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截止阀

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高压截止阀的优缺点之处

发布时间:2016-12-12  编辑:taike 查看:

高压截止阀
  Stop valve axis and the valve seat sealing surface of the vertical.According to this mobile form of valve,valve seat through the mouth of change is proportional to the valve stroke.The valve stem to open or close the relatively short trip,and have very reliable cutting function,and the changes in the valve seat through the mouth and the valve stroke is proportional,is very suitable for flow regulation.The valve stem to open or close the relatively short trip,and have very reliable cutting action,makes this valve is suitable for medium cut or regulation and throttle.
 
  The valve has the advantages of simple structure,easy to manufacture and maintenance,.2.valve working schedule is small,open and close time is short.3.valve sealing is good,the friction force between the sealing surface is small,the life is long.
 
  Once the valve is turned on,there is no contact with its seat and disc sealing surface between the sealing surface mechanical wear small,because there is no need to remove the valve from the pipeline to most of the valve seat and valve easily repaired or replaced seals,which the valves and pipes welded into one of the occasion is appropriate.A change in the flow direction of medium through the valve when the flow resistance,so the valve is much higher than others.
 
  Valve disadvantages:1 cut-off valve fluid resistance,force required to open and close the larger.2.valve does not apply with particles,viscosity,easy to coke.3.medium valve regulation performance is poor.The type of valve position by the valve stem threads divided into external thread type valve,the threaded valve according to the flow of media,there are straight through valve,DC type valve and angle type valve.
 
  The cut-off valve commonly used are the following:1)angle type valve;in the angle type valve,the fluid change only one direction,so that the pressure drop through the valve smaller than the cut-off valve.2 of the conventional structure)DC type valve;in the DC type or Y type globe valve,valve the flow channel and main channel into a slash,so the damage flow state is smaller than the conventional cut-off valve,and.3 pressure losses through the valve correspondingly)plunger type valve:this form of cut-off valve is a variant of conventional valve.The valve,the valve and the valve seat is usually based on the design principle of the plunger.Polish valve plunger connected with the stem,two elastic seal is set in the plunger on the sealing ring.Two elastic rings separated by a ring,and through the valve cover nut load exerted on the valve cover to seal around the plunger Circle press firmly.
 
  截止阀轴和阀座密封面的垂直。根据这种活动形式的阀门,阀座通过变化口与阀门行程成比例。阀杆打开或关闭相对较短的行程,并且具有非常可靠的切割功能,并且阀座通过口和阀门行程的变化成比例,非常适合流量调节。阀杆打开或关闭相对较短的行程,并具有非常可靠的切割动作,使该阀适用于中等切割或调节和节流。
 
  该阀具有结构简单,易于制造和维修的优点。阀门工作时间小,开闭时间短。阀门密封性好,密封面之间的摩擦力小,寿命长。
 
  一旦阀门打开,其阀座和阀盘密封面之间没有接触,密封面之间的机械磨损小,因为没有必要从管道中拆下阀门,大多数阀座和阀门很容易修理或更换密封,其中阀门和管道焊接成一个场合是合适的。当流动阻力时介质通过阀的流动方向发生变化,因此阀门比其他阀门高得多。
 
  阀门缺点:1,截止阀流体阻力大,打开和关闭所需的力越大。阀门不适用颗粒,粘度大,易焦化。中等阀门调节性能差。阀位的类型由阀杆螺纹分为外螺纹型阀,螺纹阀根据介质流量,有直通阀,直流型阀和角型阀。
 
  常用的截止阀如下:1)角型阀;在角型阀中,流体仅改变一个方向,使得通过阀的压降小于截止阀2的常规结构)DC型阀;在直流型或Y型截止阀中,阀的流动通道和主通道成斜线,因此损伤流动状态小于常规截止阀,并且通过阀的压力损失相应地)柱塞式阀:这种形式的截止阀是常规阀的变型。阀,阀和阀座通常基于柱塞的设计原理。波纹阀柱塞与阀杆连接,两个弹性密封圈设置在柱塞上的密封圈上。两个弹性环由一个环分隔,并通过阀盖螺母施加在阀盖上的负载密封在柱塞周围。

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