3D model of a butterfly valve with a lever handle. The main components of the valve are as follows:

Body: The valve body is colored blue and has a circular shape with two flanges for connection to a pipeline. The body houses the internal components of the valve.

Disc: The disc is located inside the valve body and appears to be made of a metallic material. It is the component that rotates to open or close the flow of fluid through the valve.

Seat: The seat is the sealing surface inside the valve body, typically made of a softer material like rubber, which ensures a tight seal when the disc is in the closed position. It appears as a brownish ring around the disc.

Lever Handle: The handle is attached to the top of the valve and extends horizontally. It is used to manually operate the valve by rotating the disc. The handle is in a metallic grey color.

Shaft: The shaft connects the lever handle to the disc and allows for the transfer of rotational motion from the handle to the disc.