https://www.wsv-valve.com/classification-and-advantages-of-plug-valves.html Classification and Plug Valve Advantages Ⅰ. Introduction of plug valves Plug valve is a quick opening and closing through the valve. Because the movement between the rotary sealing surfaces has the function of wiping, it can completely prevent contact with the flowing medium when fully opened, so it can also be used for the medium with suspended particles. Another important feature is that it is easy to adapt to multi-channel structure, so that one valve can obtain two, three or even four different flow channels. This can simplify the design of the piping system, reduce the consumption of valves and some connecting accessories required in the equipment.