ZZDQ帶指揮器操作壓力調(diào)節(jié)閥－特點:
•無需外加能源，能在無電、無氣的場合工作，既方便，又節(jié)約能源，降低成本；
•氮封裝置供氮、泄氮壓力設(shè)定方便，可在連續(xù)生產(chǎn)的條件下進(jìn)行；
•壓力檢測膜片有效面積大，設(shè)定彈簧剛度小，動作靈敏，裝置工作平穩(wěn)；
•采用無填料設(shè)計，閥桿所受磨擦力小，反應(yīng)迅速，控制精度高；
•供氮裝置采用指揮器操作，減壓比可達(dá)100：1，減壓效果好，控制精度高；
•為確保儲罐的安全，需在罐頂設(shè)置呼吸閥；
•呼吸閥僅起安全作用，避免了常規(guī)氮封裝置中啟閉頻繁易損壞的缺陷。

ZZDQ帶指揮器操作壓力調(diào)節(jié)閥－結(jié)構(gòu)與工作原理:
　　(見圖一)和泄氮裝置（見圖二)兩部分組成。供氮裝置由指揮器和主閥兩部分組成；泄氮裝置由反饋的壓開型微壓調(diào)節(jié)閥組成。氮氣壓力一般設(shè)為100mmH2O，通過氮封裝置精確控制。
　　當(dāng)儲罐進(jìn)液閥開啟，向罐內(nèi)添加物料時，液面上升，氣相部分容積減小，壓力升高，當(dāng)罐內(nèi)壓力升至高于泄氮裝置壓力設(shè)定值時，泄氮裝置打開，向外界釋放氮氣。使罐內(nèi)壓力下降，降至泄氮壓力設(shè)定點時，泄氮裝置自動關(guān)閉。
　　當(dāng)儲罐出液閥開啟，用戶放料時，氣相部分容積增大，罐內(nèi)壓力降低，供氮裝置開啟，向儲罐注入氮氣，使罐內(nèi)壓力上升，當(dāng)罐內(nèi)壓力上升至供氮裝置自動關(guān)閉。

供氮裝置－工作原理:
　　氮封裝置結(jié)構(gòu)(見圖四)，將設(shè)在罐頂?shù)娜狐c的介質(zhì)經(jīng)導(dǎo)壓管引入檢測機(jī)構(gòu)(7)、介質(zhì)在檢測元件上產(chǎn)生一個作用力與彈簧(8)、預(yù)緊力相平衡。當(dāng)罐內(nèi)壓力降低至低于供氮裝置壓力設(shè)定點時，平衡破壞，使指揮器閥芯(6)打開，使閥前氣體經(jīng)減壓閥(5)、節(jié)流閥(4)、進(jìn)入主閥執(zhí)行機(jī)構(gòu)(3)上、下膜室，打開主閥閥芯(2)、向罐內(nèi)充注氮氣；當(dāng)罐內(nèi)壓力升至供氮裝置壓力設(shè)定點，由于預(yù)設(shè)彈簧力，關(guān)閉指揮器閥芯(6)、由于主閥執(zhí)行機(jī)構(gòu)中彈簧作用，關(guān)閉主閥，停止供氮。

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)