汶上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。在汶上機械密封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)中(zhong)(zhong)，上述系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)并不同(tong)時(shi)包括在內。密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)的(de)選擇主(zhu)(zhu)要取決于(yu)主(zhu)(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)件的(de)應(ying)用(yong)(yong)(yong)范圍(wei)。例如(ru)，如(ru)果主(zhu)(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)用(yong)(yong)(yong)于(yu)高溫(wen)液體(ti)，密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)應(ying)確保(bao)降(jiang)低(di)主(zhu)(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)的(de)環境溫(wen)度，即(ji)(ji)采(cai)用(yong)(yong)(yong)溫(wen)度控制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)。如(ru)果主(zhu)(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)用(yong)(yong)(yong)于(yu)固(gu)體(ti)雜(za)(za)質(zhi)含量高的(de)工作介(jie)質(zhi)，密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)應(ying)確保(bao)在主(zhu)(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)前降(jiang)低(di)固(gu)體(ti)雜(za)(za)質(zhi)含量，即(ji)(ji)采(cai)用(yong)(yong)(yong)除(chu)雜(za)(za)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)。在腐蝕性介(jie)質(zhi)中(zhong)(zhong)，密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)必須確保(bao)主(zhu)(zhu)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)降(jiang)低(di)腐蝕速率或消除(chu)腐蝕，即(ji)(ji)使用(yong)(yong)(yong)流體(ti)而不是堵塞流體(ti)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)；在高壓(ya)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)裝(zhuang)置中(zhong)(zhong)，輔助系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)應(ying)確保(bao)多級降(jiang)壓(ya)和其他措(cuo)施，即(ji)(ji)壓(ya)力控制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)(tong)(tong)。

　　汶上機械密封的三個主要功(gong)能如下：

　　1、沖洗功能，沖洗是汶上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。一般的汶上機械密封應該沖(chong)洗，特別是對于輕(qing)烴泵，沖(chong)洗時(shi)達到隔(ge)(ge)離介(jie)質、冷卻和(he)改善潤滑的目的。隔(ge)(ge)離介(jie)質的目的可以通(tong)過將與(yu)介(jie)質相(xiang)容的液體(ti)引入(ru)密封腔(qiang)進行外部循環沖(chong)洗來(lai)實(shi)現。

　　2、除雜和過濾功能，密封流體中的微細固體粒子、污垢等雜質對汶上機械密封造成的(de)危害非常嚴重，可(ke)能(neng)導致密(mi)(mi)封(feng)端面的(de)磨(mo)損，也(ye)可(ke)能(neng)堵塞寒(han)冷密(mi)(mi)封(feng)系統的(de)管線。密(mi)(mi)封(feng)性系統軟件具有去(qu)除殘(can)(can)渣、保持(chi)液體(ti)(ti)清(qing)潔(jie)的(de)作(zuo)用。當(dang)殘(can)(can)渣的(de)相(xiang)對(dui)密(mi)(mi)度小于液體(ti)(ti)媒(mei)質相(xiang)對(dui)密(mi)(mi)度時，能(neng)用過濾(lv)裝置(zhi)去(qu)除殘(can)(can)渣；而當(dang)殘(can)(can)渣的(de)相(xiang)對(dui)密(mi)(mi)度超(chao)過液體(ti)(ti)媒(mei)質相(xiang)對(dui)密(mi)(mi)度時，可(ke)選用旋液分離設備或網(wang)式過濾(lv)器(qi)去(qu)除殘(can)(can)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。借助汶上機械密封可以用雙端汶上機械密封代(dai)替密(mi)封介(jie)質，將難以直接密(mi)封的介(jie)質轉化為密(mi)封潤(run)滑性能(neng)好(hao)、清潔的密(mi)封液體(ti)介(jie)質。