ACQS32*70-B –N ACQS32*75-B –N ACQS32*80-B –N ACQS32*90-B –N ACQS32*100-B –N ATQ ASQ ACQ32*5-B –N ACQ32*10-B –N ACQ32*15-B –N ACQ32*20-B –N ACQ32*25-B –N ACQ32*30-B –N ACQ32*35-B –N ACQ32*40-B –N ACQ32*45-B –N ACQ32*50-B –N ACQ32*55-B –N ACQ32*60-B –N ACQ32*70-B –N ACQ32*75-B –N ACQ32*80-B –N ACQ32*90-B –N ACQ32*100-B –N ATQ ASQ ACQS40*5-B –N ACQS40*10-B –N ACQS40*15-B –N ACQS40*20-B –N ACQS40*25-B –N ACQS40*30-B –N ACQS40*35-B –N ACQS40*40-B –N ACQS40*45-B –N ACQS40*50-B –N ACQS40*55-B –N ACQS40*60-B –N ACQS40*70-B –N ACQS40*75-B –N ACQS40*80-B –N ACQS40*90-B –N ACQS40*100-B –N ATQ ASQ ACQ40*5-B –N ACQ40*10-B –N ACQ40*15-B –N ACQ40*20-B –N ACQ40*25-B –N ACQ40*30-B –N ACQ40*35-B –N ACQ40*40-B –N ACQ40*45-B –N ACQ40*50-B –N ACQ40*55-B –N ACQ40*60-B –N ACQ40*70-B –N ACQ40*75-B –N ACQ40*80-B –N ACQ40*90-B –N ACQ40*100-B –N ATQ ASQ ACQS50*5-B –N ACQS50*10-B –N ACQS50*15-B –N ACQS50*20-B –N ACQS50*25-B –N ACQS50*30-B –N ACQS50*35-B –N ACQS50*40-B –N ACQS50*45-B –N ACQS50*50-B –N ACQS50*55-B –N ACQS50*60-B –N ACQS50*70-B –N ACQS50*75-B –N ACQS50*80-B –N ACQS50*90-B –N ACQS50*100-B –N ATQ ASQ ACQ50*5-B –N ACQ50*10-B –N ACQ50*15-B –N ACQ50*20-B –N ACQ50*25-B –N ACQ50*30-B –N ACQ50*35-B –N ACQ50*40-B –N ACQ50*45-B –N ACQ50*50-B –N ACQ50*55-B –N ACQ50*60-B –N ACQ50*70-B –N ACQ50*75-B –N ACQ50*80-B –N 置，平時(shí)不通電，處于微啟狀態(tài)，閥門提供初始流量；給一種電信號(hào)，電磁閥全開，提供大流量；給另種電信號(hào)，閥門關(guān)閥。閥門還帶有手動(dòng)裝置，使得長(zhǎng)期關(guān)閥時(shí)也不需耗電。三位電磁閥可視為一種結(jié)構(gòu)更為緊湊的雙聯(lián)電磁閥，它很方便地實(shí)現(xiàn)三位調(diào)節(jié)，得到了很多應(yīng)用。進(jìn)一步的思路是n個(gè)大小成一定比例的電磁閥組成2n種流量,類似于數(shù)字電路稱這種組合閥為數(shù)字閥。實(shí)際上兩個(gè)大小不同的雙聯(lián)閥或三位閥就可產(chǎn)生24=16或32=9種流量,已經(jīng)能達(dá)非常高的精度。從原理上說(shuō),它與工控計(jì)算機(jī)配套具有優(yōu)勢(shì),但由于應(yīng)用領(lǐng)域還沒有提出大量的需求,這項(xiàng)技術(shù)尚處于試驗(yàn)階段。(3)自保持型電磁闊 自保持型電磁閥就是只需瞬間通電即完成閥門開關(guān)動(dòng)作,閥芯位置不需電來(lái)保持。它的優(yōu)點(diǎn)在于節(jié)約能源尤其是用電池作電源的場(chǎng)合，而且可不考慮溫升，從而線圈壽命長(zhǎng)，在高低溫、防爆等場(chǎng)合有較高安全性。常見的有機(jī)械式保持和永磁體保持，又分雙線圈和單線圈，以單線圈磁保持結(jié)構(gòu)***為簡(jiǎn)單。它是以改變直流電源極性改變對(duì)應(yīng)閥門開關(guān)的兩種狀態(tài)。這種電磁閥單獨(dú)安裝線圈外部接線需加轉(zhuǎn)換開關(guān)，而與智能儀表配套則十分方便。IC卡預(yù)收費(fèi)煤氣表和水表所配的電磁閥是儀表成敗的關(guān)鍵之一，其中的自保持技術(shù)又是電磁閥的成敗的重要因素，國(guó)內(nèi)的