昌圖機械密封包括壓力控制、溫度控制、流體替換(堵塞)和雜質去除系統。在昌圖機械密封系(xi)(xi)統(tong)(tong)(tong)中，上述系(xi)(xi)統(tong)(tong)(tong)并不同時包(bao)括在內(nei)。密(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)的選擇主(zhu)(zhu)要取決于(yu)(yu)主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)件的應用(yong)(yong)范圍(wei)。例如(ru)，如(ru)果主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)用(yong)(yong)于(yu)(yu)高(gao)溫(wen)液體(ti)，密(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)應確(que)保(bao)(bao)降(jiang)低主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)的環境溫(wen)度，即采用(yong)(yong)溫(wen)度控(kong)制系(xi)(xi)統(tong)(tong)(tong)。如(ru)果主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)用(yong)(yong)于(yu)(yu)固(gu)體(ti)雜質(zhi)含(han)(han)量(liang)高(gao)的工作介質(zhi)，密(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)應確(que)保(bao)(bao)在主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)前降(jiang)低固(gu)體(ti)雜質(zhi)含(han)(han)量(liang)，即采用(yong)(yong)除雜系(xi)(xi)統(tong)(tong)(tong)。在腐蝕(shi)(shi)性介質(zhi)中，密(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)必須(xu)確(que)保(bao)(bao)主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)(feng)降(jiang)低腐蝕(shi)(shi)速率或消除腐蝕(shi)(shi)，即使用(yong)(yong)流體(ti)而不是堵(du)塞流體(ti)系(xi)(xi)統(tong)(tong)(tong)；在高(gao)壓密(mi)(mi)封(feng)(feng)(feng)(feng)裝置(zhi)中，輔助系(xi)(xi)統(tong)(tong)(tong)應確(que)保(bao)(bao)多級降(jiang)壓和其(qi)他措(cuo)施(shi)，即壓力控(kong)制系(xi)(xi)統(tong)(tong)(tong)。

　　昌圖機械密封的(de)三個主要功能如下(xia)：

　　1、沖洗功能，沖洗是昌圖機械密封基本的功能，它直接將液體注入單面密封或雙面密封的高壓側。一般的昌圖機械密封應該沖(chong)洗，特別是(shi)對于輕(qing)烴泵(beng)，沖(chong)洗時達到隔(ge)離(li)介(jie)質(zhi)、冷卻(que)和(he)改善(shan)潤滑的目的。隔(ge)離(li)介(jie)質(zhi)的目的可(ke)以通過將(jiang)與介(jie)質(zhi)相(xiang)容的液體引入密封腔進行外部(bu)循環沖(chong)洗來實現。

　　2、除雜和過濾功能，密封流體中的微細固體粒子、污垢等雜質對昌圖機械密封造(zao)成的(de)(de)危害非(fei)常嚴(yan)重，可(ke)能導(dao)致密(mi)(mi)封(feng)端(duan)面的(de)(de)磨損，也可(ke)能堵塞寒冷密(mi)(mi)封(feng)系統的(de)(de)管線。密(mi)(mi)封(feng)性系統軟件具有去除(chu)殘(can)渣(zha)、保持液體(ti)清潔的(de)(de)作用(yong)(yong)(yong)。當(dang)殘(can)渣(zha)的(de)(de)相對密(mi)(mi)度(du)小于液體(ti)媒質(zhi)相對密(mi)(mi)度(du)時，能用(yong)(yong)(yong)過濾裝置去除(chu)殘(can)渣(zha)；而當(dang)殘(can)渣(zha)的(de)(de)相對密(mi)(mi)度(du)超(chao)過液體(ti)媒質(zhi)相對密(mi)(mi)度(du)時，可(ke)選(xuan)用(yong)(yong)(yong)旋液分(fen)離設備或網式過濾器去除(chu)殘(can)渣(zha)。

　　3、流體替代功能，含有固體顆粒的氣相介質和液相介質的直接密封難度很大，它們溫、毒、貴、易蒸發、易結晶。借助昌圖機械密封可以用雙端昌圖機械密封代替密封(feng)(feng)介(jie)質(zhi)(zhi)，將難以直接密封(feng)(feng)的(de)介(jie)質(zhi)(zhi)轉化為(wei)密封(feng)(feng)潤滑(hua)性能好、清潔的(de)密封(feng)(feng)液體介(jie)質(zhi)(zhi)。