A rotary vane pump is a type of positive displacement pump that uses a rotating mechanism to move fluids. It consists of a rotor with several vanes that slide in and out of slots as the rotor turns. This action creates a series of chambers that trap and transport the fluid, making it efficient for various applications. These pumps are commonly used in industries such as automotive, HVAC, and chemical processing. They can handle a wide range of fluids, including oils and gases, and are known for their reliability and relatively low maintenance requirements.