當市政管(guan)(guan)(guan)網停水(shui)(shui)(shui)(shui)時(shi)，水(shui)(shui)(shui)(shui)泵機(ji)(ji)(ji)組(zu)(zu)仍可繼續工(gong)作，直到穩壓補償器中(zhong)的(de)水(shui)(shui)(shui)(shui)位下(xia)降至液(ye)位的(de)下(xia)限后自(zi)(zi)動關(guan)機(ji)(ji)(ji)，來(lai)(lai)水(shui)(shui)(shui)(shui)后又自(zi)(zi)動開(kai)機(ji)(ji)(ji)。控制系(xi)統停電時(shi)，水(shui)(shui)(shui)(shui)泵機(ji)(ji)(ji)組(zu)(zu)停止工(gong)作，自(zi)(zi)來(lai)(lai)水(shui)(shui)(shui)(shui)可通(tong)過市政管(guan)(guan)(guan)網與用(yong)戶之(zhi)間的(de)連(lian)通(tong)管(guan)(guan)(guan)進(jin)入用(yong)戶管(guan)(guan)(guan)網，為低(di)樓層用(yong)戶供水(shui)(shui)(shui)(shui)，來(lai)(lai)電時(shi)機(ji)(ji)(ji)組(zu)(zu)自(zi)(zi)動開(kai)機(ji)(ji)(ji)恢復(fu)正常供水(shui)(shui)(shui)(shui)。無負(fu)壓供水(shui)(shui)(shui)(shui)是(shi)一種(zhong)高校節(jie)能的(de)給水(shui)(shui)(shui)(shui)方(fang)式，深得(de)廣大(da)用(yong)戶的(de)青睞。

      水(shui)泵如(ru)果直接(jie)(jie)連接(jie)(jie)在市(shi)政(zheng)管(guan)網(wang)(wang)上，充分利(li)用(yong)了(le)市(shi)政(zheng)管(guan)網(wang)(wang)原(yuan)有(you)(you)的(de)壓(ya)力，節能效果好，不需(xu)要建造(zao)蓄水(shui)池(chi)，直接(jie)(jie)與市(shi)政(zheng)管(guan)網(wang)(wang)連接(jie)(jie)，沒有(you)(you)水(shui)質的(de)二(er)次污染(ran). 　　

      但我國城市供水(shui)(shui)條例規定為(wei)了防止對周圍居民用(yong)(yong)水(shui)(shui)產生(sheng)(sheng)影(ying)響(xiang)(xiang)，不許將生(sheng)(sheng)活、生(sheng)(sheng)產水(shui)(shui)泵直接安裝在市政管(guan)網(wang)上。 為(wei)了解決(jue)供水(shui)(shui)設(she)備(bei)既可串(chuan)接在市政供水(shui)(shui)管(guan)網(wang)上又不產生(sheng)(sheng)負壓(ya)，更不影(ying)響(xiang)(xiang)其它用(yong)(yong)戶的用(yong)(yong)水(shui)(shui)，需要(yao)在水(shui)(shui)泵進口與市政管(guan)網(wang)之間增設(she)流(liu)量(liang)控(kong)(kong)制(zhi)器、分腔式穩壓(ya)補償罐(guan)等，流(liu)量(liang)控(kong)(kong)制(zhi)器時(shi)刻監視市政管(guan)網(wang)壓(ya)力(li)(li)，在保證市政管(guan)網(wang)不產生(sheng)(sheng)負壓(ya)的同時(shi)還可充(chong)分利用(yong)(yong)市政管(guan)網(wang)原有壓(ya)力(li)(li)。　　

