For centralized grease lubrication systems, this is used to fill grease into the reservoir of an electric grease pump. The pump is of a type without a reservoir tank and is placed directly on a 200L oil drum. It can operate independently and, when connected to the corresponding electrical control unit, can automatically replenish the grease in the electric lubrication system. The pump is an internal gear plunger volumetric pump, utilizing worm gear reduction for smooth operation, high output pressure, and features a pressure-regulating safety valve at the outlet for overload protection.