Pneumatic high-temperature flue gas butterfly valve

1 RTOsuperPneumatic high-temperature flue gas butterfly valveProduct Introduction

DG641W-1PPneumatic high-temperature flue gas butterfly valveIt is a specially designed high-temperature regulating control valve with a reasonable product structure design, easy operation, and reliable use. The operation can be done using worm gears, electric motors, and pneumatic motors to meet the needs of program control and remote control. The product is widely used in high-temperature auxiliary lines of sulfur based sulfuric acid production, as well as in blast furnace air distribution and boiler pipelines as control and regulating valves in smelting and petrochemical systems. Characterized in that the valve seat sealing ring is composed of multiple layers of stainless steel sheets on both sides of a soft T-shaped sealing ring. The sealing surface between the valve plate and the valve seat is a slanted cone structure, and a heat-resistant and corrosion-resistant alloy material is welded on the slanted cone surface of the valve plate; The structure in which the spring fixed between the adjusting ring pressure plate and the adjusting bolt on the pressure plate are assembled together. This structure effectively compensates for the tolerance zone between the shaft sleeve and the valve body, as well as the elastic deformation of the valve stem under medium pressure, solving the sealing problem of the valve in the bi-directional exchange of medium transportation process. The sealing ring is composed of multiple layers of stainless steel sheets on both sides of a soft T-shaped structure, which has the dual advantages of metal hard sealing and soft sealing. It has zero leakage sealing performance in both low and high temperature conditions. The experiment proves that when the pool is in a positive flow state (the direction of medium flow is the same as the direction of butterfly plate rotation), the pressure on the sealing surface is generated by the torque of the transmission device and the effect of medium pressure on the valve plate. The tighter the compression between the inclined conical surface of the valve plate and the sealing surface of the valve seat when the positive medium pressure increases, the better the sealing effect. When in reverse flow state, the seal between the valve plate and the valve seat is pressed against the valve seat by the torque of the driving device. As the reverse medium pressure increases, when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the deformation energy stored by the spring of the regulating ring after being loaded compensates for the tight pressure on the sealing surface between the valve plate and the valve seat, playing an automatic compensation role. Therefore, unlike existing technologies that install soft and hard multi-layer sealing rings on the valve plate, this utility model directly installs them on the valve body, and adding an adjusting ring between the pressure plate and the valve seat is an ideal bidirectional hard sealing method. Untreated emissions of flue gas from metal smelting and various furnaces have been explicitly prohibited. This kind of disorderly emission not only exacerbates air pollution, but also causes energy waste. The technology of utilizing waste heat from high-temperature flue gas has been widely promoted. This places high demands on the system equipment. To adapt to this situation, a new type of ultra-high temperature flue gas butterfly valve has been developed to improve and enhance utilization efficiency. Due to the selection of suitable high-temperature resistant materials and structural forms, the ultra-high temperature butterfly valve can be used at temperatures up to 900 ℃ under low pressure differentials. Replacing the traditional internal circulation water cooling structure and outdated structure lined with fire-resistant mud; This series of ultra-high temperature butterfly valves has the characteristics of simple structure, easy operation, large diameter, and light weight. The valve body is equipped with a split valve seat structure, ensuring minimal leakage. It can be widely used in sulfur based sulfuric acid production, metallurgy, and petrochemical systems for blast furnace air distribution and boiler pipelines to regulate and control fluids; You can choose a worm gear transmission mechanism to meet the requirements of process control.