Cast iron sluice gates are small flat gates widely used in water intake and conveyance, municipal construction, water supply and drainage, and agricultural irrigation projects. They are typically installed at the inlets of canals and culverts, serving as operating gates to regulate flow and control water levels, or as maintenance gates to close and prevent water from entering.

Wrought iron gates come in square and round shapes. Generally, wrought iron gates consist of two parts: the gate leaf and the frame. Both the gate body and frame are made of cast iron, usually cast and machined as a whole.

The door body typically features a panel and reinforced rib structure, with panels available in flat or arched designs. The door body is generally cast and machined as a whole, but for larger sizes, modular assembly may be used. A solid metal waterstop is commonly employed on the door body, serving as a support slider. The metal waterstop is securely fastened to the door body with countersunk screws made from the same material, with both the screw heads and the waterstop working surface precision machined. Larger sizes may also use "P" shaped rubber waterstops.

The door frame serves as the connecting component between the cast iron shutter gate and the foundation, equivalent to the buried height part of a flat steel shutter gate. It consists of two parts: the lower door frame and the upper guide rail. The lower door frame is generally cast and machined as a whole, while the guide rail can be connected to the door frame with bolts (screws) or cast as a unit with the lower door frame. When the door body is opened to a high position, the top of the guide rail should be above the horizontal centerline of the door body.