美國派克比例閥應用特點
美國派克(ke)比例(li)閥應用(yong)特點
它是(shi)一種直(zhi)(zhi)動(dong)和(he)先(xian)導(dao)式相(xiang)結(jie)合的(de)原理(li),當(dang)入口與(yu)出口沒有壓(ya)(ya)差時,通(tong)(tong)電(dian)后,電(dian)磁(ci)力(li)直(zhi)(zhi)接把(ba)先(xian)導(dao)小閥和(he)主閥關閉件依次向上(shang)(shang)(shang)提起,閥門(men)打開。當(dang)入口與(yu)出口達到(dao)啟動(dong)壓(ya)(ya)差時,通(tong)(tong)電(dian)后,電(dian)磁(ci)力(li)先(xian)導(dao)小閥,主閥下腔壓(ya)(ya)力(li)上(shang)(shang)(shang)升,上(shang)(shang)(shang)腔壓(ya)(ya)力(li)下降,從而利(li)用(yong)壓(ya)(ya)差把(ba)主閥向上(shang)(shang)(shang)推開;斷電(dian)時,先(xian)導(dao)閥利(li)用(yong)彈(dan)簧力(li)或介質壓(ya)(ya)力(li)推動(dong)關閉件,向下移動(dong),使閥門(men)關閉。
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