1,be able to bear high temperature 2,good cooled effected 3,Minimum temperature loss 4,Low operating costs 5,used to furnace The valve is widely used in building material, mining, power, glass, light industries etc. It is applied in hot windpipe system of smoke, waste gas management and in boiler, stove, and blast furnace of recycles heat. It is the ideal equipment to save energy and switch high ...