高壓旋啟式止回閥介(jie)紹：

旋(xuan)(xuan)啟式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)作(zuo)用(yong)(yong)是(shi)只允許介質(zhi)(zhi)向一(yi)個(ge)(ge)方向流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)，而且阻(zu)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)方向流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)。通常(chang)這(zhe)種(zhong)(zhong)(zhong)閥(fa)(fa)(fa)(fa)(fa)門(men)是(shi)自(zi)(zi)動(dong)(dong)(dong)(dong)(dong)工作(zuo)的，在(zai)一(yi)個(ge)(ge)方向流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)的流(liu)(liu)(liu)體壓力(li)作(zuo)用(yong)(yong)下，閥(fa)(fa)(fa)(fa)(fa)瓣(ban)(ban)打開；流(liu)(liu)(liu)體反方向流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)時，由流(liu)(liu)(liu)體壓力(li)和(he)(he)(he)(he)閥(fa)(fa)(fa)(fa)(fa)瓣(ban)(ban)的自(zi)(zi)重合閥(fa)(fa)(fa)(fa)(fa)瓣(ban)(ban)作(zuo)用(yong)(yong)于(yu)閥(fa)(fa)(fa)(fa)(fa)座(zuo)，從(cong)而切斷流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)。 其(qi)中止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)就屬(shu)(shu)于(yu)這(zhe)種(zhong)(zhong)(zhong)類型的閥(fa)(fa)(fa)(fa)(fa)門(men)，它包括旋(xuan)(xuan)啟式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)和(he)(he)(he)(he)升降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)。旋(xuan)(xuan)啟式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)又稱單(dan)向閥(fa)(fa)(fa)(fa)(fa)或(huo)逆止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)閥(fa)(fa)(fa)(fa)(fa)，其(qi)作(zuo)用(yong)(yong)是(shi)防(fang)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)管路中的介質(zhi)(zhi)倒(dao)流(liu)(liu)(liu)。水泵吸水關的底閥(fa)(fa)(fa)(fa)(fa)也屬(shu)(shu)于(yu)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)類。啟閉(bi)件靠(kao)介質(zhi)(zhi)流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)和(he)(he)(he)(he)力(li)量自(zi)(zi)行開啟或(huo)關閉(bi)，以(yi)防(fang)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)介質(zhi)(zhi)倒(dao)流(liu)(liu)(liu)的閥(fa)(fa)(fa)(fa)(fa)門(men)叫止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)。止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)屬(shu)(shu)于(yu)自(zi)(zi)動(dong)(dong)(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)(fa)類，主(zhu)要用(yong)(yong)于(yu)介質(zhi)(zhi)單(dan)向流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)的管道上(shang)，只允許介質(zhi)(zhi)向一(yi)個(ge)(ge)方向流(liu)(liu)(liu)動(dong)(dong)(dong)(dong)(dong)，以(yi)防(fang)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)發生事(shi)故。止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)按(an)結(jie)構(gou)劃(hua)分(fen)，可分(fen)為升降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)、旋(xuan)(xuan)啟式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)和(he)(he)(he)(he)蝶式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)三種(zhong)(zhong)(zhong)。升降式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)可分(fen)為立式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)和(he)(he)(he)(he)臥式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)兩種(zhong)(zhong)(zhong)。旋(xuan)(xuan)啟式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)分(fen)為單(dan)瓣(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)、雙瓣(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)和(he)(he)(he)(he)多瓣(ban)(ban)式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)三種(zhong)(zhong)(zhong)。蝶式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)為直通式(shi)(shi)(shi)(shi)(shi)(shi)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)、以(yi)上(shang)幾種(zhong)(zhong)(zhong)止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)在(zai)連(lian)接形(xing)式(shi)(shi)(shi)(shi)(shi)(shi)上(shang)可分(fen)為螺紋(wen)連(lian)接止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)、法蘭(lan)連(lian)接止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)和(he)(he)(he)(he)焊接止(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)(zhi)回(hui)(hui)(hui)閥(fa)(fa)(fa)(fa)(fa)三種(zhong)(zhong)(zhong)。

高壓旋啟式止回閥選型標(biao)準

1. 為了防止(zhi)(zhi)介質逆流(liu)，在設備、裝置和管道(dao)上(shang)都應安裝止(zhi)(zhi)回(hui)閥；

2. 止回閥一(yi)般適(shi)用于(yu)清(qing)凈介質(zhi)(zhi)，不宜(yi)用于(yu)含(han)有固體顆粒和粘度較大的介質(zhi)(zhi)；

3. 一般在公稱(cheng)通經50mm的水平(ping)管道上都應選用(yong)立(li)式(shi)升降止回(hui)閥；

4. 直通式升降止回閥在水平管(guan)道和垂(chui)直管(guan)道上(shang)都(dou)可安裝；

5. 對于水泵(beng)進口管(guan)(guan)路，宜選用底(di)閥(fa)，底(di)閥(fa)一般只(zhi)安裝(zhuang)在泵(beng)進口的垂(chui)直管(guan)(guan)道(dao)上，并(bing)且介質自下而(er)上流動；

6. 升(sheng)降式(shi)(shi)旋啟(qi)式(shi)(shi)密封性好，流體阻力大，臥式(shi)(shi)宜裝(zhuang)在(zai)水(shui)平(ping)管道(dao)上，立式(shi)(shi)裝(zhuang)在(zai)垂直管道(dao)上；

