This valve is suitable to hot blast furnace system of large and medium-sized furnace. It is used as high temperature hot blast valve and back-flow valve, lined with fireproof material in the valve site, valve disc and valve cover. Medium: high temperature air,high temperature waste gas, etc. Temperature:≤1450 Nominal diameterDN5001800 Nominal pressure0.08-0.5MPa Driving mode:electric drive,hydraulic drive ,pneumatic drive