雙金屬片式疏水閥：
雙(shuang)金(jin)屬片(pian)(pian)疏(shu)水閥的(de)主要部件是雙(shuang)金(jin)屬片(pian)(pian)感溫(wen)元件，隨蒸汽溫(wen)度(du)(du)升降受(shou)熱變形，推動(dong)閥芯開關(guan)閥門(men)。雙(shuang)金(jin)屬片(pian)(pian)式疏(shu)水閥設有調整螺栓(shuan)，可(ke)根據需(xu)要調節(jie)使(shi)用溫(wen)度(du)(du)，一(yi)般過(guo)冷度(du)(du)調整范(fan)圍低于飽和(he)溫(wen)度(du)(du)15℃-30℃，背壓率(lv)大(da)于70%，能(neng)排不凝結氣體，不怕凍，體積小，能(neng)抗水擊，耐高壓，任(ren)意位(wei)置都可安裝。雙金(jin)屬片(pian)(pian)(pian)有疲勞性，需要經常調整。當(dang)裝置剛啟(qi)(qi)動時，管道(dao)出(chu)現低溫(wen)冷(leng)(leng)凝水，雙金(jin)屬片(pian)(pian)(pian)是平展的，閥芯(xin)在彈(dan)簧的彈(dan)力下，閥門處于(yu)開(kai)啟(qi)(qi)位(wei)置。當(dang)冷(leng)(leng)凝水溫(wen)度(du)漸漸升高，雙金(jin)屬片(pian)(pian)(pian)感(gan)溫(wen)起元件開(kai)始(shi)彎曲變(bian)形，并(bing)把閥芯(xin)推向關閉(bi)位(wei)置。在冷(leng)(leng)凝水達到飽和溫(wen)度(du)之前，疏水閥開(kai)始(shi)關閉(bi)。雙金(jin)屬片(pian)(pian)(pian)隨蒸汽溫(wen)度(du)變(bian)化控制閥門開(kai)關，阻汽排水。