The sludge discharging three pass is mainly used for various pools of water supply companies, and can also be used to eliminate sediment or sewage at the bottom of the tank, and the three way of sludge discharge can be installed in the industrial medium of water, gas, oil and other industrial pipelines for intercepting purposes. The working principle and performance characteristics of mud mud three: three pass from the hydraulic cylinder and the balance angle type three way valve two parts, hydraulic cylinder as the power to drive the valve plate lifting, to open or close the valve channel, in order to achieve the fluid off the mud, three is the biggest characteristic such as the installation of a the two products in the middle of the pool with the same level of both sides at the same time can make the pool of mud, saving investment etc..