介紹FESTO比例方向控制閥特點
德國(guo)(guo)費(fei)斯托(tuo)(tuo)方向流(liu)量比例(li)閥(fa)(fa)里有(you)密閉(bi)(bi)的(de)(de)腔，在不(bu)同(tong)位(wei)置開(kai)(kai)有(you)通孔(kong)(kong)，每(mei)個(ge)孔(kong)(kong)都通向不(bu)同(tong)  電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)的(de)(de)油(you)管，腔中間(jian)(jian)是閥(fa)(fa)，兩(liang)面是兩(liang)塊電(dian)(dian)磁(ci)(ci)(ci)鐵(tie)，哪面的(de)(de)磁(ci)(ci)(ci)鐵(tie)線圈通電(dian)(dian)閥(fa)(fa)體就會被吸引到哪邊，通過(guo)控制(zhi)(zhi)閥(fa)(fa)體的(de)(de)移(yi)動(dong)(dong)(dong)來擋住或漏出不(bu)同(tong)的(de)(de)排(pai)油(you)的(de)(de)孔(kong)(kong)，而進(jin)油(you)孔(kong)(kong)是常(chang)開(kai)(kai)的(de)(de)，液壓(ya)(ya)油(you)就會進(jin)入不(bu)同(tong)的(de)(de)排(pai)油(you)管，然后通過(guo)油(you)的(de)(de)壓(ya)(ya)力來推動(dong)(dong)(dong)油(you)缸的(de)(de)活(huo)塞(sai)，活(huo)塞(sai)又帶(dai)動(dong)(dong)(dong)活(huo)塞(sai)桿(gan)，活(huo)塞(sai)桿(gan)帶(dai)動(dong)(dong)(dong)機械裝(zhuang)置動(dong)(dong)(dong)。這樣通過(guo)控制(zhi)(zhi)電(dian)(dian)磁(ci)(ci)(ci)鐵(tie)的(de)(de)電(dian)(dian)流(liu)通斷就控制(zhi)(zhi)了機械運(yun)動(dong)(dong)(dong)。德國(guo)(guo)費(fei)斯托(tuo)(tuo)方向流(liu)量比例(li)閥(fa)(fa)允許液體粘度般(ban)在20CST以下，大(da)于20CST應注(zhu)明。 　　工作(zuo)壓(ya)(ya)差，管路zui高(gao)壓(ya)(ya)差在小于0.04MPa時(shi)應選(xuan)用如ZS,2W,ZQDF,ZCM系(xi)列等直動(dong)(dong)(dong)式和(he)分(fen)步直動(dong)(dong)(dong)式；zui低工作(zuo)壓(ya)(ya)差大(da)于0.04MPa時(shi)可選(xuan)用導式（壓(ya)(ya)差式）電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)；zui高(gao)工作(zuo)壓(ya)(ya)差應小于電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)的(de)(de)zui大(da)標定壓(ya)(ya)力；般(ban)電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)都是單向工作(zuo)，因(yin)此要(yao)注(zhu)意是否有(you)反壓(ya)(ya)差，如有(you)安裝(zhuang)止回閥(fa)(fa)。 　　流(liu)體清潔度不(bu)高(gao)時(shi)應在電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)前安裝(zhuang)過(guo)濾器，般(ban)電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)對介質要(yao)求(qiu)清潔度要(yao)好。 　　注(zhu)意流(liu)量孔(kong)(kong)徑和(he)接管口徑；電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)般(ban)只有(you)開(kai)(kai)關兩(liang)位(wei)控制(zhi)(zhi)；條件允許請安裝(zhuang)旁路管，便于維(wei)修(xiu)；有(you)水錘現(xian)象(xiang)時(shi)要(yao)定制(zhi)(zhi)電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)的(de)(de)開(kai)(kai)閉(bi)(bi)時(shi)間(jian)(jian)調節。 　　注(zhu)意環(huan)境(jing)溫度對電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)的(de)(de)影響 　　電(dian)(dian)源電(dian)(dian)流(liu)和(he)消耗(hao)功率應根據輸出容量選(xuan)取，電(dian)(dian)源電(dian)(dian)壓(ya)(ya)般(ban)允許±10%左右，必須注(zhu)意交流(liu)起動(dong)(dong)(dong)時(shi)VA值較高(gao)。 　　二(er)、可靠(kao)性  電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)電(dian)(dian)磁(ci)(ci)(ci)閥(fa)(fa)分(fen)為常(chang)閉(bi)(bi)和(he)常(chang)開(kai)(kai)二(er)種；般(ban)選(xuan)用常(chang)閉(bi)(bi)型，通電(dian)(dian)打開(kai)(kai)，斷電(dian)(dian)關閉(bi)(bi)；但在開(kai)(kai)啟時(shi)間(jian)(jian)很長關閉(bi)(bi)時(shi)很短時(shi)要(yao)選(xuan)用常(chang)開(kai)(kai)型了。

介紹FESTO比例方向控制閥特點
183973 電磁閥          MFH-5/2K-FR-NA
183974 電磁閥          MN1H-5/2K-FR-NA
183977 電磁閥          MFXMH-5/2K-FR-NA
183978 電磁閥          MGTBH-5/2K-FR-NA
183979 電磁閥          MGXDH-5/2K-FR-NA
183980 電磁閥          MGXIAH-5/2-K-FR-NA
184101 電磁閥          MGXDH-3/2-1.2-24DC
184103 電磁閥          MGXIAH-3/2-0.8-24DC
184105 電磁閥          MGTBH-3/2-1.2-24DC