EVV Series 3 – Lobe Roots Vacuum Pump

EV series 3-lobe roots compressors
EVV series 3-lobe roots vacuum pump

EV series 3-lobe roots compressors are researched and developed on a basis of RSS series. The biggest feature of this compressor is high rotation speed (the maximum can be 4000RPM), high capacity. With the breakthrough of technology and the modification of practical application, EV series compressors have higher efficiency, higher pressure, lower weight and other features. The inlet sizes are from 2.5”to 12”. The pressure of single compressor can be 1 Kgf/cm2

SKU: SBV73001 Category:

Technical specifications

Bore Size : Diameter  65mm to 300 mm (1 1/2″ ~ 12″)
Flow Rate : 0.36m3/min ~ 165.00m3/min (12.5 ~ 5,700.00 CFM)
Static Pressure : 1000- 10000 mmAq
Axial Power Consumption : 0.5 -300 KW


  • High Efficiency – Great linear structure, reduce sectional area of rotors to improve capacity of compressors.
  • Low Vibration – High grade of balance accuracy (G2.5) can control the vibration of X,Y, Z coordinate.
  • Low Loss of Pressure – 180 degrees vertical structure between inlet and outlet, reduce its pressure loss of compressors.
  • High Vacuum – The vacuum of single EV compressor can be -500mmHg, and the two-stage EV compressor can be -650mmHg.


Compressor Working Principle

Roots compressor is a cubage compressor, discharge airflow scale to the compressor’s speed. Every rotation, there is two lobes to finish three times absorbing and discharging air, compared with two lobes compressor, the air is more smooth, smaller load change, higher strength, lower noise and vibration.

Two parallel shafts have three lobes each, all the lobes keep small clearance with each and housing inside. Every lobes rotation, a certain air will be absorbed at inlet and transferred form the housing inside surface to compressor’s discharge port.

Two shafts will be turned by the timing gears, no any touching between lobes, so it can be turned at high speed without any lubrication inside. It has the following characteristics: simply configuration, running smoothly, and good performance stabilization. It has been applied for many fields.


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