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Description

Vane pump is a particular type of positive displacement pump. Its principle of operation is to use the back and forth movement of rectangle shaped vanes inside slots to move fluids. They are sometimes also referred to as sliding vane pumps.

Working Principle

The simplest vane pump consists of a circular rotor rotating inside of a larger circular cavity. The center’s of the two circles are offset, causing eccentricity. Vanes are allowed to slide into and out of the rotor and seal on all edges, creating vane chambers that do the pumping work. On the intake side of the pump, the vane chambers are increasing in volume. These increasing volume vane chambers are filled with fluid forced in by the inlet pressure. Inlet pressure is actually the pressure from the system being pumped, often just the atmosphere. On the discharge side of the pump, the vane chambers are decreasing in volume, forcing fluid out of the pump. The action of the vane drives out the same volume of fluid with each rotation.