The main materials are non iron pots, hard woven filling and coating with ring tree grinding paint, rubber soft sealing, lightweight, flexible, anti-corrosion, rust free, easy to install and maintain, reliable sealing and other functions. It can be widely used in river water treatment plants, water treatment plants, wet, environmental protection, power, urban management, rivers and other projects. Used for cutting, adjusting flow rate, and controlling water level. According to regulations, the use of gates can be divided into: ("channel alarm gate" is used for the middle net of the channel. It is used for bulging flow and is generally used for three-way sealing; (2) "water control gate" is used for opening or closing the inlet and outlet of the waterway and is generally used for four-way sealing; (3) "sea gate" is used for regulating the flow of water; (4) "barrier gate" is used for adjusting the water level.