DP17蒸汽減(jian)(jian)(jian)壓閥(fa)是通過調(diao)節(jie)，將進(jin)口壓力減(jian)(jian)(jian)至某一需要的(de)出口壓力，并依(yi)靠(kao)介質本(ben)身的(de)能量(liang)，使(shi)出口壓力自動保(bao)持穩(wen)定(ding)的(de)閥(fa)門。從(cong)流體力學的(de)觀點看，減(jian)(jian)(jian)壓閥(fa)是一個局部阻力可以變化的(de)節(jie)流元件(jian)，即通過改變節(jie)流面積，使(shi)流速及流體的(de)動能改變，造成不同的(de)壓力損失，從(cong)而達到減(jian)(jian)(jian)壓的(de)目的(de)。然后(hou)依(yi)靠(kao)控(kong)制與調(diao)節(jie)系統的(de)調(diao)節(jie)，使(shi)閥(fa)后(hou)壓力的(de)波動與彈簧力相平(ping)衡，使(shi)閥(fa)后(hou)壓力在(zai)一定(ding)的(de)誤差范圍內保(bao)持恒定(ding)。　

DP17蒸汽減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)的(de)(de)(de)(de)(de)作用原理是靠閥(fa)(fa)(fa)內流道對水(shui)(shui)(shui)流的(de)(de)(de)(de)(de)局部阻(zu)力降低(di)水(shui)(shui)(shui)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)，水(shui)(shui)(shui)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)降的(de)(de)(de)(de)(de)范(fan)圍由連接閥(fa)(fa)(fa)瓣的(de)(de)(de)(de)(de)薄膜(mo)或(huo)活塞(sai)(sai)兩側的(de)(de)(de)(de)(de)進出口水(shui)(shui)(shui)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)差自動(dong)調節。近年來又(you)出現一(yi)(yi)些(xie)新型(xing)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)，如(ru)定(ding)比(bi)(bi)(bi)式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)。定(ding)比(bi)(bi)(bi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)原理是利用閥(fa)(fa)(fa)體中浮(fu)動(dong)活塞(sai)(sai)的(de)(de)(de)(de)(de)水(shui)(shui)(shui)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)比(bi)(bi)(bi)控制(zhi)，進出口端減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)比(bi)(bi)(bi)與進出口側活塞(sai)(sai)面積比(bi)(bi)(bi)成(cheng)反(fan)比(bi)(bi)(bi)。這種(zhong)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)工(gong)作平穩無(wu)(wu)振(zhen)動(dong)；閥(fa)(fa)(fa)體內無(wu)(wu)彈(dan)簧，故無(wu)(wu)彈(dan)簧銹(xiu)蝕、金屬疲勞失效之(zhi)慮；密(mi)封性能良好不滲漏，因而既減(jian)(jian)(jian)(jian)(jian)(jian)動(dong)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)（水(shui)(shui)(shui)流動(dong)時）又(you)減(jian)(jian)(jian)(jian)(jian)(jian)靜(jing)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)（流量(liang)為(wei)0時）；特別是在(zai)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)同(tong)時不影響水(shui)(shui)(shui)流量(liang)。水(shui)(shui)(shui)流通過減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)雖有很大(da)的(de)(de)(de)(de)(de)水(shui)(shui)(shui)頭損失，但由于(yu)減(jian)(jian)(jian)(jian)(jian)(jian)少了水(shui)(shui)(shui)的(de)(de)(de)(de)(de)浪(lang)費并使系(xi)統流量(liang)分布合理、改(gai)善了系(xi)統布局與工(gong)況(kuang)，因此(ci)總體上講仍是節能的(de)(de)(de)(de)(de)。斯派莎克DP17蒸汽減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)的(de)(de)(de)(de)(de)每一(yi)(yi)檔彈(dan)簧只在(zai)一(yi)(yi)定(ding)的(de)(de)(de)(de)(de)出口壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)力范(fan)圍內適(shi)用，超出范(fan)圍應更換彈(dan)簧。在(zai)介(jie)質(zhi)工(gong)作溫度比(bi)(bi)(bi)較高的(de)(de)(de)(de)(de)場合，一(yi)(yi)般(ban)(ban)選(xuan)用先導(dao)(dao)活塞(sai)(sai)式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)或(huo)先導(dao)(dao)波紋管式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)。介(jie)質(zhi)為(wei)空氣或(huo)水(shui)(shui)(shui)（液體）的(de)(de)(de)(de)(de)場合，一(yi)(yi)般(ban)(ban)宜(yi)選(xuan)用直接作用薄膜(mo)式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)或(huo)先導(dao)(dao)薄膜(mo)式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)。介(jie)質(zhi)為(wei)蒸汽的(de)(de)(de)(de)(de)場合，宜(yi)選(xuan)用先導(dao)(dao)活塞(sai)(sai)式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)或(huo)先導(dao)(dao)波紋管式(shi)(shi)(shi)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)。為(wei)了操作、調整和維修的(de)(de)(de)(de)(de)方便(bian)，斯派莎克DP17蒸汽減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)(ya)閥(fa)(fa)(fa)一(yi)(yi)般(ban)(ban)應安裝(zhuang)在(zai)水(shui)(shui)(shui)平管道上。

DP17蒸汽減壓閥的(de)具體參(can)數：

適用壓(ya)力：PN10-25

適(shi)用(yong)溫(wen)度：0-232°C

工程通徑：DN15-50mm