羅茨水環真空泵機組作為前泵比其他真空泵更有利，克服了單水環泵的極限壓差（機組的極限壓力大于水環泵）。在一定的壓力下，羅茨泵可以快速工作，具有較大的高優勢。特別是，它可以適應去除大量的冷凝蒸汽，特別是當氣體鎮油密封機械真空泵不足以去除冷凝蒸汽時，或使用的溶劑會惡化泵油，影響性能，或真空系統不允許油污染。配備防爆電機和電器，并遵守相應的安全規則。因此，羅茨泵水環真空泵機組廣泛應用于真空蒸餾、真空蒸發、脫水結晶、食品工業冷凍干燥、制藥工業真空干燥、紡織工業聚酯板、高空模擬試驗等真空系統。
用于高真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)的(de)(de)羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（機械增壓(ya)泵(beng)(beng)(beng)）不能(neng)直接(jie)排放(fang)大(da)氣。例如，直接(jie)排氣會導致羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)吸入(ru)口與排氣口之(zhi)間(jian)的(de)(de)壓(ya)差過大(da)，導致羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)過載。例如，僅僅增加羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)的(de)(de)電機功(gong)率就會導致羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)過熱。因此(ci)，由于熱膨(peng)脹，羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)轉子(zi)(zi)之(zhi)間(jian)的(de)(de)小間(jian)隙很(hen)快就會卡住。為了確(que)保羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)能(neng)夠達到更(geng)高的(de)(de)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)度，有必要確(que)保羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)轉子(zi)(zi)之(zhi)間(jian)的(de)(de)間(jian)隙。因此(ci)，羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)在啟動羅茨(ci)(ci)真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)之(zhi)前必須配備前泵(beng)(beng)(beng)。前泵(beng)(beng)(beng)可選(xuan)用水（液）環真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、旋片真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、滑閥真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、往復式真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)等真空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)。
一(yi)般來說，羅茨真(zhen)(zhen)空(kong)機組使用水環泵(beng)作為前(qian)泵(beng)比其他真(zhen)(zhen)空(kong)泵(beng)更有利(li)。這主要是因為它可以去除大量的冷凝蒸汽(qi)，特別是當氣體鎮油(you)密封機械真(zhen)(zhen)空(kong)泵(beng)沒有足(zu)夠的冷凝蒸汽(qi)能力，或使用的溶(rong)劑可以惡化(hua)泵(beng)油(you)，影響性能，或者當真(zhen)(zhen)空(kong)系(xi)統不允許油(you)污時(shi)，情況更加明顯。
