止(zhi)(zhi)(zhi)回(hui)(hui)閥(CheckValve)：按結構劃分,可(ke)(ke)分為升降式(shi)(shi)(shi)止(zhi)(zhi)(zhi)回(hui)(hui)閥、旋(xuan)(xuan)啟式(shi)(shi)(shi)止(zhi)(zhi)(zhi)回(hui)(hui)閥和(he)蝶式(shi)(shi)(shi)止(zhi)(zhi)(zhi)回(hui)(hui)閥三(san)種(zhong)(zhong)。升降式(shi)(shi)(shi)止(zhi)(zhi)(zhi)回(hui)(hui)閥可(ke)(ke)分為立式(shi)(shi)(shi)和(he)臥(wo)式(shi)(shi)(shi)兩種(zhong)(zhong)。旋(xuan)(xuan)啟式(shi)(shi)(shi)止(zhi)(zhi)(zhi)回(hui)(hui)閥分為單瓣式(shi)(shi)(shi)、雙瓣式(shi)(shi)(shi)和(he)多瓣式(shi)(shi)(shi)三(san)種(zhong)(zhong)。蝶式(shi)(shi)(shi)止(zhi)(zhi)(zhi)回(hui)(hui)閥為直通式(shi)(shi)(shi)。以上幾種(zhong)(zhong)止(zhi)(zhi)(zhi)回(hui)(hui)閥在連(lian)(lian)接形式(shi)(shi)(shi)上可(ke)(ke)分為螺紋連(lian)(lian)接、法蘭連(lian)(lian)接、焊接和(he)對夾式(shi)(shi)(shi)連(lian)(lian)接四種(zhong)(zhong)。

旋(xuan)啟式黃(huang)銅止回(hui)閥H14W-16T公稱壓力(li)：2.0MPa工作介(jie)(jie)質(zhi)(zhi)(zhi)：水(shui)、海水(shui)、非腐蝕(shi)性液體、飽和(he)蒸汽工作溫度：-20℃≤t≤180℃管(guan)螺(luo)紋符合ISO7標準(zhun)青銅、黃(huang)銅,啟閉(bi)件靠(kao)介(jie)(jie)質(zhi)(zhi)(zhi)流動(dong)和(he)力(li)量自行開啟或(huo)關(guan)閉(bi),以防止介(jie)(jie)質(zhi)(zhi)(zhi)倒流的(de)閥門叫止回(hui)閥。止回(hui)閥屬于自動(dong)閥類,主(zhu)要(yao)用(yong)于介(jie)(jie)質(zhi)(zhi)(zhi)單向(xiang)流動(dong)的(de)管(guan)道上,只允許(xu)介(jie)(jie)質(zhi)(zhi)(zhi)向(xiang)一個方向(xiang)流動(dong),以防止發生事故。