法蘭旋啟(qi)式止回(hui)閥結(jie)構和安裝方式：

1、高壓止(zhi)回(hui)(hui)閥(fa)(fa)的(de)(de)閥(fa)(fa)瓣(ban)呈(cheng)圓盤狀，繞閥(fa)(fa)座通(tong)道的(de)(de)轉軸(zhou)作旋轉運動，因閥(fa)(fa)內(nei)通(tong)道成流(liu)線型(xing)，流(liu)動阻(zu)力(li)(li)比升(sheng)蝶(die)式(shi)(shi)止(zhi)回(hui)(hui)閥(fa)(fa)小，適用(yong)于低流(liu)速(su)和(he)流(liu)動不(bu)常變化(hua)的(de)(de)大(da)口徑(jing)場合(he)，但(dan)不(bu)宜(yi)用(yong)于脈動流(liu)，其密封性能不(bu)及升(sheng)降(jiang)式(shi)(shi)。蝶(die)式(shi)(shi)止(zhi)回(hui)(hui)閥(fa)(fa)分(fen)單(dan)瓣(ban)式(shi)(shi)、雙瓣(ban)式(shi)(shi)和(he)多半式(shi)(shi)三(san)種，這三(san)種形(xing)式(shi)(shi)主要按(an)閥(fa)(fa)門(men)口徑(jing)來分(fen)，目(mu)的(de)(de)是(shi)為了防止(zhi)介質停(ting)止(zhi)流(liu)動或倒(dao)流(liu)時，減弱水(shui)力(li)(li)沖擊。

2、高壓止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)瓣(ban)沿著(zhu)閥(fa)(fa)(fa)體(ti)垂直(zhi)中心線滑動的止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)，內螺紋止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)只能安裝在水平管道上，在高壓小口徑止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)上閥(fa)(fa)(fa)瓣(ban)可采用(yong)圓球。蝶(die)式止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)的閥(fa)(fa)(fa)體(ti)形狀與(yu)(yu)截(jie)止(zhi)(zhi)閥(fa)(fa)(fa)一樣(可與(yu)(yu)截(jie)止(zhi)(zhi)閥(fa)(fa)(fa)通(tong)用(yong))，因此它的流體(ti)阻力(li)系數較大。其結(jie)構與(yu)(yu)截(jie)止(zhi)(zhi)閥(fa)(fa)(fa)相似，閥(fa)(fa)(fa)體(ti)和閥(fa)(fa)(fa)瓣(ban)與(yu)(yu)截(jie)止(zhi)(zhi)閥(fa)(fa)(fa)相同(tong)。閥(fa)(fa)(fa)瓣(ban)上部和閥(fa)(fa)(fa)蓋下部加工有導向套(tao)簡，閥(fa)(fa)(fa)瓣(ban)導向簡可在閥(fa)(fa)(fa)盞導向簡內自由升降，當介(jie)(jie)質(zhi)順流時，閥(fa)(fa)(fa)瓣(ban)靠介(jie)(jie)質(zhi)推力(li)開啟(qi)，當介(jie)(jie)質(zhi)停(ting)流時，閥(fa)(fa)(fa)瓣(ban)靠自垂降落(luo)在閥(fa)(fa)(fa)座上，起阻止(zhi)(zhi)介(jie)(jie)質(zhi)逆流作用(yong)。直(zhi)通(tong)式蝶(die)式止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)介(jie)(jie)質(zhi)進(jin)出口通(tong)道方向與(yu)(yu)閥(fa)(fa)(fa)座通(tong)道方向垂直(zhi);立式升降式止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)，其介(jie)(jie)質(zhi)進(jin)出口通(tong)道方向與(yu)(yu)閥(fa)(fa)(fa)座通(tong)道方向相同(tong)，其流動阻力(li)較直(zhi)通(tong)式小。

3、高壓止(zhi)回閥(fa)(fa)：閥(fa)(fa)瓣圍繞(rao)閥(fa)(fa)座內的(de)銷軸旋轉的(de)止(zhi)回閥(fa)(fa)。碟(die)式止(zhi)回閥(fa)(fa)結構簡(jian)單，只(zhi)能安裝在水平管道上，密封性較(jiao)好。

4、高壓止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)：閥(fa)(fa)(fa)(fa)瓣沿著(zhu)閥(fa)(fa)(fa)(fa)體(ti)中心(xin)線(xian)滑動的(de)閥(fa)(fa)(fa)(fa)門。管道式止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)是(shi)新出現的(de)一(yi)(yi)種閥(fa)(fa)(fa)(fa)門，它的(de)體(ti)積小，重量較輕，加工(gong)工(gong)藝性(xing)好，是(shi)止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)發展方向(xiang)之(zhi)一(yi)(yi)。但流(liu)體(ti)阻(zu)力系(xi)數比旋啟(qi)式止(zhi)(zhi)回(hui)(hui)閥(fa)(fa)(fa)(fa)略(lve)大(da)。

5、高壓(ya)止回閥(fa)(fa)(fa)：這種閥(fa)(fa)(fa)門是做為(wei)鍋爐給水和(he)(he)蒸汽切斷用閥(fa)(fa)(fa)，它具有(you)升降式止回閥(fa)(fa)(fa)和(he)(he)截止閥(fa)(fa)(fa)或角(jiao)閥(fa)(fa)(fa)的綜合機能。

此外(wai)，還有—些不適用于(yu)泵出口安裝的止回閥，如底(di)閥、彈(dan)簧(huang)式，Y型等止回閥。