當用(yong)戶用(yong)水(shui)需求(qiu)大于(yu)(yu)市政供給量(liang)時(shi)，采用(yong)分(fen)腔式穩壓補(bu)償罐(guan)(guan)，將罐(guan)(guan)內的水(shui)充(chong)分(fen)補(bu)充(chong)到用(yong)戶管網中(zhong)，直到用(yong)水(shui)趨于(yu)(yu)平穩時(shi)，再(zai)通過泵組及(ji)雙向補(bu)償裝置將分(fen)腔式穩壓補(bu)償罐(guan)(guan)的水(shui)補(bu)足，以備(bei)下一(yi)輪的高峰用(yong)水(shui)需求(qiu)。　　

整個過程都(dou)是在全密(mi)閉狀態下運行(xing)，且由變頻控制(zhi)系統(tong)控制(zhi)，無需人工手動調整，以(yi)保證(zheng)用戶的用水安全、純(chun)凈。　　

     無(wu)負壓(ya)(ya)(ya)(ya)供(gong)水(shui)(shui)(shui)(shui)設(she)備采(cai)用(yong)微機控(kong)(kong)制(zhi)變(bian)(bian)(bian)頻(pin)調速實(shi)現恒(heng)壓(ya)(ya)(ya)(ya)供(gong)水(shui)(shui)(shui)(shui)，其(qi)中(zhong)(zhong)的(de)(de)(de)(de)(de)負壓(ya)(ya)(ya)(ya)補償(chang)系統克(ke)服了對管(guan)(guan)網(wang)(wang)的(de)(de)(de)(de)(de)不良影(ying)響(xiang)無(wu)負壓(ya)(ya)(ya)(ya)供(gong)水(shui)(shui)(shui)(shui)設(she)備設(she)定(ding)某一壓(ya)(ya)(ya)(ya)力(li)(li)值(zhi)(zhi)。如果市(shi)政管(guan)(guan)網(wang)(wang)壓(ya)(ya)(ya)(ya)力(li)(li)高(gao)于(yu)設(she)定(ding)壓(ya)(ya)(ya)(ya)力(li)(li)值(zhi)(zhi)時(shi)(shi)，壓(ya)(ya)(ya)(ya)力(li)(li)變(bian)(bian)(bian)送器將該信(xin)號送到(dao)變(bian)(bian)(bian)頻(pin)控(kong)(kong)制(zhi)柜，使水(shui)(shui)(shui)(shui)泵(beng)機組處于(yu)休眠狀態。自(zi)(zi)來(lai)水(shui)(shui)(shui)(shui)則(ze)可通(tong)過(guo)(guo)連(lian)通(tong)管(guan)(guan)路直(zhi)接到(dao)達(da)用(yong)戶管(guan)(guan)網(wang)(wang)實(shi)施供(gong)水(shui)(shui)(shui)(shui)。當市(shi)政管(guan)(guan)網(wang)(wang)壓(ya)(ya)(ya)(ya)力(li)(li)下(xia)(xia)降或(huo)用(yong)戶管(guan)(guan)網(wang)(wang)用(yong)水(shui)(shui)(shui)(shui)量增加時(shi)(shi)，壓(ya)(ya)(ya)(ya)力(li)(li)傳感器將用(yong)戶管(guan)(guan)網(wang)(wang)壓(ya)(ya)(ya)(ya)力(li)(li)低于(yu)設(she)定(ding)值(zhi)(zhi)的(de)(de)(de)(de)(de)信(xin)號反饋給變(bian)(bian)(bian)頻(pin)控(kong)(kong)制(zhi)柜中(zhong)(zhong)的(de)(de)(de)(de)(de)PID控(kong)(kong)制(zhi)器，并通(tong)過(guo)(guo)其(qi)啟動(dong)水(shui)(shui)(shui)(shui)泵(beng)機組，調整變(bian)(bian)(bian)頻(pin)器的(de)(de)(de)(de)(de)輸出頻(pin)率，調節水(shui)(shui)(shui)(shui)泵(beng)轉速以(yi)保(bao)持恒(heng