日本SMC先導式減壓閥特點簡介
用壓縮空氣的作用力代替調壓彈簧力以改變出口壓力的閥，稱為導式減壓閥。它調壓時操作輕便，流量特性，穩壓精度高，壓力特性也，適用于通徑較大的減壓閥。
導(dao)式(shi)減壓(ya)(ya)(ya)閥(fa)調壓(ya)(ya)(ya)用(yong)的壓(ya)(ya)(ya)縮空(kong)氣，般是由小(xiao)(xiao)型(xing)直(zhi)動(dong)式(shi)減壓(ya)(ya)(ya)閥(fa)供給的。若(ruo)將這(zhe)個小(xiao)(xiao)型(xing)直(zhi)動(dong)式(shi)減壓(ya)(ya)(ya)閥(fa)與(yu)主(zhu)閥(fa)合(he)成體，則稱為內部導(dao)式(shi)減壓(ya)(ya)(ya)閥(fa)。若(ruo)將它(ta)與(yu)主(zhu)閥(fa)分離，則稱為外部導(dao)式(shi)減壓(ya)(ya)(ya)閥(fa)，它(ta)可實現遠距離控制。

下圖(tu)是SMC IR系(xi)列導式減壓(ya)(ya)閥(fa)(fa)結構(gou)原(yuan)理圖(tu)。順(shun)時針旋轉設定手輪1，調(diao)壓(ya)(ya)彈簧3被(bei)壓(ya)(ya)縮，推動(dong)擋板7，關閉(bi)噴(pen)嘴(zui)6，輸入(ru)氣壓(ya)(ya)力(li)通過固定節(jie)流(liu)(liu)孔2流(liu)(liu)入(ru)膜片(pian)(pian)(pian)B的(de)上(shang)腔(qiang)，氣壓(ya)(ya)力(li)推動(dong)膜片(pian)(pian)(pian)C，使主閥(fa)(fa)芯4開(kai)啟，則(ze)有壓(ya)(ya)力(li)輸出(chu)。此輸出(chu)壓(ya)(ya)力(li)方面作(zuo)用在(zai)膜片(pian)(pian)(pian)C的(de)下腔(qiang)，與(yu)膜片(pian)(pian)(pian)B的(de)上(shang)腔(qiang)氣壓(ya)(ya)力(li)相平衡(heng)；另(ling)方面，通過OUT側通路，進(jin)入(ru)膜片(pian)(pian)(pian)A下腔(qiang)，與(yu)設定彈簧力(li)相平衡(heng)，以維持出(chu)口(kou)壓(ya)(ya)力(li)不變(bian)。當(dang)出(chu)口(kou)壓(ya)(ya)力(li)增大(da)，膜片(pian)(pian)(pian)A上(shang)移，噴(pen)嘴(zui)與(yu)擋板開(kai)啟，膜片(pian)(pian)(pian)B上(shang)腔(qiang)壓(ya)(ya)力(li)下降，則(ze)膜片(pian)(pian)(pian)B、C組件上(shang)移，常(chang)泄(xie)式排氣閥(fa)(fa)芯5瞬時開(kai)啟，出(chu)口(kou)壓(ya)(ya)力(li)下降，又維持出(chu)口(kou)壓(ya)(ya)力(li)不變(bian)。噴(pen)嘴(zui)擋板機構(gou)和常(chang)泄(xie)式排氣閥(fa)(fa)的(de)溢流(liu)(liu)作(zuo)用對壓(ya)(ya)力(li)調(diao)節(jie)是很敏感(gan)的(de)，故能(neng)實(shi)現精密穩壓(ya)(ya)。

日本SMC先導式減壓閥特點簡介
型號
AS2301F-01-04    AS3201FE-03-08SK    AS4211F-04-12S
AS2301F-01-04S    AS3201FE-03-10SK    AS4211F-04-12SK
AS2301F-01-04SK    AS3201FE-03-12SK    AS4211F-04-12SN
AS2301F-01-04SK-X264    AS3201FG-02-08S    AS4211F-04-13
AS2301F-01-04ST    AS3201FG-02-10S    AS4211F-04-13SK
AS2301F-01-06    AS3201FG-02-12S    AS4211FE-04-12SK
AS2301F-01-06S    AS3201FG-03-06    AS4211FG-04-10
AS2301F-01-06SD    AS3201FG-03-06S    AS4211FG-04-10S
AS2301F-01-06SK    AS3201FG-03-08    AS4211FG-04-12
AS2301F-01-06SK-X264    AS3201FG-03-08S    AS4211FG-04-12S
AS2301F-01-06SN    AS3201FG-03-10    AS4211FPG-04-10