琿春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。在琿春機械密封系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)中，上述系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)并不(bu)同(tong)時包括在(zai)(zai)內。密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)的(de)(de)選擇主(zhu)要取決于主(zhu)密(mi)(mi)封(feng)(feng)(feng)件的(de)(de)應用(yong)范圍。例如，如果主(zhu)密(mi)(mi)封(feng)(feng)(feng)用(yong)于高(gao)溫(wen)液體，密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)應確(que)保(bao)降低(di)主(zhu)密(mi)(mi)封(feng)(feng)(feng)的(de)(de)環境(jing)溫(wen)度(du)，即采用(yong)溫(wen)度(du)控(kong)制系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。如果主(zhu)密(mi)(mi)封(feng)(feng)(feng)用(yong)于固體雜質含量高(gao)的(de)(de)工作介(jie)質，密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)應確(que)保(bao)在(zai)(zai)主(zhu)密(mi)(mi)封(feng)(feng)(feng)前降低(di)固體雜質含量，即采用(yong)除雜系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。在(zai)(zai)腐(fu)蝕性介(jie)質中，密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)必須確(que)保(bao)主(zhu)密(mi)(mi)封(feng)(feng)(feng)降低(di)腐(fu)蝕速率或消除腐(fu)蝕，即使(shi)用(yong)流體而不(bu)是堵塞流體系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)；在(zai)(zai)高(gao)壓密(mi)(mi)封(feng)(feng)(feng)裝(zhuang)置中，輔助系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)應確(que)保(bao)多級降壓和其(qi)他措施，即壓力控(kong)制系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。

　　琿春機械密封的三個(ge)主(zhu)要(yao)功能如下：

　　1、沖洗功能，沖洗是琿春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。一般的琿春機械密封應(ying)該沖(chong)洗(xi)，特別是對于輕(qing)烴泵，沖(chong)洗(xi)時達到(dao)隔(ge)離介質、冷卻和(he)改善潤滑的(de)(de)目(mu)的(de)(de)。隔(ge)離介質的(de)(de)目(mu)的(de)(de)可以通(tong)過將與介質相(xiang)容的(de)(de)液體引入密封腔進(jin)行(xing)外部循(xun)環沖(chong)洗(xi)來(lai)實現。

　　2、除雜和過濾功能，密封流體中的微細固體粒子、污垢等雜質對琿春機械密封造成的危害非常嚴重，可(ke)能(neng)導致密(mi)(mi)封(feng)端(duan)面(mian)的磨損，也可(ke)能(neng)堵塞寒冷(leng)密(mi)(mi)封(feng)系統(tong)的管線。密(mi)(mi)封(feng)性系統(tong)軟件(jian)具有去(qu)除殘(can)(can)渣(zha)、保(bao)持液(ye)體(ti)清潔的作用。當(dang)(dang)殘(can)(can)渣(zha)的相(xiang)(xiang)對(dui)(dui)密(mi)(mi)度(du)小于(yu)液(ye)體(ti)媒質(zhi)相(xiang)(xiang)對(dui)(dui)密(mi)(mi)度(du)時(shi)，能(neng)用過(guo)濾(lv)裝置去(qu)除殘(can)(can)渣(zha)；而當(dang)(dang)殘(can)(can)渣(zha)的相(xiang)(xiang)對(dui)(dui)密(mi)(mi)度(du)超(chao)過(guo)液(ye)體(ti)媒質(zhi)相(xiang)(xiang)對(dui)(dui)密(mi)(mi)度(du)時(shi)，可(ke)選用旋液(ye)分離(li)設備或網式過(guo)濾(lv)器去(qu)除殘(can)(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。借助琿春機械密封可以用雙端琿春機械密封代替密封(feng)(feng)介(jie)質，將難以直接(jie)密封(feng)(feng)的介(jie)質轉化為密封(feng)(feng)潤滑(hua)性能(neng)好、清潔(jie)的密封(feng)(feng)液體介(jie)質。