廣安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。在廣安機械密封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)中，上(shang)述(shu)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)并不(bu)同(tong)時包(bao)括在內。密(mi)(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的選擇主(zhu)(zhu)要(yao)取決于主(zhu)(zhu)密(mi)(mi)封(feng)件的應用(yong)(yong)范圍(wei)。例如，如果主(zhu)(zhu)密(mi)(mi)封(feng)用(yong)(yong)于高溫液(ye)體(ti)(ti)，密(mi)(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保(bao)降(jiang)(jiang)低(di)主(zhu)(zhu)密(mi)(mi)封(feng)的環(huan)境溫度，即采(cai)用(yong)(yong)溫度控制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。如果主(zhu)(zhu)密(mi)(mi)封(feng)用(yong)(yong)于固體(ti)(ti)雜質(zhi)(zhi)含(han)量高的工(gong)作介(jie)質(zhi)(zhi)，密(mi)(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保(bao)在主(zhu)(zhu)密(mi)(mi)封(feng)前(qian)降(jiang)(jiang)低(di)固體(ti)(ti)雜質(zhi)(zhi)含(han)量，即采(cai)用(yong)(yong)除(chu)雜系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。在腐蝕性介(jie)質(zhi)(zhi)中，密(mi)(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)必須(xu)確保(bao)主(zhu)(zhu)密(mi)(mi)封(feng)降(jiang)(jiang)低(di)腐蝕速率(lv)或消除(chu)腐蝕，即使用(yong)(yong)流(liu)體(ti)(ti)而不(bu)是堵塞流(liu)體(ti)(ti)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)；在高壓密(mi)(mi)封(feng)裝(zhuang)置(zhi)中，輔(fu)助系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保(bao)多(duo)級降(jiang)(jiang)壓和其(qi)他措(cuo)施，即壓力(li)控制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。

　　廣安機械密封的三個(ge)主要功能(neng)如下：

　　1、沖洗功能，沖洗是廣安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。一般的廣安機械密封應該沖(chong)洗，特別是對于輕烴(jing)泵，沖(chong)洗時達到隔離介(jie)質、冷卻和改善潤滑(hua)的(de)(de)目(mu)的(de)(de)。隔離介(jie)質的(de)(de)目(mu)的(de)(de)可以通(tong)過將與介(jie)質相(xiang)容的(de)(de)液體引入(ru)密(mi)封腔進行外(wai)部循環沖(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、污垢等雜質對廣安機械密封造成的(de)(de)危害(hai)非(fei)常(chang)嚴重，可(ke)能導致密(mi)封(feng)端面的(de)(de)磨損，也(ye)可(ke)能堵塞寒(han)冷(leng)密(mi)封(feng)系統(tong)的(de)(de)管線(xian)。密(mi)封(feng)性系統(tong)軟件具(ju)有去除殘(can)渣(zha)、保持液(ye)體清潔的(de)(de)作用。當殘(can)渣(zha)的(de)(de)相對(dui)(dui)(dui)密(mi)度小于液(ye)體媒(mei)質(zhi)相對(dui)(dui)(dui)密(mi)度時(shi)，能用過(guo)濾裝置(zhi)去除殘(can)渣(zha)；而當殘(can)渣(zha)的(de)(de)相對(dui)(dui)(dui)密(mi)度超過(guo)液(ye)體媒(mei)質(zhi)相對(dui)(dui)(dui)密(mi)度時(shi)，可(ke)選(xuan)用旋液(ye)分離設備或網(wang)式過(guo)濾器去除殘(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。借助廣安機械密封可以用雙端廣安機械密封代替密(mi)(mi)(mi)封介質，將難以(yi)直(zhi)接密(mi)(mi)(mi)封的(de)(de)介質轉化為密(mi)(mi)(mi)封潤(run)滑性能好、清潔的(de)(de)密(mi)(mi)(mi)封液體(ti)介質。