真空泵是指利用机械、物理、化学或物理化学的方法对被抽容器进行抽气而获得真空的器件或设备。通俗来讲，真空泵是用各种方法在某一封闭空间中改善、产生和维持真空的装置。
按真空泵的工作原理，真空泵基本上可以分为两种类型，即气体捕集泵和气体传输泵。其广泛用于冶金、化工、食品、电子镀膜等行业。
2BEA、2BVA、SZ、2S、2SK系列水环真空泵，除与罗茨泵或气冷泵组成2-4级罗茨水环或罗茨气冷水环机组外，亦可独立组成水环泵闭环或开环成套机组（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.
该机组可配套提供JZ系列油扩散喷射泵真空机组（又称油增压泵机组）。该机组抽气能力大、粗抽时间短、设备维护简单、操作方便，是真空应用设备的理想配套设备。但该机组不适于排除对金属有腐蚀作用及对泵油产生化学反应的气体。现广泛地被太阳能制品企业所应用。
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.
