大口徑不銹鋼止回閥是指依靠介質(zhì)本身流動而自動開、閉閥瓣，用來防止介質(zhì)倒流的閥門，又稱逆止閥、單向閥、逆流閥、和背壓閥。止回閥屬于一種自動閥門，其主要作用是防止介質(zhì)倒流、防止泵及驅(qū)動電動機(jī)反轉(zhuǎn)，以及容器介質(zhì)的泄放。止回閥還可用于給其中的壓力可能升至超過系統(tǒng)壓的輔助系統(tǒng)提供補(bǔ)給的管路上。止回閥主要可分為旋啟式止回閥（依重心旋轉(zhuǎn)）與升降式止回閥（沿軸線移動）。

大口徑不銹鋼止回閥的作用是只允許介質(zhì)向一個方向流動，而且阻止反方向流動。通常這種閥門是自動工作的，在一個方向流動的流體壓力作用下，閥瓣打開；流體反方向流動時，由流體壓力和閥瓣的自重合閥瓣作用于閥座，從而切斷流動。

http://www.zk-v.com/CV3000tiaojiefa/                    CV3000調(diào)節(jié)閥

http://www.zk-v.com/CV3000qidongtiaojiefa/        CV3000氣動調(diào)節(jié)閥

http://www.zk-v.com/cv3000diandongtiaojiefa/      CV3000電動調(diào)節(jié)閥

http://www.zk-v.com/diandongtiaojiefa/      電動調(diào)節(jié)閥

http://www.zk-v.com/dddztjf/           電動單座調(diào)節(jié)閥

http://www.zk-v.com/ddtttjf/           電動套筒調(diào)節(jié)閥

http://www.zk-v.com/ddsttjf/               電動三通調(diào)節(jié)閥

http://www.zk-v.com/ddcftjf/               電動襯氟調(diào)節(jié)閥

http://www.zk-v.com/ddwktjf/               電動溫控調(diào)節(jié)閥

http://www.zk-v.com/ddettjf/               電動二通調(diào)節(jié)閥

http://www.zk-v.com/ddgytjf/               電動高壓調(diào)節(jié)閥     

http://www.zk-v.com/qidongtiaojiefa/       氣動調(diào)節(jié)閥

http://www.zk-v.com/qdjxxtjf/              氣動精小型調(diào)節(jié)閥  

http://www.zk-v.com/qdcftjf/               氣動襯氟調(diào)節(jié)閥

http://www.zk-v.com/qddztjf/           氣動單座調(diào)節(jié)閥

http://www.zk-v.com/qdtttjf/               氣動套筒調(diào)節(jié)閥

http://www.zk-v.com/qdgytjf/               氣動高壓調(diào)節(jié)閥

http://www.zk-v.com/qdsttjf/               氣動三通調(diào)節(jié)閥

http://www.zk-v.com/qdettjf/               氣動二通調(diào)節(jié)閥

http://www.zk-v.com/tezhongtiaojiefa/    特種調(diào)節(jié)閥

http://www.zk-v.com/zilishitiaojiefa/    自力式調(diào)節(jié)閥

http://www.zk-v.com/qdVxtjf/             氣動V型調(diào)節(jié)閥

http://www.zk-v.com/qdoxtjf/             氣動O型調(diào)節(jié)閥

http://www.zk-v.com/ddtftjf/             電動通風(fēng)調(diào)節(jié)閥

http://www.zk-v.com/yqzytjf/             氧氣調(diào)節(jié)閥

http://www.zk-v.com/qdtftjf/             氣動通風(fēng)調(diào)節(jié)閥

http://www.zk-v.com/zlswdtjf/            自力式溫度調(diào)節(jié)閥

http://www.zk-v.com/diandongfamen/       電動閥門

http://www.zk-v.com/diandongqiufa/       電動球閥

http://www.zk-v.com/diandongdiefa/       電動蝶閥

http://www.zk-v.com/diandongjiezhifa/    電動截止閥

http://www.zk-v.com/diandongzhafa/       電動閘閥

http://www.zk-v.com/diandongdaozhafa/    電動刀閘閥

http://www.zk-v.com/ddgyzf/              電動高壓閘閥

http://www.zk-v.com/ddsfzf/              電動水封閘閥

http://www.zk-v.com/ddzkzf/              電動真空閘閥

http://www.zk-v.com/dddkjdf/             電動大口徑蝶閥

http://www.zk-v.com/ddgwdf/              電動高溫蝶閥

http://www.zk-v.com/ddtcf/               電動陶瓷球閥

http://www.zk-v.com/ddtcpz/              電動陶瓷排渣閥

http://www.zk-v.com/qidongfamen/         氣動閥門

http://www.zk-v.com/qidongqiufa/         氣動球閥

http://www.zk-v.com/qidongdiefa/       氣動蝶閥   

http://www.zk-v.com/qidongzhafa/         氣動閘閥

http://www.zk-v.com/qidongjiezhifa/      氣動截止閥

http://www.zk-v.com/qidongdaozhafa/      氣動刀閘閥

http://www.zk-v.com/qdtcqf/              氣動陶瓷球閥

http://www.zk-v.com/qdtcjlf/             氣動陶瓷進(jìn)料閥

http://www.zk-v.com/qdtcclf/             氣動陶瓷出料閥

http://www.zk-v.com/taocifa/             陶瓷閥

http://www.zk-v.com/taocizhafa/          陶瓷閘閥

http://www.zk-v.com/taociqiufa/          陶瓷球閥

http://www.zk-v.com/taocizhihuifa/       陶瓷止回閥

http://www.zk-v.com/taocidiefa/          陶瓷蝶閥

http://www.zk-v.com/taocidaozhafa/       陶瓷刀閘閥

http://www.zk-v.com/taocijiezhifa/       陶瓷截止閥

http://www.zk-v.com/qieduanfa/           切斷閥

http://www.zk-v.com/qidongqieduanfa/     氣動切斷閥

http://www.zk-v.com/paizhazhihuifa/      排渣止回閥

http://www.zk-v.com/paizhazhafa/         排渣閘閥

http://www.zk-v.com/duangangfamen/       鍛鋼閥門

http://www.zk-v.com/zhixingqifujian/     執(zhí)行器及附件

http://www.zk-v.com/ddzxjg/              電動執(zhí)行機(jī)構(gòu)

http://www.zk-v.com/qdzxjg/              氣動執(zhí)行機(jī)構(gòu)