桑珠孜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。在桑珠孜機械密封系(xi)(xi)統(tong)(tong)(tong)(tong)中(zhong)，上述系(xi)(xi)統(tong)(tong)(tong)(tong)并(bing)不同時包括在(zai)(zai)內。密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)的選擇主(zhu)要取決于主(zhu)密(mi)(mi)(mi)封(feng)(feng)件的應(ying)用范圍。例如(ru)，如(ru)果(guo)主(zhu)密(mi)(mi)(mi)封(feng)(feng)用于高(gao)溫(wen)液體，密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)(que)保降低(di)主(zhu)密(mi)(mi)(mi)封(feng)(feng)的環(huan)境溫(wen)度(du)，即(ji)(ji)采用溫(wen)度(du)控(kong)制(zhi)系(xi)(xi)統(tong)(tong)(tong)(tong)。如(ru)果(guo)主(zhu)密(mi)(mi)(mi)封(feng)(feng)用于固(gu)體雜質(zhi)含(han)量(liang)高(gao)的工作介(jie)質(zhi)，密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)(que)保在(zai)(zai)主(zhu)密(mi)(mi)(mi)封(feng)(feng)前(qian)降低(di)固(gu)體雜質(zhi)含(han)量(liang)，即(ji)(ji)采用除(chu)雜系(xi)(xi)統(tong)(tong)(tong)(tong)。在(zai)(zai)腐(fu)蝕(shi)性介(jie)質(zhi)中(zhong)，密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)必(bi)須確(que)(que)保主(zhu)密(mi)(mi)(mi)封(feng)(feng)降低(di)腐(fu)蝕(shi)速率或消(xiao)除(chu)腐(fu)蝕(shi)，即(ji)(ji)使用流體而不是堵塞流體系(xi)(xi)統(tong)(tong)(tong)(tong)；在(zai)(zai)高(gao)壓(ya)密(mi)(mi)(mi)封(feng)(feng)裝(zhuang)置中(zhong)，輔助系(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)(que)保多級降壓(ya)和其他(ta)措(cuo)施，即(ji)(ji)壓(ya)力控(kong)制(zhi)系(xi)(xi)統(tong)(tong)(tong)(tong)。

　　桑珠孜機械密封的(de)三個(ge)主要功能如下：

　　1、沖洗功能，沖洗是桑珠孜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。一般的桑珠孜機械密封應(ying)該沖(chong)洗(xi)，特別是對于輕烴泵，沖(chong)洗(xi)時達到(dao)隔離介質(zhi)、冷卻(que)和(he)改善(shan)潤滑的(de)(de)目(mu)的(de)(de)。隔離介質(zhi)的(de)(de)目(mu)的(de)(de)可以通過將與介質(zhi)相容的(de)(de)液體(ti)引入(ru)密封腔(qiang)進行外部循環(huan)沖(chong)洗(xi)來實現。

　　2、除雜和過濾功能，密封流體中的微細固體粒子、污垢等雜質對桑珠孜機械密封造成(cheng)的危害(hai)非常嚴重，可(ke)能(neng)導致(zhi)密封(feng)端面的磨損，也可(ke)能(neng)堵塞寒冷密封(feng)系(xi)統(tong)的管(guan)線。密封(feng)性系(xi)統(tong)軟件具有去除(chu)殘渣(zha)、保持液(ye)體清潔的作用。當(dang)殘渣(zha)的相(xiang)對密度(du)(du)小于液(ye)體媒質相(xiang)對密度(du)(du)時，能(neng)用過(guo)濾裝置去除(chu)殘渣(zha)；而當(dang)殘渣(zha)的相(xiang)對密度(du)(du)超(chao)過(guo)液(ye)體媒質相(xiang)對密度(du)(du)時，可(ke)選用旋液(ye)分離設備或(huo)網式過(guo)濾器去除(chu)殘渣(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。借助桑珠孜機械密封可以用雙端桑珠孜機械密封代替密封(feng)介質，將難(nan)以直接(jie)密封(feng)的介質轉化(hua)為密封(feng)潤滑(hua)性能好、清潔的密封(feng)液體介質。