一、什么是電動球閥和氣動球閥

1、電動球閥，英文名稱(cheng)：motor-driven ball valve 或者 electric ball valve。電動(dong)球(qiu)(qiu)閥通(tong)(tong)常由電動(dong)執行(xing)機(ji)構(gou)和球(qiu)(qiu)閥連(lian)接起(qi)來，經(jing)過安裝調(diao)試后成為電動(dong)球(qiu)(qiu)閥。電動(dong)球(qiu)(qiu)閥使用電能作為動(dong)力來接通(tong)(tong)電動(dong)執行(xing)機(ji)構(gou)驅(qu)動(dong)球(qiu)(qiu)閥，實現球(qiu)(qiu)閥的開關(guan)(guan)、調(diao)節(jie)動(dong)作，從而達到對管(guan)道介質的開關(guan)(guan)或是調(diao)節(jie)目的。

2、氣動球閥是(shi)球(qiu)閥(fa)(fa)配(pei)上氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)執行器。由氣(qi)(qi)(qi)(qi)(qi)源(yuan)為動(dong)(dong)(dong)(dong)(dong)(dong)力來驅動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)開(kai)啟和(he)關(guan)(guan)閉，從而實現(xian)對介(jie)質的開(kai)關(guan)(guan)、調節動(dong)(dong)(dong)(dong)(dong)(dong)作，從而達到對管道介(jie)質的開(kai)關(guan)(guan)或是(shi)調節目的自動(dong)(dong)(dong)(dong)(dong)(dong)化(hua)裝置。氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)通常配(pei)置各種附件，比如電磁閥(fa)(fa)、氣(qi)(qi)(qi)(qi)(qi)源(yuan)處(chu)理三聯件、限位開(kai)關(guan)(guan)、定位器、控(kong)制(zhi)(zhi)箱等，以實現(xian)就(jiu)地控(kong)制(zhi)(zhi)和(he)遠(yuan)距離集中控(kong)制(zhi)(zhi)，在控(kong)制(zhi)(zhi)室里就(jiu)可以控(kong)制(zhi)(zhi)閥(fa)(fa)門(men)的開(kai)關(guan)(guan)，不需(xu)要跑到現(xian)場或者高空和(he)危險地帶來手動(dong)(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)，在很大程度(du)上節約了(le)人力資源(yuan)以及(ji)時間和(he)安全性(xing)。氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)具(ju)體分(fen)類(lei)有(you)：不銹鋼氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)，塑料氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)，衛生級氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)，碳鋼氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)，二通氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)，三通氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)，四(si)通氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)。

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二、氣動球閥和電動球閥的區別

1、氣(qi)(qi)動(dong)(dong)(dong)閥(fa)(fa)(fa)動(dong)(dong)(dong)作(zuo)力(li)距比電動(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)大，氣(qi)(qi)動(dong)(dong)(dong)閥(fa)(fa)(fa)門(men)開關動(dong)(dong)(dong)作(zuo)速度(du)可以調(diao)整，結構(gou)簡單(dan)，易維(wei)護(hu)，動(dong)(dong)(dong)作(zuo)過(guo)程中因(yin)氣(qi)(qi)體本(ben)身的緩沖特性，不(bu)易因(yin)卡住(zhu)而損壞，但必須有氣(qi)(qi)源，且(qie)其控(kong)制(zhi)(zhi)系統也比電動(dong)(dong)(dong)閥(fa)(fa)(fa)門(men)復雜。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)(fa)(fa)門(men)響(xiang)應靈敏(min)，安全(quan)可靠，很多對控(kong)制(zhi)(zhi)要求高的廠專為氣(qi)(qi)動(dong)(dong)(dong)儀表控(kong)制(zhi)(zhi)元件設置壓縮空氣(qi)(qi)站(zhan)。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)(fa)(fa)門(men)執(zhi)行(xing)機構(gou)動(dong)(dong)(dong)力(li)源為氣(qi)(qi)源，氣(qi)(qi)源來源于(yu)空壓機，采用(yong)定(ding)位器將電控(kong)信號轉換成(cheng)氣(qi)(qi)動(dong)(dong)(dong)控(kong)制(zhi)(zhi)信號，驅動(dong)(dong)(dong)氣(qi)(qi)動(dong)(dong)(dong)執(zhi)行(xing)機構(gou)進行(xing)閥(fa)(fa)(fa)位調(diao)節。

2、電動閥門執(zhi)(zhi)行機(ji)(ji)構(gou)動力源為電(dian)源，如果線路板或電(dian)機(ji)(ji)出(chu)現(xian)故障容(rong)易出(chu)現(xian)火花，所(suo)以一般應用(yong)在環境要求不高和沒(mei)有危(wei)險的(de)場合(he)。就氣動執(zhi)(zhi)行機(ji)(ji)構(gou)和電(dian)動執(zhi)(zhi)行機(ji)(ji)構(gou)調節(jie)性能(neng)比(bi)較，氣動執(zhi)(zhi)行機(ji)(ji)構(gou)響應速度更(geng)快(kuai)，能(neng)更(geng)適合(he)應用(yong)在調節(jie)工況，所(suo)以生產調節(jie)閥的(de)廠家都同時生產氣動執(zhi)(zhi)行機(ji)(ji)構(gou)與之配套。

3、氣動球(qiu)閥(fa)比電動球(qiu)閥(fa)響應速(su)度快，一般氣動球(qiu)閥(fa)的開關時間(jian)為6秒(miao)左右，而電動球(qiu)閥(fa)的開關時間(jian)一般為15-20秒(miao)。

4、電動(dong)(dong)閥門(men)(men)和氣動(dong)(dong)閥門(men)(men)的(de)本質區別在于使用不同的(de)驅動(dong)(dong)裝置，也(ye)(ye)就(jiu)是(shi)執行(xing)機構，配合不同的(de)執行(xing)機構主要是(shi)工況(kuang)要求，如化工等要求防爆的(de)場合，使用最多的(de)是(shi)氣動(dong)(dong)閥門(men)(men)，因為安(an)全性要求高，而且價(jia)格便宜，配合智能定位器可以上總線，控制方式也(ye)(ye)簡單。

5、電動球(qiu)閥優點：對(dui)液體介(jie)質(zhi)和大管徑氣(qi)體效果好(hao)，不受(shou)氣(qi)候影響。不受(shou)空壓氣(qi)的壓力影響。缺點：成本高、在潮(chao)濕環境不好(hao)。

6、氣動球(qiu)閥優點：對氣體介(jie)質和小管徑液體效果好，成本(ben)低，維護(hu)方(fang)便。缺點：受空(kong)壓氣壓力波動的影響，在北方(fang)冬季易受空(kong)壓氣含水(shui)影響，造成傳(chuan)動部分(fen)凍(dong)結(jie)、不(bu)動作。

三、如何選用氣動球閥和電動球閥

電動球閥主要適宜用在沒有儀表氣源的場所，安裝使用方便，但安全性能較差，不宜使用在易燃易爆等對防爆性要求比較高的危險場所，使用中不及氣動閥穩定，維修量相對較大；氣動球閥響應速度快，其安全性能比較高，廣(guang)泛(fan)用(yong)在易(yi)燃(ran)易(yi)爆(bao)等防爆(bao)要求(qiu)高的場所。但安裝使(shi)用(yong)需要儀表氣源(yuan)，多只使(shi)用(yong)比較合算，可以建立氣源(yuan)基(ji)地。