ZDL-PN16-C-25,ZDL-PN25-RL-50,ZDL-PN40-R-40,ZDL-PN64-P-32,自動循環(huán)泵保護閥

ZDL-PN16-C-25,ZDL-PN25-RL-50,ZDL-PN40-R-40,ZDL-PN64-P-32,自動循環(huán)泵保護閥

概述
ZDL系列自動循環(huán)泵保護閥是一種泵保護裝置。它自動對離心泵（尤其輸送熱水介質(zhì)）在低負荷運行時泵體內(nèi)可能出現(xiàn)的部分氣蝕損害和不穩(wěn)定進行保護。一旦泵流量低于預設流量，旁路完全打開以確保泵所需最小流量。即使主路完全關閉，即主路流量為零，最小流量也可以通過旁路進行自動循環(huán)。壓力通過旁路中的集成多級節(jié)流減壓閥降低。ZDL系列有適合中等壓差的旁路，壓差最大至6MPa，具體選擇由工廠確定。獨特的L型旁同可消除高速流動介質(zhì)產(chǎn)生的噪音，防止氣蝕。
特點
多孔籠式旁路，低噪音，適用于中低壓工況。
鍛造閥體，可選用碳鋼或不銹鋼材質(zhì)等。
標準型旁路帶止回功能，最大工作壓差至6MPa。
帶有文丘里流道的主路止回結(jié)構(gòu)，適應復雜工況。
壓力等級PN16-PN100，口徑DN25-DN500。
可選擇增加手動旁路操作功能，以備故障時使用。
尺寸壓力范圍

作用原理
根據(jù)感應到的主路流量不同,自動再循環(huán)閥的主閥瓣止回錐將自動移動到某一個位置上。同時主閥瓣帶動旁路閥杠桿,將主閥瓣動作傳遞至旁路，通過杠桿控制旁路閥閥瓣的位置，改變旁路的節(jié)流面積，從而控制通過旁路的流量。當主閥瓣回至閥座關閉狀態(tài)時,所有流量通過旁路回流。當主閥瓣上升至頂端位置時,旁路則完全關閉,所有泵的流量流向工藝系統(tǒng)。該閥集四種功能于一體。
流量感知：自動再循環(huán)閥的主閥瓣能自動感知工藝系統(tǒng)中的主流量，從而根據(jù)此流量來確定主閥瓣和旁路閥瓣的位置。
再循環(huán)控制：自動再循環(huán)閥可以將泵正常運行所需要的最小流量通過旁路吸入到存儲裝置中，調(diào)節(jié)水泵的H-Q特性，實現(xiàn)再循環(huán)。
旁路多級減壓：旁路控制系統(tǒng)能低噪音小磨損的把回流介質(zhì)從泵出口的高壓減至適宜回流存儲裝置中的低壓
止回：自動再循環(huán)閥還具有止回閥的作用，防止液體回流到泵體中。標準型旁路帶止回功能。
其它旁路尺寸可按要求制作；最大的旁路流量取決于最大的Kv值。

ZDL-PN16-C-25,ZDL-PN16-C-32,ZDL-PN16-C-40,ZDL-PN16-C-50,ZDL-PN16-C-65,ZDL-PN16-C-80,
ZDL-PN16-C-100,ZDL-PN16-C-200,ZDL-PN16-C-250,ZDL-PN16-C-300,ZDL-PN16-C-350,ZDL-PN16-C-400,
ZDL-PN16-P-25,ZDL-PN16-P-32,ZDL-PN16-P-40,ZDL-PN16-P-50,ZDL-PN16-P-65,ZDL-PN16-P-80,
ZDL-PN16-P-100,ZDL-PN16-P-200,ZDL-PN16-P-250,ZDL-PN16-P-300,ZDL-PN16-P-350,ZDL-PN16-P-400,
ZDL-PN16-R-25,ZDL-PN16-R-32,ZDL-PN16-R-40,CCLAIR,ZDL-PN16-R-50,ZDL-PN16-R-65,ZDL-PN16-R-80,
ZDL-PN16-R-100,ZDL-PN16-R-200,ZDL-PN16-R-250,ZDL-PN16-R-300,ZDL-PN16-R-350,ZDL-PN16-R-400,
ZDL-PN16-LC-25,ZDL-PN16-LC-32,ZDL-PN16-LC-40,ZDL-PN16-LC-50,ZDL-PN16-LC-65,ZDL-PN16-LC-80,
ZDL-PN16-LC-100,ZDL-PN16-LC-200,ZDL-PN16-LC-250,ZDL-PN16-LC-300,ZDL-PN16-LC-350,ZDL-PN16-LC-400,
