截止閥的選型方法-浙江博科閥門科技有限公司_hot电竞

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    您的位置:博科氣動閥門 >> 新聞中心 >> 氣動執行器知識 >> 截止閥的選型方法 新聞中心

    截止閥的選型方法

    [來源:原創] [作者:admin] [日期:15-09-22] [點擊:]

    截止閥的閥杆軸線與閥座密封面垂直。閥杆開啟或關閉行程相對較短,并具有非常可靠的切斷動作,使得這種閥門非常适合作為介質的切斷或調節及節流使用。

    截止閥的閥瓣一旦處于開啟狀況,它的閥座和閥瓣密封面之間就不再的接觸,并具有非常可靠的切斷動作,合得這種閥門非常适合作為介質的切斷或調節及節流使用。

    截止閥一旦處于開啟狀态,它的閥座和閥瓣密封面之間就不再有接觸,因而它的密封面機械磨損較小,由于大部分截止閥的閥座和閥瓣比較容易修理或更換密封元件時無需把整個閥門從管線上拆下來,這對于閥門和管線焊接成一體的場合是很适用的。介質通過此類閥門時的流動方向發生了變化,因此截止閥的流動阻力較高于其它閥門。

    常用的截止閥有以下幾種:
    1)角式截止閥;在角式截止閥中,流體隻需改變一次方向,以緻于通過此閥門的壓力降比常規結構的截止閥小。
    2)直流式截止閥;在直流式或Y形截止閥中,閥體的流道與主流道成一斜線,這樣流動狀态的破壞程度比常規截止閥要小,因而通過閥門的壓力損失也相應的小了。
    3)柱塞式截止閥:這種形式的截止閥是常規截止閥的變型。在該閥門中,閥瓣和閥座通常是基于柱塞原理設計的。閥瓣磨光成柱塞與閥杆相連接,密封是由套在柱塞上的兩個彈性密封圈實現的。兩個彈性密封圈用一個套環隔開,并通過由閥蓋螺母施加在閥蓋上的載荷把柱塞周圍的密封圈壓牢。彈性密封圈能夠更換,可以采用各種各樣的材料制成,該閥門主要用于“開”或者“關”,但是備有特制形式的柱塞或特殊的套環,也可以用于調節流量。

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