一、產品概述：
ZYC自力(li)式壓差控制閥是一種自動恒定壓差的(de)水(shui)(shui)力(li)工況平衡用(yong)閥，應用(yong)于(yu)集中拱熱、*空調等水(shui)(shui)系統(tong)中，有利于(yu)被(bei)控系統(tong)各用(yong)戶和末端裝(zhuang)置的(de)自主調節，尤其適用(yong)于(yu)分(fen)戶計量供暖(nuan)系統(tong)和變流(liu)量空調系統(tong)。
二、結構特點：
ZYC型自(zi)力(li)(li)式壓(ya)(ya)(ya)差(cha)控(kong)制(zhi)閥的(de)(de)(de)本體是由(you)能改變流(liu)(liu)通(tong)阻力(li)(li)的(de)(de)(de)雙通(tong)道自(zi)動(dong)調(diao)節(jie)閥和由(you)膜片分隔而成兩個獨立小(xiao)室(shi)的(de)(de)(de)控(kong)制(zhi)器(qi)(qi)組合而成，一(yi)側(ce)小(xiao)室(shi)與回水管道相通(tong)。使(shi)用(yong)(yong)時安裝在回水管道上。通(tong)道自(zi)動(dong)調(diao)節(jie)閥是執行器(qi)(qi)，其動(dong)作的(de)(de)(de)動(dong)力(li)(li)來源(yuan)于供水壓(ya)(ya)(ya)力(li)(li)P1與回水壓(ya)(ya)(ya)力(li)(li)P2之間的(de)(de)(de)壓(ya)(ya)(ya)力(li)(li)差(cha)變化。控(kong)制(zhi)器(qi)(qi)是一(yi)個壓(ya)(ya)(ya)差(cha)比較器(qi)(qi)，其壓(ya)(ya)(ya)差(cha)值是按被控(kong)采(cai)暖系統(tong)(tong)的(de)(de)(de)阻力(li)(li)選用(yong)(yong)，回水側(ce)內的(de)(de)(de)彈簧反力(li)(li)用(yong)(yong)來平衡(heng)供水與水間的(de)(de)(de)壓(ya)(ya)(ya)力(li)(li)差(cha)。當(dang)被控(kong)采(cai)暖系統(tong)(tong)的(de)(de)(de)一(yi)些用(yong)(yong)戶(hu)進行室(shi)溫調(diao)節(jie)，阻力(li)(li)增加或減少時，會引起循環流(liu)(liu)量變化，直至膜片兩側(ce)的(de)(de)(de)壓(ya)(ya)(ya)力(li)(li)平衡(heng)為(wei)止，使(shi)被控(kong)系統(tong)(tong)內部自(zi)動(dong)調(diao)節(jie)。