ZDL-PN16-PL-25,ZDL-PN16-PL-32,ZDL-PN16-PL-40,ZDL-PN16-PL-50,ZDL-PN16-PL-65,ZDL-PN16-PL-80,
ZDL-PN16-PL-100,ZDL-PN16-PL-200,ZDL-PN16-PL-250,ZDL-PN16-PL-300,ZDL-PN16-PL-350,ZDL-PN16-PL-400,
ZDL-PN16-RL-25,ZDL-PN16-RL-32,ZDL-PN16-RL-40,ZDL-PN16-RL-50,ZDL-PN16-RL-65,ZDL-PN16-RL-80,
ZDL-PN16-RL-100,ZDL-PN16-RL-200,ZDL-PN16-RL-250,ZDL-PN16-RL-300,ZDL-PN16-RL-350,ZDL-PN16-RL-400,
ZDL-PN25-C-25,ZDL-PN25-C-32,ZDL-PN25-C-40,ZDL-PN25-C-50,ZDL-PN25-C-65,ZDL-PN25-C-80,
ZDL-PN25-C-100,ZDL-PN25-C-200,ZDL-PN25-C-250,ZDL-PN25-C-300,ZDL-PN25-C-350,ZDL-PN25-C-400,
ZDL-PN25-P-25,ZDL-PN25-P-32,ZDL-PN25-P-40,CCLAIR,ZDL-PN25-P-50,ZDL-PN25-P-65,ZDL-PN25-P-80,
ZDL-PN25-P-100,ZDL-PN25-P-200,ZDL-PN25-P-250,ZDL-PN25-P-300,ZDL-PN25-P-350,ZDL-PN25-P-400,
ZDL-PN25-R-25,ZDL-PN25-R-32,ZDL-PN25-R-40,ZDL-PN25-R-50,ZDL-PN25-R-65,ZDL-PN25-R-80,
ZDL-PN25-R-100,ZDL-PN25-R-200,ZDL-PN25-R-250,ZDL-PN25-R-300,ZDL-PN25-R-350,ZDL-PN25-R-400,
ZDL-PN25-LC-25,ZDL-PN25-LC-32,ZDL-PN25-LC-40,ZDL-PN25-LC-50,ZDL-PN25-LC-65,ZDL-PN25-LC-80,
ZDL-PN25-LC-100,ZDL-PN25-LC-200,ZDL-PN25-LC-250,ZDL-PN25-LC-300,ZDL-PN25-LC-350,ZDL-PN25-LC-400,
ZDL-PN25-PL-25,ZDL-PN25-PL-32,ZDL-PN25-PL-40,ZDL-PN25-PL-50,ZDL-PN25-PL-65,ZDL-PN25-PL-80,
ZDL-PN25-PL-100,ZDL-PN25-PL-200,ZDL-PN25-PL-250,ZDL-PN25-PL-300,ZDL-PN25-PL-350,ZDL-PN25-PL-400,
ZDL-PN25-RL-25,ZDL-PN25-RL-32,ZDL-PN25-RL-40,ZDL-PN25-RL-50,ZDL-PN25-RL-65,ZDL-PN25-RL-80,
ZDL-PN25-RL-100,ZDL-PN25-RL-200,ZDL-PN25-RL-250,ZDL-PN25-RL-300,ZDL-PN25-RL-350,ZDL-PN25-RL-400,
ZDL-PN40-C-25,ZDL-PN40-C-32,ZDL-PN40-C-40,ZDL-PN40-C-50,ZDL-PN40-C-65,ZDL-PN40-C-80,
ZDL-PN40-C-100,ZDL-PN40-C-200,ZDL-PN40-C-250,ZDL-PN40-C-300,ZDL-PN40-C-350,ZDL-PN40-C-400,
ZDL-PN40-P-25,ZDL-PN40-P-32,ZDL-PN40-P-40,ZDL-PN40-P-50,ZDL-PN40-P-65,ZDL-PN40-P-80,
ZDL-PN40-P-100,ZDL-PN40-P-200,ZDL-PN40-P-250,ZDL-PN40-P-300,ZDL-PN40-P-350,ZDL-PN40-P-400,
