国标截止阀

丝扣截止阀的阀瓣一旦处于开启状况,它的阀座和阀瓣密封面之间就不再的接触,并具有非常可靠的切断动作,合得这种阀门非常适合作为介质的切断或调节及节流使用。
 

【特点】
(1)结构比闸阀简单,制造与维修都较方便。
(2)密封面不易磨损及擦伤,密封性好,启闭时阀瓣与阀体密封面之间无相对滑动,因而磨损与擦伤均不严重,密封性能好,使用寿命长。
(3)启闭时,阀瓣行程小,因而截止阀高度比闸阀小,但结构长度比闸阀长。
(4)启闭力矩大、启闭较费力,启闭时间校长。
(5)流体阻力大,因阀体内介质通道较曲折,流体阻力大,动力消耗大。
(6)介质流动方向 公称压力PN≤16MPa时,一般采用顺流,介质从阀瓣下方向上流;公称压力PN≥20MPa时,一般采用逆流,介质从阀瓣上方向下流.以增加密封件能。使用时,截止阀介质只能单方向流动,不能改变流动方向。
(7)全开时阀瓣经常受冲蚀。

Products and services that meet fluid control requirements

Each process, each facility, and each environmental constraint has its own special requirements. Therefore, Dongyan offers a comprehensive range of products covering different performance levels, pressures, different functions and different materials.

Product Application Scope

These devices are suitable for accurately controlling media such as gases, liquids, steam, etc., and maintaining process parameters such as pressure, flow rate, temperature, and liquid level at given values. Especially suitable for work environments where the allowable pressure difference is small and the allowable leakage is also small, and the pressure difference is not significant.

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