德國費斯托FESTO過濾調壓閥操作模式
內部結構：
1、組合式減壓閥自動調節原理：
組合式減壓閥是種在復雜多變的工況下亦可利用水壓進行自我調節的減壓閥穩壓閥，在進口壓力和流量產生變化的時候保持出口的壓力和流量穩定。其*實現自力控制，調試簡單，運行可靠。
2、組合式減壓閥的雙反饋切換原理：
組合式減壓閥的反饋系統是根據減壓閥出口壓力的變化信號來控制過流面積（節流錐開度）的獨立系統。減壓閥裝備有互為備用的雙反饋系統，啟用A系統即停用B系統的運行模式可以達到減壓閥不停機檢修的目的。
減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)按結構(gou)形(xing)式(shi)(shi)(shi)(shi)可分(fen)為薄膜式(shi)(shi)(shi)(shi)、彈簧薄膜式(shi)(shi)(shi)(shi)、活塞式(shi)(shi)(shi)(shi)、杠桿(gan)式(shi)(shi)(shi)(shi)和波(bo)(bo)紋管式(shi)(shi)(shi)(shi)；按閥(fa)(fa)(fa)(fa)座數目可人為單座式(shi)(shi)(shi)(shi)和雙座式(shi)(shi)(shi)(shi)；按閥(fa)(fa)(fa)(fa)瓣的(de)(de)位置不同可分(fen)為正作(zuo)用(yong)(yong)式(shi)(shi)(shi)(shi)和反作(zuo)用(yong)(yong)式(shi)(shi)(shi)(shi)。導(dao)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)當減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)輸出(chu)壓(ya)(ya)(ya)(ya)(ya)力較(jiao)高或通(tong)徑較(jiao)大(da)時，用(yong)(yong)調壓(ya)(ya)(ya)(ya)(ya)彈簧直(zhi)接調壓(ya)(ya)(ya)(ya)(ya)，則(ze)彈簧剛度必然(ran)過大(da)，流量變(bian)化時，輸出(chu)壓(ya)(ya)(ya)(ya)(ya)力波(bo)(bo)動(dong)較(jiao)大(da)，閥(fa)(fa)(fa)(fa)的(de)(de)結構(gou)尺寸也將增大(da)。為了克(ke)服(fu)這些缺(que)點，可采用(yong)(yong)導(dao)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)。導(dao)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)工作(zuo)原理與(yu)直(zhi)動(dong)式(shi)(shi)(shi)(shi)的(de)(de)基本相同。導(dao)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)所用(yong)(yong)的(de)(de)調壓(ya)(ya)(ya)(ya)(ya)氣體，是由小(xiao)型(xing)的(de)(de)直(zhi)動(dong)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)供給的(de)(de)。若把小(xiao)型(xing)直(zhi)動(dong)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)裝在閥(fa)(fa)(fa)(fa)體內部(bu)，則(ze)稱(cheng)(cheng)為內部(bu)導(dao)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)；若將小(xiao)型(xing)直(zhi)動(dong)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)裝在主閥(fa)(fa)(fa)(fa)體外(wai)部(bu)，則(ze)稱(cheng)(cheng)為外(wai)部(bu)導(dao)式(shi)(shi)(shi)(shi)減(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)。

德國費斯托FESTO過濾調壓閥操作模式