Rotary vane: Rotary vane pumps are made up of a series of vanes that are mounted to a rotor that turns inside a cavity. As the vanes rotate, centrifugal power Industrial Vacuum Pumps extends them from their individual slots, forming compression cells that get bigger to draw atmosphere in from the intake and smaller to drive air out the exhaust.
Articulated piston: An articulated piston commercial vacuum pump works in a way similar to that of an automobile engine. As the piston movements downward inside the 
cylinder, air is drawn in through the consumption valve. During the piston’s upward stroke, the air flow is permitted to escape via an exhaust valve. Two spring-backed piston bands are accustomed to seal the piston to the cylinder.
Screw: Rotary screw pumnps include two parallel rotary screws in the pump casing. The screws are synchronized to turn in opposing directions, which in turn causes the compression actions to occur. The gas is compressed in the direction of the pump’s discharge interface.
Liquid ring: Liquid ring pumps also operate via positive displacement. During procedure, the pump’s impeller rotates inside the pump casing. A rotating liquid ring then seals the impeller and its own blades. Liquid is sucked into the compression chamber to keep carefully the ring stable. Conveyed gas is compressed during each impeller revolution.
Claw: Claw vacuum pumps contain two rotors that are very close but usually do not are exposed to each other during rotation. As the rotors switch they physically enlarge the space between them to draw in air, then as they rotate around, physically reduce the space between them to compress the atmosphere out from the chamber.