Wheel Lug Type Middle Line Butterfly Valve 

     The lug type butterfly valve is a type of valve that is used to control the flow of fluid in a pipeline. It is designed with a disc that rotates on a central axis to control the flow of fluid through the valve. The disc is connected to a worm wheel, which is operated by a worm gear mechanism.      The lug type refers to the method of installation of the valve. It has lugs or ears on the valve body that allow for easy installation and removal from the pipeline. The valve is held in place by bolts that are inserted through the lugs and secured with nuts.The wafer type butterfly valve design of the valve means that it is designed to fit between two flanges in the pipeline. It does not have a flange body itself, but instead, it is sandwiched between the flanges and held in place with bolts.      The worm wheel mechanism of the manual valve allows for precise control of the flow of fluid. By turning the worm wheel, the disc…