Electro-hydraulic electric three-way sub-feeder into the feeder, pneumatic three sub-feeder, three downpipe, three flapper valves, outlined a three-way dosing valve. This product is used to switch to a different material conveyor. 2. This product meets the requirements for long-term continuous operation; starting, running and stopping the smooth and secure. 3. This product is designed and manufactured to meet the other issues can be safely under normal conditions, continuous operation, without undue stress, vibration, temperature, wear, corrosion and aging. 4. This product uses the dual-socket form the inner tube using a fan baffle structure for diversion of materials, plays smooth channel, good sealing performance, clogging effect. 5. The product according to the technical requirements in the chute (bezel) of stainless steel, achieve the purpose of long-term use. Baffles in prolonged use, such as after the wear performance is less than ideal, can be replaced. 6. This product uses the dual-sleeve fan structure, anti-seize large surface, leaving a large gap between the inner tube and the outer casing, liner catchy there, then the material will not fall into the shaft, the shaft and the housing would not have happened stuck phenomenon. 7. Electric three-way valve is the use of wear-resistant to electricity (liquid) push rod for actuating the source, the implementation of the commutation operation, with three-way electrical control baffles, to local operation also enables remote operation.