YAMAHA電(dian)磁(ci)閥是用(yong)電(dian)磁(ci)控制的(de)工業設備(bei)，是用(yong)來控制流體的(de)自動化基礎元件，屬于(yu)執(zhi)行器，不限(xian)于(yu)液壓、氣動。

一、電磁(ci)閥從原(yuan)理(li)上(shang)分(fen)為：

1.直動式電磁閥

原理：通電(dian)時，電(dian)磁(ci)線圈產生電(dian)磁(ci)力(li)把關(guan)閉(bi)件從(cong)閥座上提起，閥門打開；斷電(dian)時，電(dian)磁(ci)力(li)消失(shi)，彈簧把關(guan)閉(bi)件壓(ya)在閥座上，閥門關(guan)閉(bi)。

特(te)點：在真空、負壓、零(ling)壓時能正(zheng)常工作，但(dan)通徑一般不超過25mm。

2.分(fen)步直動式電磁(ci)閥

原(yuan)理(li)：它是一種直動(dong)(dong)和先(xian)導(dao)式(shi)相(xiang)結合的原(yuan)理(li)，當入口與出(chu)口沒有(you)壓(ya)(ya)差(cha)(cha)時，通電后，電磁力(li)(li)(li)直接把先(xian)導(dao)小閥(fa)(fa)和主閥(fa)(fa)關閉(bi)件依次向上(shang)(shang)提起，閥(fa)(fa)門打開。當入口與出(chu)口達到啟動(dong)(dong)壓(ya)(ya)差(cha)(cha)時，通電后，電磁力(li)(li)(li)先(xian)導(dao)小閥(fa)(fa)，主閥(fa)(fa)下(xia)(xia)腔(qiang)壓(ya)(ya)力(li)(li)(li)上(shang)(shang)升，上(shang)(shang)腔(qiang)壓(ya)(ya)力(li)(li)(li)下(xia)(xia)降，從而(er)利用壓(ya)(ya)差(cha)(cha)把主閥(fa)(fa)向上(shang)(shang)推開；斷電時，先(xian)導(dao)閥(fa)(fa)利用彈簧力(li)(li)(li)或介質(zhi)壓(ya)(ya)力(li)(li)(li)推動(dong)(dong)關閉(bi)件，向下(xia)(xia)移動(dong)(dong)，使閥(fa)(fa)門關閉(bi)。

特(te)點(dian)：在零(ling)壓(ya)差或(huo)真空(kong)、高壓(ya)時亦可動作，但(dan)功(gong)率(lv)較大，需(xu)水平安(an)裝。

3.先導式電磁閥

原理：通(tong)(tong)電(dian)時，電(dian)磁(ci)力(li)(li)(li)把(ba)先導孔(kong)打開，上(shang)(shang)(shang)腔室壓(ya)力(li)(li)(li)迅速(su)下(xia)降(jiang)，在(zai)關(guan)閉(bi)(bi)(bi)件(jian)周圍形(xing)成上(shang)(shang)(shang)低下(xia)高的壓(ya)差，流體壓(ya)力(li)(li)(li)推動(dong)關(guan)閉(bi)(bi)(bi)件(jian)向上(shang)(shang)(shang)移動(dong)，閥(fa)(fa)門打開；斷電(dian)時，彈簧力(li)(li)(li)把(ba)先導孔(kong)關(guan)閉(bi)(bi)(bi)，入口壓(ya)力(li)(li)(li)通(tong)(tong)過旁(pang)通(tong)(tong)孔(kong)迅速(su)腔室在(zai)關(guan)閥(fa)(fa)件(jian)周圍形(xing)成下(xia)低上(shang)(shang)(shang)高的壓(ya)差，流體壓(ya)力(li)(li)(li)推動(dong)關(guan)閉(bi)(bi)(bi)件(jian)向下(xia)移動(dong)，關(guan)閉(bi)(bi)(bi)閥(fa)(fa)門。

特(te)點：流體(ti)壓力(li)范圍上限較高，可任意安裝（需定制）但需滿足(zu)流體(ti)壓差條件。

二、電磁閥(fa)從(cong)閥(fa)結構(gou)和材料上的不同與原理(li)上的區別，分為六(liu)個分支小類：直動(dong)膜片(pian)(pian)結構(gou)、分步直動(dong)膜片(pian)(pian)結構(gou)、先(xian)導膜片(pian)(pian)結構(gou)、直動(dong)活(huo)塞結構(gou)、分步直動(dong)活(huo)塞結構(gou)、先(xian)導活(huo)塞結構(gou)。

三、電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)按照功能分(fen)類：水用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、蒸(zheng)汽電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、制冷電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、低(di)溫電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、燃氣(qi)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、消防電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、氨用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、氣(qi)體電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、液體電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、微型電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、脈沖電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、液壓電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa) 常開(kai)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、油用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、高壓電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)、防爆電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)等。

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