氣動隔膜泵密封的沖洗是控制溫度并延長壽命的較為有效措施。沖洗的目的是帶走熱量，降低密封腔的溫度，實際上是一種直接冷卻的方法，它包括正不銹鋼水箱向沖(chong)洗(xi)，反向沖(chong)洗(xi)，完全沖(chong)洗(xi)和全面沖(chong)洗(xi)。

1、正向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)當介質溫度在0-80°C時，正向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)是(shi)通(tong)常采用(yong)(yong)的(de)(de)沖(chong)洗(xi)(xi)(xi)(xi)(xi)冷卻，它(ta)是(shi)常用(yong)(yong)的(de)(de)方(fang)法(fa)，又分為(wei)自身(shen)沖(chong)洗(xi)(xi)(xi)(xi)(xi)型和(he)外部沖(chong)洗(xi)(xi)(xi)(xi)(xi)型兩種(zhong)。2、反向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)從密(mi)(mi)(mi)(mi)(mi)封腔(qiang)引(yin)出的(de)(de)密(mi)(mi)(mi)(mi)(mi)封介質返回(hui)泵(beng)(beng)內壓(ya)力(li)較低(di)處(通(tong)常是(shi)泵(beng)(beng)的(de)(de)人(ren)口(kou)處)，利(li)用(yong)(yong)密(mi)(mi)(mi)(mi)(mi)封介質自身(shen)循(xun)環(huan)沖(chong)洗(xi)(xi)(xi)(xi)(xi)密(mi)(mi)(mi)(mi)(mi)封腔(qiang)。這種(zhong)方(fang)法(fa)常用(yong)(yong)于(yu)密(mi)(mi)(mi)(mi)(mi)封壓(ya)力(li)與(yu)排出壓(ya)力(li)差極小(xiao)的(de)(de)場合。3、全沖(chong)洗(xi)(xi)(xi)(xi)(xi)從泵(beng)(beng)高壓(ya)側(泵(beng)(beng)出口(kou))引(yin)人(ren)密(mi)(mi)(mi)(mi)(mi)封介質，又從密(mi)(mi)(mi)(mi)(mi)封腔(qiang)引(yin)出介質返回(hui)泵(beng)(beng)的(de)(de)低(di)壓(ya)側進行(xing)循(xun)環(huan)沖(chong)洗(xi)(xi)(xi)(xi)(xi)。這種(zhong)沖(chong)洗(xi)(xi)(xi)(xi)(xi)也叫貫通(tong)沖(chong)洗(xi)(xi)(xi)(xi)(xi)。4、兩向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)對于(yu)雙支承泵(beng)(beng)可采用(yong)(yong)兩向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)，出口(kou)端(duan)密(mi)(mi)(mi)(mi)(mi)封腔(qiang)壓(ya)力(li)高于(yu)人(ren)口(kou)密(mi)(mi)(mi)(mi)(mi)封的(de)(de)壓(ya)力(li)將兩端(duan)密(mi)(mi)(mi)(mi)(mi)封腔(qiang)連(lian)接起來(lai)，對泵(beng)(beng)出口(kou)端(duan)是(shi)反向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)，泵(beng)(beng)的(de)(de)人(ren)口(kou)端(duan)是(shi)正向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)，故(gu)稱為(wei)兩向(xiang)(xiang)沖(chong)洗(xi)(xi)(xi)(xi)(xi)。