PARKER電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)是用(yong)來控(kong)(kong)(kong)制(zhi)(zhi)(zhi)流(liu)體的(de)(de)(de)(de)方向(xiang)的(de)(de)(de)(de)自(zi)動化基礎(chu)元件，屬于(yu)(yu)(yu)執行器；通(tong)(tong)(tong)常用(yong)于(yu)(yu)(yu)機械(xie)(xie)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)和工業閥(fa)(fa)(fa)門上面，對(dui)介質方向(xiang)進行控(kong)(kong)(kong)制(zhi)(zhi)(zhi)，從而達到對(dui)閥(fa)(fa)(fa)門開(kai)關(guan)的(de)(de)(de)(de)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)。電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)里有密(mi)閉(bi)的(de)(de)(de)(de)腔(qiang)，在(zai)不同(tong)(tong)位置(zhi)開(kai)有通(tong)(tong)(tong)孔(kong)，每個孔(kong)都通(tong)(tong)(tong)向(xiang)不同(tong)(tong)的(de)(de)(de)(de)油(you)(you)管，腔(qiang)中(zhong)間是閥(fa)(fa)(fa)，兩(liang)面是兩(liang)塊電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)，哪面的(de)(de)(de)(de)磁(ci)(ci)(ci)(ci)鐵(tie)線(xian)圈(quan)通(tong)(tong)(tong)電(dian)(dian)(dian)(dian)閥(fa)(fa)(fa)體就會被(bei)吸(xi)引到哪邊(bian)，通(tong)(tong)(tong)過(guo)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)閥(fa)(fa)(fa)體的(de)(de)(de)(de)移(yi)動來檔住(zhu)或漏出不同(tong)(tong)的(de)(de)(de)(de)排(pai)油(you)(you)的(de)(de)(de)(de)孔(kong)，而進油(you)(you)孔(kong)是常開(kai)的(de)(de)(de)(de)，液(ye)壓(ya)油(you)(you)就會進入不同(tong)(tong)的(de)(de)(de)(de)排(pai)油(you)(you)管，然后通(tong)(tong)(tong)過(guo)油(you)(you)的(de)(de)(de)(de)壓(ya)力來推動油(you)(you)缸的(de)(de)(de)(de)活(huo)塞，活(huo)塞又帶動活(huo)塞桿(gan)，活(huo)塞桿(gan)帶動機械(xie)(xie)裝置(zhi)動。這樣通(tong)(tong)(tong)過(guo)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)鐵(tie)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)就控(kong)(kong)(kong)制(zhi)(zhi)(zhi)了(le)機械(xie)(xie)運動。唯有電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)是用(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)力作用(yong)于(yu)(yu)(yu)密(mi)封在(zai)電(dian)(dian)(dian)(dian)動調節閥(fa)(fa)(fa)隔磁(ci)(ci)(ci)(ci)套管內的(de)(de)(de)(de)鐵(tie)芯完(wan)成，不存在(zai)動密(mi)封，所(suo)以外漏易堵絕。電(dian)(dian)(dian)(dian)動閥(fa)(fa)(fa)力矩控(kong)(kong)(kong)制(zhi)(zhi)(zhi)不易，容易產生內漏，甚(shen)至(zhi)拉斷閥(fa)(fa)(fa)桿(gan)頭部；電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)的(de)(de)(de)(de)結構型式(shi)容易控(kong)(kong)(kong)制(zhi)(zhi)(zhi)內泄漏，直至(zhi)降為零。所(suo)以，電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)使用(yong)特別安(an)(an)全，尤其(qi)適用(yong)于(yu)(yu)(yu)腐(fu)蝕性、有毒(du)或高低溫的(de)(de)(de)(de)介質。電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)本(ben)身結構簡單，價格也低，比起調節閥(fa)(fa)(fa)等其(qi)它種類執行器易于(yu)(yu)(yu)安(an)(an)裝維護。

PARKER派克電磁(ci)閥選(xuan)型首先(xian)應該依次遵(zun)循安全性，可(ke)靠(kao)性，適用性，經濟性四(si)大原 則，其次是根據六個方面的現場(chang)工況（即(ji)管道參(can)數、流體參(can)數、壓力(li)參(can)數、電氣參(can)數、動作方式、特殊(shu)要求進行選(xuan)擇）

1、根據管道參(can)數選擇PARKER派克電(dian)磁閥的：通徑規格（即DN）、接口方式

1）按(an)照現場管(guan)道內徑(jing)尺寸(cun)或流量要求來確定通徑(jing)（DN）尺寸(cun)；

2）接口方式，一般(ban)>DN50要選(xuan)擇法蘭接口，≤DN50則可根據用戶需要自由選(xuan)擇。

2、根據流體參數選擇PARKER派克電磁閥的：材質、溫(wen)度(du)組

1）腐蝕性流體：宜選用耐(nai)腐蝕電(dian)磁(ci)閥和全不銹(xiu)鋼(gang)；食(shi)用超凈流體：宜選用食(shi)品級不銹(xiu)鋼(gang)材質電(dian)磁(ci)閥；

2）高(gao)溫(wen)流(liu)體：要選擇采用耐高(gao)溫(wen)的電(dian)工材(cai)料(liao)和密封(feng)材(cai)料(liao)制造的電(dian)磁(ci)閥，而(er)且要選擇活塞式結構類型(xing)的；

3）流體狀(zhuang)態(tai)：大(da)至有氣態(tai)，液態(tai)或混合(he)狀(zhuang)態(tai)，特別是口徑大(da)于DN25時一定要區(qu)分開來；

4）流體(ti)粘度(du)：通(tong)常在50cSt以(yi)下可任(ren)意選擇(ze)，若超過此值，則要選用高粘度(du)電(dian)磁閥。

3、根(gen)據壓力參(can)數選擇電磁閥的：原理和結構品(pin)種

1）公(gong)稱壓力：這個參(can)數與(yu)其它通用閥(fa)門的含義是(shi)一樣的，是(shi)根據(ju)管道公(gong)稱壓力來定；

2）工作(zuo)壓力(li)：如果工作(zuo)壓力(li)低則必須(xu)選(xuan)用直(zhi)(zhi)動(dong)(dong)或分步直(zhi)(zhi)動(dong)(dong)式(shi)原理；低工作(zuo)壓差在0.04Mpa以上時直(zhi)(zhi)動(dong)(dong)式(shi)、分步直(zhi)(zhi)動(dong)(dong)式(shi)、先導式(shi)均可選(xuan)用。

4、電(dian)氣選(xuan)擇：電(dian)壓規格應盡量優(you)先(xian)選(xuan)用(yong)AC220V、DC24較為(wei)方便(bian)。

5、根(gen)據持(chi)續工(gong)作時間長短(duan)來選擇：常閉、常開、或(huo)可持(chi)續通(tong)電(dian)

1）當PARKER派(pai)克電磁(ci)閥需要長時(shi)(shi)間開(kai)啟，并且持續的(de)時(shi)(shi)間多(duo)于關(guan)閉的(de)時(shi)(shi)間應選 用(yong)常(chang)開(kai)型；

2）要是開(kai)啟的時間(jian)短或開(kai)和(he)關(guan)的時間(jian)不多時，則選常閉型；

3）但是有些(xie)用于安全保護的工(gong)況，如爐(lu)、窯火焰監(jian)測(ce)，則不能選(xuan)常開的，應(ying)選(xuan)可長期通(tong)電型。

6、根據(ju)環境要求選擇輔助功能：防爆、止回(hui)、手動(dong)、防水(shui)霧、水(shui)淋(lin)、潛水(shui)。

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