Compensation type seal plug valve

The invention discloses a compensation type seal plug valve. The compensation type seal plug valve comprises a valve body, a valve cover and a valve rod. A valve cavity communicating with an inlet endand a discharging end is formed in the valve body, the end, in the valve cavity, of the valve rod is provided with a plug body, a bush is arranged between the plug body and the valve body, the crosssectional area of the end, away from the valve rod, of the plug body is smaller than that of the end, close to the valve rod, of the plug body, the end, away from the plug body, of the valve rod is inkey connection with a driving device capable of driving the valve rod to rotate, the end, outside the valve body, of the valve rod is provided with an adjusting pressing plate, one side of the adjusting pressing plate is provided with a first fastener in a penetrating manner, and one end of the first fastener is in threaded fit with the valve cover. The plug valve has the advantages that the plugvalve has the compensation