)壓(ya)(ya)(ya)(ya)供(gong)水(shui)(shui)(shui)(shui)；如果少數泵(beng)啟動(dong)尚不能滿(man)足(zu)供(gong)水(shui)(shui)(shui)(shui)要求時(shi)(shi)，變(bian)(bian)(bian)頻(pin)器將控(kong)(kong)制(zhi)多臺泵(beng)變(bian)(bian)(bian)頻(pin)或(huo)工頻(pin)運(yun)行(xing)，以(yi)達(da)到(dao)恒(heng)壓(ya)(ya)(ya)(ya)變(bian)(bian)(bian)量供(gong)水(shui)(shui)(shui)(shui)的(de)(de)(de)(de)(de)要求。當水(shui)(shui)(shui)(shui)泵(beng)機組的(de)(de)(de)(de)(de)供(gong)水(shui)(shui)(shui)(shui)與自(zi)(zi)來(lai)水(shui)(shui)(shui)(shui)管(guan)(guan)網(wang)(wang)的(de)(de)(de)(de)(de)進(jin)水(shui)(shui)(shui)(shui)保(bao)持平衡(heng)時(shi)(shi)，負壓(ya)(ya)(ya)(ya)消除器使穩(wen)壓(ya)(ya)(ya)(ya)補償(chang)器與外界(jie)隔離，水(shui)(shui)(shui)(shui)泵(beng)機組可利用(yong)自(zi)(zi)來(lai)水(shui)(shui)(shui)(shui)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)力(li)(li)進(jin)行(xing)恒(heng)壓(ya)(ya)(ya)(ya)供(gong)水(shui)(shui)(shui)(shui)。一旦(dan)平衡(heng)破壞，負壓(ya)(ya)(ya)(ya)消除器使穩(wen)壓(ya)(ya)(ya)(ya)補償(chang)器與外界(jie)相通(tong)，并通(tong)過(guo)(guo)穩(wen)壓(ya)(ya)(ya)(ya)補償(chang)器中(zhong)(zhong)的(de)(de)(de)(de)(de)檢測裝置(zhi)，采(cai)集穩(wen)壓(ya)(ya)(ya)(ya)補償(chang)器內的(de)(de)(de)(de)(de)真(zhen)空度及(ji)水(shui)(shui)(shui)(shui)位信(xin)號反饋給微機，通(tong)過(guo)(guo)微機控(kong)(kong)制(zhi)負壓(ya)(ya)(ya)(ya)消除器動(dong)作(zuo)，抑(yi)制(zhi)負壓(ya)(ya)(ya)(ya)產生，保(bao)證設(she)備在維(wei)持正常供(gong)水(shui)(shui)(shui)(shui)的(de)(de)(de)(de)(de)前提下(xia)(xia)不對城市(shi)管(guan)(guan)網(wang)(wang)產生任何負面影(ying)響(xiang)。

這種供水方式(shi)具有無可替代(dai)的(de)優越(yue)性：　

1、節省(sheng)投資無需建造水(shui)池，不用(yong)設水(shui)箱，占用(yong)空間小(xiao)。　

2、無(wu)二次污染，設備直(zhi)接與(yu)市政網連接，水質真(zhen)正不受(shou)二次污染，大大提高供(gong)水質量。　　

3、高效節能：

A、直接與市(shi)政管網(wang)連接可以(yi)充分利用市(shi)政管網(wang)壓力  

B、小(xiao)流(liu)量用水時可以不必頻繁啟停水泵。　

4、自動(dong)化運行；　　

5、節水(shui)效果好，全封閉運(yun)行(xing)，無滲漏，溢水(shui)現象

無負壓(ya)供(gong)水最好不要用在以下(xia):

1、用(yong)戶最大用(yong)水(shui)(shui)量大于(yu)自來水(shui)(shui)管網最小(xiao)進水(shui)(shui)量；

2、用戶用水非常集中，比(bi)如學校。坦(tan)白地說，該產品有(you)一定偽科(ke)學的(de)成分。