High temperature lock valve is in a given variable rotary feeder on the basis of the process to adapt the system to block hot gas designed special rotary lock valve, the valve in addition to the features of the rotary feeder, but also priority in the high-temperature gas blocking function, the overall design of the body structure is compact, easy to maintain, and the rotor gap is adjustable, its main components are made of high-temperature low-alloy steel. Side mouth blown 0.1 ~ 0.3MPa air or (nitrogen) has greatly improved the working conditions of the body itself, the power valve formulated high-quality selection of imported Direct-coupled gear motor, its power is stable and reliable.