Dry Rotary Vane
Vacuum pumps & Compressors
This type of pump is made up of a cylindrical body in which a rotor rotates eccentrically; the rotor has grooves into which the vanes are inserted. The vanes are free to slide along the grooves of the rotor, and the centrifugal force created during rotation pushes them into contact with the body, creating closed spaces that gradually increase the volume by bringing in air from the vessel to be emptied and expelling it through the exhaust pipe.
 If used as a compressor, the air drawn in from the environment is conveyed to the exhaust to be used. The rotary vane pump therefore operates according to the following principle: the operating volume of the pump increases from zero to maximum value by drawing in outside air. This volume is then isolated and then gradually reduced to push the air outward through the exhaust pipe.
Dry pumps may run continuously at both atmospheric pressure and maximum vacuum with no problem. On the contrary, they may not be used, unless with special filtration, when the intake air is damp or contains traces of oil or other liquids. Rotary compressors have the advantage of supplying air, at a certain pressure, with no pulsing and thus with no need for a buffer tank.
Popular areas of use for the vacuum pump include: suction cup conveyors, automatic packing or packaging machines, woodworking and other vacuum clamping applications, printing machines and associated finishing machines.
As compressors they may be used in water aeration and treatment systems, printing and packaging machinery, pneumatic conveying applications and low pressure painting systems.
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