大口径不锈钢止回阀是指依靠介质本身流动而自动开、闭阀瓣，用来防止介质倒流的阀门，又称逆止阀、单向阀、逆流阀、和背压阀。止回阀属于一种自动阀门，其主要作用是防止介质倒流、防止泵及驱动电动机反转，以及容器介质的泄放。止回阀还可用于给其中的压力可能升至超过系统压的辅助系统提供补给的管路上。止回阀主要可分为旋启式止回阀（依重心旋转）与升降式止回阀（沿轴线移动）。

大口径不锈钢止回阀的作用是只允许介质向一个方向流动，而且阻止反方向流动。通常这种阀门是自动工作的，在一个方向流动的流体压力作用下，阀瓣打开；流体反方向流动时，由流体压力和阀瓣的自重合阀瓣作用于阀座，从而切断流动。

http://www.zk-v.com/CV3000tiaojiefa/                    CV3000调节阀

http://www.zk-v.com/CV3000qidongtiaojiefa/        CV3000气动调节阀

http://www.zk-v.com/cv3000diandongtiaojiefa/      CV3000电动调节阀

http://www.zk-v.com/diandongtiaojiefa/      电动调节阀

http://www.zk-v.com/dddztjf/           电动单座调节阀

http://www.zk-v.com/ddtttjf/           电动套筒调节阀

http://www.zk-v.com/ddsttjf/               电动三通调节阀

http://www.zk-v.com/ddcftjf/               电动衬氟调节阀

http://www.zk-v.com/ddwktjf/               电动温控调节阀

http://www.zk-v.com/ddettjf/               电动二通调节阀

http://www.zk-v.com/ddgytjf/               电动高压调节阀     

http://www.zk-v.com/qidongtiaojiefa/       气动调节阀

http://www.zk-v.com/qdjxxtjf/              气动精小型调节阀  

http://www.zk-v.com/qdcftjf/               气动衬氟调节阀

http://www.zk-v.com/qddztjf/           气动单座调节阀

http://www.zk-v.com/qdtttjf/               气动套筒调节阀

http://www.zk-v.com/qdgytjf/               气动高压调节阀

http://www.zk-v.com/qdsttjf/               气动三通调节阀

http://www.zk-v.com/qdettjf/               气动二通调节阀

http://www.zk-v.com/tezhongtiaojiefa/    特种调节阀

http://www.zk-v.com/zilishitiaojiefa/    自力式调节阀

http://www.zk-v.com/qdVxtjf/             气动V型调节阀

http://www.zk-v.com/qdoxtjf/             气动O型调节阀

http://www.zk-v.com/ddtftjf/             电动通风调节阀

http://www.zk-v.com/yqzytjf/             氧气调节阀

http://www.zk-v.com/qdtftjf/             气动通风调节阀

http://www.zk-v.com/zlswdtjf/            自力式温度调节阀

http://www.zk-v.com/diandongfamen/       电动阀门

http://www.zk-v.com/diandongqiufa/       电动球阀

http://www.zk-v.com/diandongdiefa/       电动蝶阀

http://www.zk-v.com/diandongjiezhifa/    电动截止阀

http://www.zk-v.com/diandongzhafa/       电动闸阀

http://www.zk-v.com/diandongdaozhafa/    电动刀闸阀

http://www.zk-v.com/ddgyzf/              电动高压闸阀

http://www.zk-v.com/ddsfzf/              电动水封闸阀

http://www.zk-v.com/ddzkzf/              电动真空闸阀

http://www.zk-v.com/dddkjdf/             电动大口径蝶阀

http://www.zk-v.com/ddgwdf/              电动高温蝶阀

http://www.zk-v.com/ddtcf/               电动陶瓷球阀

http://www.zk-v.com/ddtcpz/              电动陶瓷排渣阀

http://www.zk-v.com/qidongfamen/         气动阀门

http://www.zk-v.com/qidongqiufa/         气动球阀

http://www.zk-v.com/qidongdiefa/       气动蝶阀   

http://www.zk-v.com/qidongzhafa/         气动闸阀

http://www.zk-v.com/qidongjiezhifa/      气动截止阀

http://www.zk-v.com/qidongdaozhafa/      气动刀闸阀

http://www.zk-v.com/qdtcqf/              气动陶瓷球阀

http://www.zk-v.com/qdtcjlf/             气动陶瓷进料阀

http://www.zk-v.com/qdtcclf/             气动陶瓷出料阀

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

http://www.zk-v.com/taocizhafa/          陶瓷闸阀

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

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

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

http://www.zk-v.com/taocidaozhafa/       陶瓷刀闸阀

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

http://www.zk-v.com/qieduanfa/           切断阀

http://www.zk-v.com/qidongqieduanfa/     气动切断阀

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

http://www.zk-v.com/paizhazhafa/         排渣闸阀

http://www.zk-v.com/duangangfamen/       锻钢阀门

http://www.zk-v.com/zhixingqifujian/     执行器及附件

http://www.zk-v.com/ddzxjg/              电动执行机构

http://www.zk-v.com/qdzxjg/              气动执行机构