延川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。在延川機械密封系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)中，上述系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)并不同時包括(kuo)在(zai)內。密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的選(xuan)擇主(zhu)要取決(jue)于(yu)主(zhu)密(mi)封(feng)(feng)件(jian)的應用(yong)范圍。例如，如果(guo)主(zhu)密(mi)封(feng)(feng)用(yong)于(yu)高(gao)溫(wen)液體(ti)，密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保(bao)(bao)降低(di)主(zhu)密(mi)封(feng)(feng)的環境溫(wen)度，即(ji)采(cai)用(yong)溫(wen)度控(kong)(kong)制系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。如果(guo)主(zhu)密(mi)封(feng)(feng)用(yong)于(yu)固體(ti)雜(za)(za)質(zhi)(zhi)含量高(gao)的工(gong)作介(jie)質(zhi)(zhi)，密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保(bao)(bao)在(zai)主(zhu)密(mi)封(feng)(feng)前降低(di)固體(ti)雜(za)(za)質(zhi)(zhi)含量，即(ji)采(cai)用(yong)除(chu)雜(za)(za)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。在(zai)腐(fu)蝕性介(jie)質(zhi)(zhi)中，密(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)必須(xu)確保(bao)(bao)主(zhu)密(mi)封(feng)(feng)降低(di)腐(fu)蝕速(su)率或消(xiao)除(chu)腐(fu)蝕，即(ji)使用(yong)流(liu)體(ti)而不是(shi)堵塞流(liu)體(ti)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)；在(zai)高(gao)壓(ya)密(mi)封(feng)(feng)裝(zhuang)置(zhi)中，輔(fu)助(zhu)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保(bao)(bao)多級降壓(ya)和其他措(cuo)施，即(ji)壓(ya)力(li)控(kong)(kong)制系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。

　　延川機械密封的(de)三個主要功能如(ru)下：

　　1、沖洗功能，沖洗是延川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。一般的延川機械密封應該沖(chong)洗(xi)(xi)，特別是對(dui)于輕烴(jing)泵，沖(chong)洗(xi)(xi)時達到隔離介(jie)(jie)質、冷卻和改善潤滑的(de)目(mu)(mu)的(de)。隔離介(jie)(jie)質的(de)目(mu)(mu)的(de)可以通過將(jiang)與(yu)介(jie)(jie)質相容的(de)液體引入密封腔進行外部循環沖(chong)洗(xi)(xi)來實(shi)現。

　　2、除雜和過濾功能，密封流體中的微細固體粒子、污垢等雜質對延川機械密封造成的(de)(de)(de)危(wei)害非常嚴重，可(ke)能導致(zhi)密(mi)封(feng)(feng)端面(mian)的(de)(de)(de)磨損(sun)，也可(ke)能堵塞寒(han)冷(leng)密(mi)封(feng)(feng)系(xi)統的(de)(de)(de)管(guan)線。密(mi)封(feng)(feng)性系(xi)統軟件具有去除殘渣(zha)、保持液(ye)(ye)體清潔(jie)的(de)(de)(de)作用(yong)。當殘渣(zha)的(de)(de)(de)相(xiang)(xiang)對(dui)(dui)密(mi)度小(xiao)于液(ye)(ye)體媒質相(xiang)(xiang)對(dui)(dui)密(mi)度時(shi)，能用(yong)過濾(lv)裝(zhuang)置去除殘渣(zha)；而當殘渣(zha)的(de)(de)(de)相(xiang)(xiang)對(dui)(dui)密(mi)度超過液(ye)(ye)體媒質相(xiang)(xiang)對(dui)(dui)密(mi)度時(shi)，可(ke)選用(yong)旋(xuan)液(ye)(ye)分離設備或網式過濾(lv)器去除殘渣(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。借助延川機械密封可以用雙端延川機械密封代替密封(feng)介質，將(jiang)難以直接(jie)密封(feng)的介質轉(zhuan)化為(wei)密封(feng)潤滑性能(neng)好、清(qing)潔的密封(feng)液(ye)體(ti)介質。