1. The selection of water gate needs to consider its position, size, design head, application conditions, manufacturing capacity and installation technical level in hydraulic structures. It is required to achieve good water flow conditions, tight water stop, small opening and closing force, simple and flexible operation, convenient maintenance, etc;
2. Plane gate and radial gate are the most commonly used water gate types;
3. Among the service gates, radial gates are mostly used for large open top gates and high head DTH gates, and miter gates and transverse pull gates are mostly used on ship locks.