五通(tong)止回閥具有止回閥功能、接壓力罐接口(kou)，壓力表接口(kou)，壓力傳感器接口(kou)使(shi)用(yong)方(fang)(fang)便，此閥可采(cai)用(yong)銅與不銹(xiu)鋼(gang)兩(liang)材質(zhi)，銅閥外(wai)部采(cai)用(yong)鍍鉻外(wai)觀看起來很有質(zhi)感，外(wai)觀看上去和不銹(xiu)鋼(gang)一(yi)樣，不銹(xiu)鋼(gang)采(cai)用(yong)304不銹(xiu)鋼(gang)材質(zhi)，內(nei)部密封采(cai)用(yong)高檔塑材王(wang)，使(shi)用(yong)壽命更長！這種類型的(de)(de)閥門(men)(men)的(de)(de)作用(yong)是只(zhi)允許介質(zhi)向(xiang)一(yi)個方(fang)(fang)向(xiang)流(liu)(liu)動(dong)(dong)(dong)，而(er)且阻止方(fang)(fang)向(xiang)流(liu)(liu)動(dong)(dong)(dong)。通常(chang)這種閥門(men)(men)是自動(dong)(dong)(dong)工作的(de)(de)，在一(yi)個方(fang)(fang)向(xiang)流(liu)(liu)動(dong)(dong)(dong)的(de)(de)流(liu)(liu)體(ti)壓力作用(yong)下，閥瓣(ban)打開；流(liu)(liu)體(ti)反(fan)方(fang)(fang)向(xiang)流(liu)(liu)動(dong)(dong)(dong)時，由流(liu)(liu)體(ti)壓力和閥瓣(ban)的(de)(de)自重合閥瓣(ban)作用(yong)于閥座(zuo)，從而(er)切斷(duan)流(liu)(liu)動(dong)(dong)(dong)。

五通止回閥(One-way valve)：止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)又稱單向閥(fa)(fa)(fa)(fa)或逆止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)閥(fa)(fa)(fa)(fa)，其作用(yong)是防止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)管(guan)路中的介(jie)質(zhi)(zhi)倒流(liu)。水泵吸水管(guan)的底(di)閥(fa)(fa)(fa)(fa)也屬于(yu)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)類。止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)按結構劃分(fen)，可分(fen)為(wei)(wei)(wei)升(sheng)降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)、旋啟(qi)式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)和(he)(he)蝶式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)三(san)種(zhong)(zhong)。升(sheng)降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)可分(fen)為(wei)(wei)(wei)立(li)式(shi)(shi)(shi)(shi)(shi)(shi)和(he)(he)臥式(shi)(shi)(shi)(shi)(shi)(shi)兩種(zhong)(zhong)。旋啟(qi)式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)分(fen)為(wei)(wei)(wei)單瓣(ban)(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)、雙瓣(ban)(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)和(he)(he)多瓣(ban)(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)三(san)種(zhong)(zhong)。蝶式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)為(wei)(wei)(wei)直(zhi)(zhi)通式(shi)(shi)(shi)(shi)(shi)(shi)、以上幾(ji)(ji)種(zhong)(zhong)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)在連(lian)(lian)接(jie)(jie)形式(shi)(shi)(shi)(shi)(shi)(shi)上可分(fen)為(wei)(wei)(wei)螺紋連(lian)(lian)接(jie)(jie)、法蘭連(lian)(lian)接(jie)(jie)和(he)(he)焊接(jie)(jie)三(san)種(zhong)(zhong)。 　　啟(qi)閉件靠介(jie)質(zhi)(zhi)流(liu)動(dong)和(he)(he)力量(liang)自(zi)行開啟(qi)或關(guan)閉，以防止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)介(jie)質(zhi)(zhi)倒流(liu)的閥(fa)(fa)(fa)(fa)門(men)叫(jiao)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)。止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)屬于(yu)自(zi)動(dong)閥(fa)(fa)(fa)(fa)類，主要用(yong)于(yu)介(jie)質(zhi)(zhi)單向流(liu)動(dong)的管(guan)道(dao)上，只允許介(jie)質(zhi)(zhi)向一個(ge)方向流(liu)動(dong)，以防止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)發生(sheng)事故(gu)。編輯本段結構　　止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)(Check Valve)：按結構劃分(fen)，可分(fen)為(wei)(wei)(wei)升(sheng)降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)、和(he)(he)蝶式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)三(san)種(zhong)(zhong)。升(sheng)降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)可分(fen)為(wei)(wei)(wei)立(li)式(shi)(shi)(shi)(shi)(shi)(shi)和(he)(he)直(zhi)(zhi)通式(shi)(shi)(shi)(shi)(shi)(shi)兩種(zhong)(zhong)。旋啟(qi)式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)分(fen)為(wei)(wei)(wei)單瓣(ban)(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)、雙瓣(ban)(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)和(he)(he)多瓣(ban)(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)三(san)種(zhong)(zhong)。蝶式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)為(wei)(wei)(wei)碟(die)式(shi)(shi)(shi)(shi)(shi)(shi)雙瓣(ban)(ban)(ban)、碟(die)式(shi)(shi)(shi)(shi)(shi)(shi)單瓣(ban)(ban)(ban)、以上幾(ji)(ji)種(zhong)(zhong)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)在連(lian)(lian)接(jie)(jie)形式(shi)(shi)(shi)(shi)(shi)(shi)上可分(fen)為(wei)(wei)(wei)螺紋連(lian)(lian)接(jie)(jie)、法蘭連(lian)(lian)接(jie)(jie)、焊接(jie)(jie)和(he)(he)對夾(jia)式(shi)(shi)(shi)(shi)(shi)(shi)連(lian)(lian)接(jie)(jie)四(si)種(zhong)(zhong)