High temperature resistant non-return valve

The utility model discloses a novel high temperature resistance check valve, having a valve body; the valve body is provided with an air inlet port and an air outlet port, and a cavity is arranged inside the valve body; and the utility model is characterized in that: the circular valve is arranged at the opening of cavity inside the valve body at the air outlet port, the combined sealing working surface is arranged at the circular valve, and the easy dismountable valve cover is arranged on the valve body. The favorable effects of the utility model are: simple structure, ingenious design, good sealing, long performance life of valve plate, convenient replacement of valve elements.