The national standard flange ferrule plug valve is a valve that uses a plug body with a through hole as the opening and closing part, and the plug body rotates with the valve stem to realize the opening and closing action. The plug body is mostly conical, but there are also cylindrical ones. Simple structure, fast opening and closing, small flow resistance, convenient maintenance, good sealing performance and other characteristics. Drive mode: handle, worm gear drive, pneumatic, electric. Products are widely used in chemical, petroleum, textile, hydropower, food and pharmaceutical, pharmaceutical, pharmaceutical, papermaking and other industrial pipeline system control.