃
耐最低温度 -40℃ -40℃ -40℃ -268℃ -70℃ -23℃
适用工作温度 ≤65℃ ≤80℃ ≤120℃ ≤200℃ ≤200℃ ≤250℃

 

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