原水(shui)(shui)(shui)經過(guo)(guo)水(shui)(shui)(shui)管(guan)(guan)進(jin)入(ru)濾池(chi)通(tong)過(guo)(guo)濾層自上而(er)下(xia)(xia)的(de)過(guo)(guo)濾，后進(jin)入(ru)存水(shui)(shui)(shui)箱，充滿后通(tong)過(guo)(guo)出水(shui)(shui)(shui)管(guan)(guan)入(ru)清水(shui)(shui)(shui)池(chi)。濾層不斷留懸浮物(wu)，造成阻力增加，而(er)促使(shi)虹吸(xi)管(guan)(guan)內的(de)水(shui)(shui)(shui)位不斷升高，當水(shui)(shui)(shui)位達到虹吸(xi)輔助管(guan)(guan)管(guan)(guan)口(kou)時(shi)，水(shui)(shui)(shui)自該管(guan)(guan)落下(xia)(xia)，通(tong)過(guo)(guo)抽氣(qi)管(guan)(guan)借以帶走(zou)虹吸(xi)下(xia)(xia)降的(de)空氣(qi)，當真(zhen)空度達到一(yi)定值(zhi)時(shi)，便發生虹吸(xi)作用而(er)使(shi)水(shui)(shui)(shui)自下(xia)(xia)而(er)上通(tong)過(guo)(guo)濾層對濾料進(jin)行反(fan)沖(chong)洗。當沖(chong)洗水(shui)(shui)(shui)箱水(shui)(shui)(shui)面下(xia)(xia)降至虹吸(xi)破壞管(guan)(guan)時(shi)，空氣(qi)進(jin)入(ru)虹吸(xi)管(guan)(guan)，破壞虹吸(xi)作用，反(fan)沖(chong)洗結束(shu)，過(guo)(guo)濾重新開始。
無(wu)閥過(guo)濾器廣泛應用(yong)(yong)于地表(biao)水凈化，循環水旁流過(guo)濾，生產(chan)廢水除懸浮雜質，有(you)機污水經生化和二沉處(chu)理后(hou)的(de)過(guo)濾。鋼制(zhi)無(wu)閥過(guo)濾器主要利用(yong)(yong)虹吸原理進行(xing)定期反沖(chong)洗，過(guo)濾器進水出(chu)水、沖(chong)洗及排(pai)水均(jun)不(bu)用(yong)(yong)閥門，靠水力作用(yong)(yong)自動運行(xing)。