Slurry Valve mainly adopts the wafer type structure, small volume and light weight; fully opened duct, preventing medium from depositing in the valve; latest developed U-shape washer, ensuring an excellent air-tightness of the valve; the external sealing of the slide plate is achieved by using the elastic sealing rod embedded in the valve body and may be regulated via the screw and the pressure plate; low flow resistance; convenient for mounting and servicing.