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截止閥

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高壓截止閥的優缺點之處

發布時間:2016-12-12  編輯:taike 查看:

高壓截止閥
  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.
 
  截止閥軸和閥座密封面的垂直。根據這種活動形式的閥門,閥座通過變化口與閥門行程成比例。閥桿打開或關閉相對較短的行程,并且具有非常可靠的切割功能,并且閥座通過口和閥門行程的變化成比例,非常適合流量調節。閥桿打開或關閉相對較短的行程,并具有非常可靠的切割動作,使該閥適用于中等切割或調節和節流。
 
  該閥具有結構簡單,易于制造和維修的優點。閥門工作時間小,開閉時間短。閥門密封性好,密封面之間的摩擦力小,壽命長。
 
  一旦閥門打開,其閥座和閥盤密封面之間沒有接觸,密封面之間的機械磨損小,因為沒有必要從管道中拆下閥門,大多數閥座和閥門很容易修理或更換密封,其中閥門和管道焊接成一個場合是合適的。當流動阻力時介質通過閥的流動方向發生變化,因此閥門比其他閥門高得多。
 
  閥門缺點:1,截止閥流體阻力大,打開和關閉所需的力越大。閥門不適用顆粒,粘度大,易焦化。中等閥門調節性能差。閥位的類型由閥桿螺紋分為外螺紋型閥,螺紋閥根據介質流量,有直通閥,直流型閥和角型閥。
 
  常用的截止閥如下:1)角型閥;在角型閥中,流體僅改變一個方向,使得通過閥的壓降小于截止閥2的常規結構)DC型閥;在直流型或Y型截止閥中,閥的流動通道和主通道成斜線,因此損傷流動狀態小于常規截止閥,并且通過閥的壓力損失相應地)柱塞式閥:這種形式的截止閥是常規閥的變型。閥,閥和閥座通常基于柱塞的設計原理。波紋閥柱塞與閥桿連接,兩個彈性密封圈設置在柱塞上的密封圈上。兩個彈性環由一個環分隔,并通過閥蓋螺母施加在閥蓋上的負載密封在柱塞周圍。

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