A rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In some cases these vanes can have variable length and/or be tensioned to maintain contact with the walls as the pump rotates.

What does a vane pump do?

A vane pump is a self-priming positive displacement pump providing constant flow at varying pressures. ... When the vanes reach the outlet of the pump the casing is flatter and tighter against the rotor causing the vane to be pushed into the rotor and the fluid to expel through the outlet of the pump.

What is a vane fuel pump?

Vane-Type Fuel Pumps

They are used as both engine-driven primary fuel pumps and as auxiliary or boost pumps. Regardless, the vane-type pump is a constant displacement pump that moves a constant volume of fuel with each revolution of the pump. When used as an auxiliary pump, an electric motor rotates the pump shaft.