What problems exist in the use of fluorine-lined butterfly valves?

by:Lianke Valve     2022-08-31
1. Since the multi-layer soft and hard laminated sealing ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a positive scouring on its sealing surface. 2. Restricted by structural conditions, the structure is not suitable for valves with a diameter below DN200, because the overall structure of the valve plate is too thick and the flow resistance is large. 3. Due to the principle of the fluorine-lined butterfly valve, the sealing between the sealing surface of the valve plate and the valve seat depends on the torque of the transmission device to press the valve plate against the valve seat. In the positive flow state, the higher the medium pressure, the tighter the sealing extrusion. When the medium in the flow channel flows back, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure as the medium pressure increases, and the seal begins to leak. The main advantages and characteristics of fluorine-lined butterfly valve The main advantages of fluorine-lined butterfly valve are simple structure, small volume, light weight, low cost, fully-lined fluorine-lined butterfly valve, this fully-lined fluorine-lined butterfly valve has particularly remarkable characteristics, it is installed in the high-altitude dark passage, and passes through the two-position five-way solenoid valve. The control operation is convenient, and the flow medium can also be adjusted. The fluid resistance is small, the effective flow area of ​​the medium and large-diameter pneumatic butterfly valves is large when they are fully opened, and the opening and closing is quick and labor-saving. Because the medium force of the disc wrench on both sides of the rotating shaft is close to the same, the torque generated is opposite, so the opening and closing torque is small, and a good seal can be achieved under low pressure. , lined with tetrafluoroethylene, so the sealing performance is good. The hard sealing butterfly valve is a soft and hard laminated metal sheet, which has the advantages of metal hard sealing and elastic sealing, and has excellent sealing performance regardless of low temperature conditions. With the application of chemical-resistant synthetic rubber on butterfly valves, full-lined fluorine butterfly valves, due to the strong corrosion resistance of PTFE (PTFE), stable performance, not easy to age, low friction coefficient, easy to form, dimensionally stable, and also By filling and adding appropriate materials to improve its comprehensive performance, a metal hard-sealed butterfly valve with better strength and lower friction coefficient can be obtained. Therefore, the polymer materials represented by polytetrafluoroethylene and its filling and modified materials have been widely used in the butterfly valve of the rear defense line, so that the performance of the butterfly valve has been further improved, and the temperature and pressure ranges have increased. A full-lined fluorine butterfly valve with wide sealing performance and longer service life. Fluorine-lined butterfly valve features: 1. Novel and reasonable design, unique structure, light weight, quick opening and closing. 2. Small operating torque, convenient operation, labor-saving and smart. 3. It can be installed in any position and easy to maintain. 4. The seals can be replaced, and the sealing performance is reliable to achieve zero leakage of bidirectional sealing. 5. The sealing material has the characteristics of aging resistance, corrosion resistance and long service life. Adopt standard
There is a strong need for more research on , in order to be able to provide strong and conclusive evidence of their types of industrial valves effects. However, recent studies have provided valuable insights into how the intake of may result in improved types of industrial valves.
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