Advantages And Disadvantages Of Fluorine-lined Valve Products, Advantages Of Fluorine-lined Valves

Advantages and disadvantages of Lined Valve products:

The following is a summary of the advantages and disadvantages of fluorine-lined valves by Shanghai Weidie Valve based on decades of valve experience:

1. The fluoroplastic-lined corrosion-resistant valves are also called fluorine-lined valves by molding (or inlaying) polytetrafluoroethylene resin (or processed profiles). Placed on the inner wall of the steel or iron valve pressure-bearing parts (the same method is applicable to the lining of various pressure vessels and pipeline accessories) or the valve internals, various valves and pressure vessels are made by using its unique performance in resisting strong corrosive media.

Industrial production in 1949 Polytetrafluoroethylene, commonly known as the "plastic king", was first developed and introduced by DUPONT CO., LTD in the United States in 1938. From the perspective of industrial application, it has a history of 50 years. However, it has not been widely used in the valve industry for a long time.

Polytetrafluoroethylene has incomparable excellent performance and is corrosion-resistant. In addition to molten alkali metals, elemental fluorine and aromatic hydrocarbons, various concentrations of hydrochloric acid, sulfuric acid, nitric acid, aqua regia, organic acids, strong oxidants, concentrated and dilute acid alternation, alkali alternation and various organic solvents all present polytetrafluoroethylene lining the inner wall of the valve, reacting randomly.

2. The disadvantage of low strength of ethylene material solves the problem that polytetrafluoroethylene, the main material of the valve, has poor corrosion resistance and high interest in addition to excellent chemical stability. In addition. It has good anti-fouling and anti-sticking properties, good dynamic friction reduction and lubrication properties, and the static friction coefficient value is extremely small and similar. Use it as a sealing pair for valve opening and closing parts to reduce the friction between the sealing surfaces, increase the service life of the product, and reduce the valve operating torque. Its scope of use can also be extended to food, chemical and pharmaceutical industries. Fluorine-lined valves and various pipeline accessories have been rapidly applied in various fields such as petroleum, printing and dyeing, and chemical industry. With the rapid development of modern industry. It shows strong vitality and promotion. As a project in the project, it has attracted great attention and favor from various engineering design units and construction units. It is a product with market potential.

3. The external dimensions are large, and a certain space is required for opening, and the opening and closing time is long; the structure is complex and not suitable for media with particles, high viscosity, and easy coking, and the adjustment performance is poor; it is easy to cause erosion and abrasion between the sealing surfaces, and it is difficult to repair.