The definition of plug valve in standard GB/T21465 is: Plug valve is a valve whose opening and closing part is a plug body, which is driven by the valve stem and rotates around the axis of the valve stem. Plug valve opens and closes quickly. Like ball valve, the valve stem can be rotated about 90° to fully open or close the valve under normal circumstances. Plug valves are widely used in oilfield mining, transportation and refining equipment. They can also be widely used in petroleum, chemical, coal gas, natural gas, liquefied petroleum gas, HVAC industry and general industry.
