SMC集裝式減壓閥產品特性一覽

減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)工作(zuo)(zuo)原(yuan)理和選(xuan)(xuan)用 減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)是通(tong)過改(gai)變節流(liu)面積，使(shi)流(liu)速及流(liu)體的(de)(de)(de)(de)(de)(de)(de)(de)動(dong)能改(gai)變，造成(cheng)不同的(de)(de)(de)(de)(de)(de)(de)(de)壓(ya)(ya)(ya)力(li)(li)損(sun)失，從而達到 減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)(de)(de)目的(de)(de)(de)(de)(de)(de)(de)(de),并依靠介(jie)(jie)質本身的(de)(de)(de)(de)(de)(de)(de)(de)能量控(kong)制與調節系統的(de)(de)(de)(de)(de)(de)(de)(de)調節，使(shi)閥(fa)(fa)(fa)(fa)后壓(ya)(ya)(ya)力(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de)波動(dong)與彈簧力(li)(li)相(xiang)平衡，使(shi)閥(fa)(fa)(fa)(fa)后壓(ya)(ya)(ya)力(li)(li)在定的(de)(de)(de)(de)(de)(de)(de)(de)誤差范(fan)圍內保持恒定的(de)(de)(de)(de)(de)(de)(de)(de)自(zi)動(dong)閥(fa)(fa)(fa)(fa)門(men)。 減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)選(xuan)(xuan)用原(yuan)則： 1.減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)進(jin)口(kou)壓(ya)(ya)(ya)力(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de)波動(dong)應(ying)控(kong)制在進(jin)口(kou)壓(ya)(ya)(ya)力(li)(li)給定值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de) 80％～105％，如(ru)超(chao)過該范(fan)圍，減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)(de)(de)(de)會受(shou) 影響。 2.通(tong)常減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)(de)(de)(de)閥(fa)(fa)(fa)(fa)后壓(ya)(ya)(ya)力(li)(li) Pc 應(ying)小(xiao)于閥(fa)(fa)(fa)(fa)前壓(ya)(ya)(ya)力(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de) 0.5 倍，即 Pc<0.5P1。 減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)(de)(de)(de)每檔彈簧只在定 的(de)(de)(de)(de)(de)(de)(de)(de)出口(kou)壓(ya)(ya)(ya)力(li)(li)范(fan)圍內適(shi)用，超(chao)出范(fan)圍應(ying)更換(huan)彈簧。 3.在介(jie)(jie)質工作(zuo)(zuo)溫度(du)比較高的(de)(de)(de)(de)(de)(de)(de)(de)場合，般選(xuan)(xuan)用導(dao)式(shi)(shi)活(huo)塞式(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)或(huo)導(dao)式(shi)(shi)波紋(wen)管(guan)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)。 4.介(jie)(jie)質為空氣或(huo)水（液體）的(de)(de)(de)(de)(de)(de)(de)(de)場合，般宜選(xuan)(xuan)用直(zhi)接作(zuo)(zuo)用薄膜式(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)或(huo)導(dao)式(shi)(shi)薄膜式(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)。 5.介(jie)(jie)質為蒸汽的(de)(de)(de)(de)(de)(de)(de)(de)場合，宜選(xuan)(xuan)用導(dao)活(huo)塞式(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)或(huo)導(dao)波紋(wen)管(guan)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)。 6.為了操作(zuo)(zuo)、調整和維修的(de)(de)(de)(de)(de)(de)(de)(de)方便，減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)般應(ying)安裝在水平管(guan)道上。 、減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)(de)(de)(de)工作(zuo)(zuo)原(yuan)理 減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)(de)(de)(de)工作(zuo)(zuo)原(yuan)理 直(zhi)動(dong)式(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa) 直(zhi)動(dong)式(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa) 圖 14—1a 所示為直(zhi)動(dong)式(shi)(shi)帶溢流(liu)閥(fa)(fa)(fa)(fa)的(de)(de)(de)(de)(de)(de)(de)(de)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)（簡稱溢流(liu)減(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)(fa)(fa)）的(de)(de)(de)(de)(de)(de)(de)(de)結構圖。

減(jian)壓閥(fa)是通過調(diao)節(jie)，將進口(kou)壓力(li)減(jian)至(zhi)某一需要的(de)(de)出(chu)(chu)口(kou)壓力(li)，并依靠介質本身的(de)(de)能量，使(shi)出(chu)(chu)口(kou)壓力(li)自動保(bao)持穩定(ding)的(de)(de)閥(fa)門(men)。從流(liu)(liu)(liu)體力(li)學的(de)(de)觀點看，減(jian)壓閥(fa)是一個(ge)局部阻(zu)力(li)可以(yi)變化的(de)(de)節(jie)流(liu)(liu)(liu)元件，即通過改(gai)變節(jie)流(liu)(liu)(liu)面積，使(shi)流(liu)(liu)(liu)速及流(liu)(liu)(liu)體的(de)(de)動能改(gai)變，造(zao)成不同的(de)(de)壓力(li)損(sun)失，從而達到減(jian)壓的(de)(de)目的(de)(de)。然后依靠控制與(yu)調(diao)節(jie)系統(tong)的(de)(de)調(diao)節(jie)，使(shi)閥(fa)后壓力(li)的(de)(de)波(bo)動與(yu)彈簧力(li)相(xiang)平衡，使(shi)閥(fa)后壓力(li)在(zai)一定(ding)的(de)(de)誤差(cha)范圍內保(bao)持恒定(ding)。

SMC集裝式減壓閥產品特性一覽