Gear Pumps. Operating Principle: The external
gear pump is designed to
pump viscous and watery type fluids. The driven
gear is either attached to the
motor directly through a gearbox or magnetically. The driven
gear, within a tight tolerance body, rotates an idler
gear to complete the pumping process. The fluid passes around the outside of the gears, not between the driven and idler
gear teeth. In the direct drive and gearbox drive pumps, a carbon face/ceramic seal is used to contain fluids...
(read more)