Dry Screw Vacuum Pump is composed of a pair of screw rotors meshing in the opposite and synchronous way in the pump casing to form the suction and discharge operations.By using the maintenance-free technology,our screw vacuum pump has fewer problemsabout the difficulty and sealing liquid in the pump housing,screw vacuum pumps can be used to recycle many condensable gases.This featurecan solve the pollution and eco-issues of many vacuum systems such as the steam-jet pumps,slide valve pumps,rotary vane pumps and liquid ring pumps,meanwhilethe recycled materials can create additional economic benefits for clients.

Roots vacuum pump has a pair of tri-lobe rotors driven by a pair of high precision synchro-gears. The left figure illustrates one cycle of suction and discharge during 120 degrees. The tri-lobe rotors of involute profile rotate without contact and keep a constant gap in-between. It can be used with many fore pumps with air or water cooling mode and different sealing types in order to meet the various processing requirements and working conditions.

Due to this patented design, our Roots vacuum pump have obvious advantages over the traditional roots pumps of two-lobe rotors in the key performance indicators such as the pumping efficiency, maximum differential pressure, temperature rise, vibration and noise. High precision gears and rolling bearings ensure low noise and smooth operation of rotors, and it has relatively large pumping rate at low suction pressure.