真空泵是指利用機械、物理、化學或物理化學的方法對被抽容器進行抽氣而獲得真空的器件或設備。通俗來講，真空泵是用各種方法在某一封閉空間中改善、產生和維持真空的裝置。

按真空泵的工作原理，真空泵基本上可以分為兩種類型，即氣體捕集泵和氣體傳輸泵。其廣泛用于冶金、化工、食品、電子鍍膜等行業。

2BEA、2BVA、SZ、2S、2SK系列水環真空泵，除與羅茨泵或氣冷泵組成2-4級羅茨水環或羅茨氣冷水環機組外，亦可獨立組成水環泵閉環或開環成套機組（含防爆型）。

Model 2BEA, 2BVA,SZ, 2S, 2SK water ring vacuum pump series could be assumed into 2-4 stages vacuum pump unit with roots vacuum pump or air cooled pump and also could be water ring closed-loop or open-loop unit (include the explosion-proof type) independently.

該機組可配套提供JZ系列油擴散噴射泵真空機組（又稱油增壓泵機組）。該機組抽氣能力大、粗抽時間短、設備維護簡單、操作方便，是真空應用設備的理想配套設備。但該機組不適于排除對金屬有腐蝕作用及對泵油產生化學反應的氣體。現廣泛地被太陽能制品企業所應用。

This unit comes with JK serial oil diffusion jet vacuum pump unit (also called oil booster unit).It has good capacity of gas extracting, with short rough extracting, easy to maintain and operating. It is ideal corollary equipment for vacuum application equipment.But this unit is not suitable for the gases which exclude corrosion towards metals and chemical reaction towards pump oil.Now it is widely applied by solar product enterprises.