電動(dong)(dong)閥(fa)(fa)(fa)簡(jian)單地說就是用電動(dong)(dong)執行器控制閥(fa)(fa)(fa)門(men)，從而實現(xian)閥(fa)(fa)(fa)門(men)的開(kai)和關。其可(ke)分為上下兩(liang)部(bu)分，上半(ban)部(bu)分為電動(dong)(dong)執行器，下半(ban)部(bu)分為閥(fa)(fa)(fa)門(men)。也(ye)可(ke)叫空調閥(fa)(fa)(fa)。

　　電動(dong)閥是(shi)自控(kong)(kong)(kong)閥門中的(de)產品，它不(bu)僅可以(yi)實現(xian)(xian)開關作(zuo)用(yong)，調節(jie)型電動(dong)閥還(huan)可以(yi)實現(xian)(xian)閥位(wei)調節(jie)功能。電動(dong)執行(xing)(xing)(xing)器(qi)的(de)行(xing)(xing)(xing)程(cheng)可分(fen)為：90°角行(xing)(xing)(xing)程(cheng)和(he)直(zhi)行(xing)(xing)(xing)程(cheng)兩種(zhong)，特(te)殊要求還(huan)可以(yi)滿足180°、270°、360°全行(xing)(xing)(xing)程(cheng)。由角行(xing)(xing)(xing)程(cheng)的(de)電動(dong)執行(xing)(xing)(xing)器(qi)配合角行(xing)(xing)(xing)程(cheng)的(de)閥使用(yong)，實現(xian)(xian)閥門90°以(yi)內旋控(kong)(kong)(kong)制(zhi)管(guan)道流(liu)體(ti)通斷;直(zhi)行(xing)(xing)(xing)程(cheng)的(de)電動(dong)執行(xing)(xing)(xing)器(qi)配合直(zhi)行(xing)(xing)(xing)程(cheng)的(de)閥使用(yong)，實現(xian)(xian)閥板上下動(dong)作(zuo)控(kong)(kong)(kong)制(zhi)管(guan)道流(liu)體(ti)通斷。

　　電(dian)動(dong)(dong)(dong)閥(fa)通常由電(dian)動(dong)(dong)(dong)執(zhi)行機(ji)構和閥(fa)門連接起來，經過安裝調(diao)試后成(cheng)為(wei)電(dian)動(dong)(dong)(dong)閥(fa)。電(dian)動(dong)(dong)(dong)閥(fa)使用電(dian)能作為(wei)動(dong)(dong)(dong)力來接通電(dian)動(dong)(dong)(dong)執(zhi)行機(ji)構驅(qu)動(dong)(dong)(dong)閥(fa)門，實現閥(fa)門的開(kai)關(guan)、調(diao)節(jie)動(dong)(dong)(dong)作。從(cong)而達到對(dui)管道介質的開(kai)關(guan)或是調(diao)節(jie)目的。

　　電動(dong)閥的(de)(de)驅動(dong)一(yi)般是用電機，開或關(guan)(guan)動(dong)作完成(cheng)需要(yao)(yao)一(yi)定(ding)的(de)(de)時間模(mo)擬量的(de)(de)，可以做調節。比(bi)較(jiao)耐電壓沖(chong)擊。電磁閥是快開和快關(guan)(guan)的(de)(de)，一(yi)般用在小(xiao)流(liu)量和小(xiao)壓力，要(yao)(yao)求(qiu)開關(guan)(guan)頻率(lv)大的(de)(de)地方;電動(dong)閥反之。電動(dong)閥閥的(de)(de)開度可以控(kong)制(zhi)，狀態有開、關(guan)(guan)、半(ban)開半(ban)關(guan)(guan)，可以控(kong)制(zhi)管道(dao)中介質的(de)(de)流(liu)量而電磁閥達(da)不(bu)到這個要(yao)(yao)求(qiu)。

　　三線(xian)(xian)制(zhi)(zhi)電動(dong)閥(fa)(fa)(fa)有F/R/N三條線(xian)(xian)，F代表正向動(dong)作(zuo)(或(huo)(huo)者open動(dong)作(zuo))控制(zhi)(zhi)線(xian)(xian)，R代表反向動(dong)作(zuo)(或(huo)(huo)者close動(dong)作(zuo))控制(zhi)(zhi)線(xian)(xian)，N代表地(di)線(xian)(xian)。電磁(ci)閥(fa)(fa)(fa)是(shi)電動(dong)閥(fa)(fa)(fa)的一個種類;是(shi)利用電磁(ci)線(xian)(xian)圈產生的磁(ci)場(chang)來拉動(dong)閥(fa)(fa)(fa)芯，從而改變閥(fa)(fa)(fa)體(ti)的通斷(duan)，線(xian)(xian)圈斷(duan)電，閥(fa)(fa)(fa)芯就依靠(kao)彈簧的壓力(li)退回。