(1)帶穩壓箱的羅茨真空泵:zhezhongluocibengdezhuanzixingxianyoucaiyongyuanhuxingde，youcaiyongjiankaixianxingde，yeyoucaiyongzuhexianxingde，qianmianyiyouxiangxixushu，zhelibuzaixushu，cibengyuganshiluocibengbutongdianshi:buyongqianjibengkezhipaidaqi，buyongqilengque，ershiyongshuilengque，zaibengkedechuqikoushangzhuangyouyigewenyaxiang，takeqixiaoshengwenyadezuoyong，shiyongqilaifeichangfangbian。
(2)帶有分離器、消聲器直排大氣的羅茨真空泵:這種羅茨真空泵的結構、工作原理和轉子型線與前麵所談的完全相同，它也是一種用水冷卻，帶前級泵而直排大氣的所謂濕式羅茨真空泵；不同之點僅在於在出氣口上不帶穩壓箱，而是在進氣口的管路上裝有氣水分離器，而在出氣口的管道上裝有分離、消聲器，以起到氣水分離和消聲的作用目前國外多采用此種裝置。
