The fluorine-lined valve is also called a fluorine plastic lined anti-corrosion valve. It is simply a valve that is suitable for a corrosive working environment. The fluororesin valve is manufactured by arranging the PTFE material on the valve inner wall of the valve or the inner surface of the valve inner part by means of molding or inlaying. The use of PTFE can resist the characteristics of the medium. Made of various types of valves.
Lining materials for fluorine-lined valves generally use fluorine plastics such as FEP (F46) and PCTFE (F3). The lining process is used to achieve the medium where the valve body can reach. It can be applied to various organic acids, strong acids, strong oxidants and other corrosion. In the medium pipeline, the fluorine-lined valve has good corrosion resistance and belongs to the soft butterfly valve in the butterfly valve. The disadvantage is that it is limited by the temperature, and it only applies to the working environment of -50°C to 150°C. in. If this temperature is exceeded, stainless steel can be used.
In the engineering pipeline, the most commonly used fluorine-lined valves are fluorine-lined and fluorine-filled. Both have excellent chemical stability, good corrosion resistance and sealing performance, and can be used for regulation and truncation. However, there is a difference in the use of the two. When do you use a fluorine-filled butterfly valve and when do you use a fluorine-filled ball valve?
(1) In the working condition where the pressure is less than or equal to 1.6MPa, the fluorine-firing butterfly valve and the fluorine-filled ball valve can be selected. There is not much difference between the two; when the pressure in the pipeline exceeds 1.6MPa, the fluorine-based butterfly valve is no longer applicable, only Fluorine ball valve can be used.
(2) The fluorine ball valve's pressure resistance and sealing performance are better than those of the fluorinated butterfly valve. Therefore, it is recommended to use the fluorinated ball valve in working conditions with high pressure difference and high sealing performance; under the condition of normal pressure, the fluorinated butterfly valve is used. can.
(3) The price of the ball valve is much higher than that of the butterfly valve. Therefore, it is more appropriate to make the large diameter of the fluorine-plated butterfly valve. In the normal pressure condition, the diameter requirement is greater than DN100, and the butterfly valve is selected.
(4) When used as a flow regulator, the Fluorine Butterfly valve is suitable for equal percentage adjustment of flow characteristics, and the Fluorine Ball valve is suitable for linear adjustment of flow characteristics.