Circular plug valves are often used in conjunction with unloading devices or silos, and are easy to install with flange connections. There are two types of inlet and outlet ports, square and circular, with dozens of specifications depending on the diameter. They are widely used in industries such as metallurgy, carbon, chemical, and building materials.

Circular plug valves, also known as circular plug valves, are commonly used below circular discharge ports. The direction of movement of the gate is perpendicular to the fluid direction, and circular plug valves can only be fully opened and fully closed, and cannot be adjusted or throttled. When the circular plug valve is closed, the sealing surface can be sealed solely by the medium pressure, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the medium pressure to ensure the sealing surface is sealed, which is called self sealing. Most knife type gate valves use forced sealing, which means that when the valve is closed, the gate must be forcefully pressed against the valve seat by external force to ensure the sealing surface is sealed.