措美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。在措美機械密封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)中(zhong)(zhong)，上述系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)并不(bu)同時包(bao)括在(zai)內。密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的(de)選擇主(zhu)(zhu)(zhu)要(yao)取決于主(zhu)(zhu)(zhu)密(mi)封(feng)(feng)件(jian)的(de)應(ying)用(yong)范圍。例如(ru)，如(ru)果主(zhu)(zhu)(zhu)密(mi)封(feng)(feng)用(yong)于高溫(wen)(wen)液體(ti)，密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確保(bao)(bao)降(jiang)低(di)主(zhu)(zhu)(zhu)密(mi)封(feng)(feng)的(de)環境溫(wen)(wen)度，即(ji)(ji)采用(yong)溫(wen)(wen)度控制(zhi)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。如(ru)果主(zhu)(zhu)(zhu)密(mi)封(feng)(feng)用(yong)于固體(ti)雜(za)質(zhi)(zhi)含量(liang)高的(de)工作介質(zhi)(zhi)，密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確保(bao)(bao)在(zai)主(zhu)(zhu)(zhu)密(mi)封(feng)(feng)前(qian)降(jiang)低(di)固體(ti)雜(za)質(zhi)(zhi)含量(liang)，即(ji)(ji)采用(yong)除雜(za)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。在(zai)腐蝕性介質(zhi)(zhi)中(zhong)(zhong)，密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)必須(xu)確保(bao)(bao)主(zhu)(zhu)(zhu)密(mi)封(feng)(feng)降(jiang)低(di)腐蝕速率或消除腐蝕，即(ji)(ji)使用(yong)流(liu)體(ti)而不(bu)是堵塞(sai)流(liu)體(ti)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)；在(zai)高壓(ya)密(mi)封(feng)(feng)裝置中(zhong)(zhong)，輔(fu)助系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確保(bao)(bao)多級(ji)降(jiang)壓(ya)和(he)其他措施，即(ji)(ji)壓(ya)力控制(zhi)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。

　　措美機械密封的三個主要功能如下：

　　1、沖洗功能，沖洗是措美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。一般的措美機械密封應該沖洗，特別是對于(yu)輕烴(jing)泵，沖洗時達(da)到隔(ge)離介(jie)質(zhi)、冷卻和(he)改善(shan)潤滑的(de)目的(de)。隔(ge)離介(jie)質(zhi)的(de)目的(de)可以通過將與介(jie)質(zhi)相容(rong)的(de)液體引入密封(feng)腔進行外部(bu)循環沖洗來實現。

　　2、除雜和過濾功能，密封流體中的微細固體粒子、污垢等雜質對措美機械密封造成的(de)危害非常嚴重(zhong)，可能(neng)導(dao)致密封端面(mian)的(de)磨損，也(ye)可能(neng)堵塞(sai)寒冷密封系統的(de)管(guan)線(xian)。密封性系統軟(ruan)件具有(you)去除殘渣、保持液體(ti)清潔的(de)作用。當(dang)(dang)殘渣的(de)相(xiang)對(dui)密度小于(yu)液體(ti)媒質相(xiang)對(dui)密度時，能(neng)用過濾裝置去除殘渣；而當(dang)(dang)殘渣的(de)相(xiang)對(dui)密度超(chao)過液體(ti)媒質相(xiang)對(dui)密度時，可選(xuan)用旋液分離設(she)備(bei)或網式過濾器(qi)去除殘渣。

　　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。借助措美機械密封可以用雙端措美機械密封代替密(mi)封介質(zhi)，將難(nan)以直(zhi)接密(mi)封的介質(zhi)轉化為密(mi)封潤滑性(xing)能好、清(qing)潔的密(mi)封液體介質(zhi)。