The connection method of the fluorine-lined straight-through sight glass: flange; Application of fluorine-lined straight-through sight glass: used in important accessories in pipelines and equipment. It can be used in chemical towers with high temperature, strong corrosiveness, easy poisoning, high risk and easy crystallization to ensure its safe production. The working principle of the fluorine-lined straight-through sight glass: small installation size, small driving torque, easy and fast operation, and good flow adjustment function and closing sealing characteristics at the same time. , which is the dominant form of sight glass. Structural features of fluorine-lined straight-through sight glass: 1. It adopts J44W-220R DN15 high-pressure globe valve
form, conical surface seal, and PTFE packing seal. 2. The valve cover and the valve body are connected by bolts, which is convenient for disassembly and assembly. 3. The valve disc and the valve stem are integral structures, and the medium flow channel in the inner cavity of the valve body is unobstructed to prevent false liquid level. 4. Integral valve body, double valve stem structure, reasonable appearance layout. 5. The valve body can pass the heat preservation steam, which is used as a medium for heat preservation to prevent the liquid from crystallizing. 6. The valve body is welded with the tower container to increase the temperature of the valve body and prevent the liquid from crystallizing twice. Matters needing attention when installing and using: 1. Improve the material of the sight glass gasket. Use PTFE board with corrosion resistance, aging resistance and high temperature resistance. When installing, the sealing surface and gasket should be visually inspected, and there should be no defects such as radial grooves and scratches. The sealing gasket should be installed flat and in an accurate position. There should be no deflection or center offset, and the contact should be good to meet the requirements of use. 2. Strengthen the management of production process indicators. Strictly control the outlet temperature of the pre-distillation tower at 120℃, the pressure is 1.765MPa, the outlet temperature of the first suction tower is ≤46℃, and the pressure is 1.765MPa to prevent over-temperature and over-pressure.
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