ZDL-PN40-R-25,ZDL-PN40-R-32,ZDL-PN40-R-40,ZDL-PN40-R-50,ZDL-PN40-R-65,ZDL-PN40-R-80,
ZDL-PN40-R-100,ZDL-PN40-R-200,ZDL-PN40-R-250,ZDL-PN40-R-300,ZDL-PN40-R-350,ZDL-PN40-R-400,
ZDL-PN40-LC-25,ZDL-PN40-LC-32,ZDL-PN40-LC-40,ZDL-PN40-LC-50,ZDL-PN40-LC-65,ZDL-PN40-LC-80,
ZDL-PN40-LC-100,ZDL-PN40-LC-200,ZDL-PN40-LC-250,ZDL-PN40-LC-300,ZDL-PN40-LC-350,ZDL-PN40-LC-400,
ZDL-PN40-PL-25,ZDL-PN40-PL-32,ZDL-PN40-PL-40,CCLAIR,ZDL-PN40-PL-50,ZDL-PN40-PL-65,ZDL-PN40-PL-80,
ZDL-PN40-PL-100,ZDL-PN40-PL-200,ZDL-PN40-PL-250,ZDL-PN40-PL-300,ZDL-PN40-PL-350,ZDL-PN40-PL-400,
ZDL-PN40-RL-25,ZDL-PN40-RL-32,ZDL-PN40-RL-40,ZDL-PN40-RL-50,ZDL-PN40-RL-65,ZDL-PN40-RL-80,
ZDL-PN40-RL-100,ZDL-PN40-RL-200,ZDL-PN40-RL-250,ZDL-PN40-RL-300,ZDL-PN40-RL-350,ZDL-PN40-RL-400,
ZDL-PN64-C-25,ZDL-PN64-C-32,ZDL-PN64-C-40,ZDL-PN64-C-50,ZDL-PN64-C-65,ZDL-PN64-C-80,
ZDL-PN64-C-100,ZDL-PN64-C-200,ZDL-PN64-C-250,ZDL-PN64-C-300,ZDL-PN64-C-350,ZDL-PN64-C-400,
ZDL-PN64-P-25,ZDL-PN64-P-32,ZDL-PN64-P-40,ZDL-PN64-P-50,ZDL-PN64-P-65,ZDL-PN64-P-80,
ZDL-PN64-P-100,ZDL-PN64-P-200,ZDL-PN64-P-250,ZDL-PN64-P-300,ZDL-PN64-P-350,ZDL-PN64-P-400,
ZDL-PN64-R-25,ZDL-PN64-R-32,ZDL-PN64-R-40,ZDL-PN64-R-50,ZDL-PN64-R-65,ZDL-PN64-R-80,
ZDL-PN64-R-100,ZDL-PN64-R-200,ZDL-PN64-R-250,ZDL-PN64-R-300,ZDL-PN64-R-350,ZDL-PN64-R-400,
ZDL-PN64-LC-25,ZDL-PN64-LC-32,ZDL-PN64-LC-40,ZDL-PN64-LC-50,ZDL-PN64-LC-65,ZDL-PN64-LC-80,
ZDL-PN64-LC-100,ZDL-PN64-LC-200,ZDL-PN64-LC-250,ZDL-PN64-LC-300,ZDL-PN64-LC-350,ZDL-PN64-LC-400,
ZDL-PN64-PL-25,ZDL-PN64-PL-32,ZDL-PN64-PL-40,ZDL-PN64-PL-50,ZDL-PN64-PL-65,ZDL-PN64-PL-80,
ZDL-PN64-PL-100,ZDL-PN64-PL-200,ZDL-PN64-PL-250,ZDL-PN64-PL-300,ZDL-PN64-PL-350,ZDL-PN64-PL-400,
ZDL-PN64-RL-25,ZDL-PN64-RL-32,ZDL-PN64-RL-40,ZDL-PN64-RL-50,ZDL-PN64-RL-65,ZDL-PN64-RL-80,
ZDL-PN64-RL-100,ZDL-PN64-RL-200,ZDL-PN64-RL-250,ZDL-PN64-RL-300,ZDL-PN64-RL-350,ZDL-PN64-RL-400,