一、Features: 
1, the suction process is divided into two levels, and the first one is pumped by the air-cooled roots pump, and because of the air-cooled dry vacuum pump, the suction is not affected by the temperature of the season, and the suction efficiency is always above 85%.
2. The inlet pressure of the roots vacuum pump is 50Pa, which ensures that the roots vacuum pump group can better maintain and approach the theoretical vacuum value of the condenser than the water ring pump. Therefore more energy saving, effective energy saving under the same inlet pressure can reach more than 70%.
3. Small size, easier to arrange in renovation and new construction projects, and small floor space.
4. Under three conditions of non-excellent vacuum tightness units and low-load operation units in summer, this device has a higher vacuum value than the original vacuum pump, which makes the vacuum value of the condenser closer to the most economical limit value and reduces the coal consumption of power generation accordingly.
5. After the application of the device, the original vacuum pump is kept in the standby state for a long time without any maintenance plan which saves a lot of maintenance work and cost.
二、Model Description: 

For example: 2 BWZJQ - OEK4. 600-202

2BWZJQ-- high efficiency roots liquid ring vacuum package device code

600--- Model of efficient roots unit roots pump

202-- Model of vacuum pump for efficient roots unit

OEK4--- unit form code

三、Spectrogram: 
四、Application field: 
Power industry: condenser vacuum