大口徑不銹鋼止回閥是指依靠介質本身流動而自動開、閉閥瓣，用來防止介質倒流的閥門，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倒流、防止泵及驅動電動機反轉，以及容器介質的泄放。止回閥還可用于給其中的壓力可能升至超過系統壓的輔助系統提供補給的管路上。止回閥主要可分為旋啟式止回閥（依重心旋轉）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調節閥

http://www.zk-v.com/CV3000qidongtiaojiefa/        CV3000氣動調節閥

http://www.zk-v.com/cv3000diandongtiaojiefa/      CV3000電動調節閥

http://www.zk-v.com/diandongtiaojiefa/      電動調節閥

http://www.zk-v.com/dddztjf/           電動單座調節閥

http://www.zk-v.com/ddtttjf/           電動套筒調節閥

http://www.zk-v.com/ddsttjf/               電動三通調節閥

http://www.zk-v.com/ddcftjf/               電動襯氟調節閥

http://www.zk-v.com/ddwktjf/               電動溫控調節閥

http://www.zk-v.com/ddettjf/               電動二通調節閥

http://www.zk-v.com/ddgytjf/               電動高壓調節閥     

http://www.zk-v.com/qidongtiaojiefa/       氣動調節閥

http://www.zk-v.com/qdjxxtjf/              氣動精小型調節閥  

http://www.zk-v.com/qdcftjf/               氣動襯氟調節閥

http://www.zk-v.com/qddztjf/           氣動單座調節閥

http://www.zk-v.com/qdtttjf/               氣動套筒調節閥

http://www.zk-v.com/qdgytjf/               氣動高壓調節閥

http://www.zk-v.com/qdsttjf/               氣動三通調節閥

http://www.zk-v.com/qdettjf/               氣動二通調節閥

http://www.zk-v.com/tezhongtiaojiefa/    特種調節閥

http://www.zk-v.com/zilishitiaojiefa/    自力式調節閥

http://www.zk-v.com/qdVxtjf/             氣動V型調節閥

http://www.zk-v.com/qdoxtjf/             氣動O型調節閥

http://www.zk-v.com/ddtftjf/             電動通風調節閥

http://www.zk-v.com/yqzytjf/             氧氣調節閥

http://www.zk-v.com/qdtftjf/             氣動通風調節閥

http://www.zk-v.com/zlswdtjf/            自力式溫度調節閥

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/     執行器及附件

http://www.zk-v.com/ddzxjg/              電動執行機構

http://www.zk-v.com/qdzxjg/              氣動執行機構