High temperature resistant plate valve

The utility model relates to a high temperature resistant plate valve, including valve body, disk seat, flashboard, valve rod, valve gap, the sealed face build -up welding carbide of valve seat seal face and flashboard, adopt the unsteady sealing device of metallic diaphragm between disk seat and the valve body, this metallic diaphragm floats sealing device by the metallic diaphragm, the diaphragm clamping ring, the retainer plate, leaf spring and leaf spring bracing ring are constituteed, anchor ring melting welding is on the disk seat radial step plane in the back in the metallic diaphragm, the outer anchor ring of metallic diaphragm seals up the pressure equipment in the radial step of the first passageway of valve body by diaphragm clamping ring and retainer plate, adopt screw -thread fit fixed connection between outer disc of retainer plate and the first passageway inner wall of valve body, installation leaf spring bracing ring and leaf spring between radial step plane in the disk seat back and the radial step of valve body second channel. Avoid the bloated dead and unsteady wearing and tearing phenomenon of high temperature, the high temperature working condition disk seat is unsteady in a flexible way, sealing performance is reliable, product long service life. Be applicable to the high temperature medium operating mode of trades such as oil, chemical industry.