The circular gate has a door frame, and the door frame should be made of steel plates that are cut on a shearing machine, folded on a bending machine, and assembled and welded on a dedicated workbench. The structure is sturdy and reasonable, able to withstand active loads, and the door frame ensures that it does not deform when subjected to the gravity and reaction force of the opening and closing machine.

Circular gates are mainly used for urban water supply and drainage, chemical flood control, water conservancy and other hydraulic structures, outlets, and for switching or intercepting water flow channels. It can be widely used in industries such as water treatment plants, sewage treatment plants, urban rainwater and sewage pump stations, water conservancy and flood control.

The manufacturing and processing of circular gates comply with the CJ/T300-1992 standard of the Ministry of Construction and the American AWWA standard. Widely used in municipal, petroleum, chemical, power station, metallurgy, coal, light industry, food, pharmaceutical, water conservancy, sewage treatment and other water supply and drainage projects. For pipelines with a nominal pressure below 0.1 MPa, stop the water flow and adjust the water level at the confluence well, sand and soil tank, sewage channel, original station well inlet, and clear water tank. It can be combined with manual, electric, and hydraulic switches to achieve on-site operation and remote centralized control, and can also be linked with a microcomputer for control. It is recommended to use copper containing cast iron circular gates composed of door frames, gate plates, guide rails, sealing strips, adjustable sealing mechanisms, and other components. Circular gates have the characteristics of simple structure, good sealing performance, strong wear resistance, easy operation, simple installation, long service life, consistent specifications, and wide applicability.