... input power. 2.Efficiency is higher Unloading pump Unloading pump can transfer medium that is from low viscosity ... .Such as:conveying sewage,waste oil,mud water,mining waste,waste fuel oil,lime white,washing liquid,emulsion ... from one side to another side along the pump shell.The cam rotor,driven by gear,rotates synchronously ... 6302600GMTB-1500-6504600GMTB-2000-61005600 Unloading Hydraulic Oil Pump