Detailed introduction of fluorine lined valves!

    Detailed introduction of fluorine lined valves!

Introduction to Fluorine lined Valves
Polytetrafluoroethylene, commonly known as the "plastic king", was first introduced by DUPONTCO., LTD in 1938 in the United States
　　 Fluorine-lined ball valve
Developed and put into industrial production in 1949, fluorine lined valves have a history of 50 years from an industrial application perspective, PTFE lined valve And the time for its widespread application in the valve industry is not long. Fluorine lined valves use lining technology for all areas that can be reached by the medium inside the valve body. The lining material is generally made of fluoroplastics such as FEP (F46) and PCTFE (F3), which can be used for pipelines with various concentrations of sulfuric acid, hydrochloric acid, hydrofluoric acid, aqua regia, and various organic acids, strong acids, strong oxidants, and other corrosive media. However, fluorine lined valves are limited by temperature (only suitable for media between -50 ℃ and 150 ℃), Fluorine lined valve factory Valves that can be lined with fluoroplastics include: Fluorine-lined Butterfly Valve Fluorine lined ball valve, fluorine lined globe valve, fluorine lined diaphragm valve Fluorine lined gate valve Fluorine lined plug valves, etc.

Introduction to Polytetrafluoroethylene
Among corrosion-resistant materials, polytetrafluoroethylene (PTFE) has incomparable properties. In addition to molten alkali metals, elemental fluorine, and aromatic hydrocarbons, it exhibits random reactions in various concentrations of hydrochloric acid, sulfuric acid, nitric acid, aqua regia, organic acids, strong oxidants, alternating concentrated and dilute acids, alternating bases, and various organic solvents. By lining PTFE on the inner wall of valves, it overcomes the disadvantage of low strength of PTFE materials, Clamp type fluorine lined butterfly valve It also solves the shortcomings of poor corrosion resistance and high cost of valve body materials. In addition, polytetrafluoroethylene not only has chemical stability, but also has good anti fouling, anti viscosity, extremely small and similar dynamic and static friction coefficient values, and good anti friction and lubrication performance. When used as a sealing pair for valve opening and closing components, it is necessary to reduce the friction between the sealing surfaces, reduce the valve operating torque, and improve the product's service life. Its application range can also be extended to the food and pharmaceutical industries.

Main lining materials for fluorine lined valves
Suitable media for FEP (F46): any organic solvent or reagent, dilute or concentrated inorganic acid, base, ketone, aromatic hydrocarbon, chlorinated hydrocarbon, etc. Usage temperature: -85~150 Features: The mechanical, electrical, and chemical stability are basically the same as F4, but the outstanding advantages are high dynamic impact toughness, excellent weather resistance, and radiation resistance. Fluorine lined valve PCTEF (F3) Suitable media: various organic solvents, inorganic corrosive liquids (oxidizing acids) Operating temperature: -195~120 Characteristics: heat resistance, electrical performance, and chemical stability are second only to F4, mechanical strength, creep performance, and hardness are better than F4 Polypropylene: RPP Suitable media: aqueous solutions of inorganic salts, dilute or concentrated solutions of inorganic acids and alkalis. Usage temperature: -14~80. Characteristics: One of the lighter plastics, its yield, tensile and compressive strength, hardness are superior to low-pressure polyethylene, with outstanding rigidity, good heat resistance, easy molding, and excellent cost. Modified mobility, fluidity, and bending elasticity. Polyvinyl chloride: hard) PVC is suitable for media such as water resistance, concentrated alkali, non oxidizing acids, chain hydrocarbons, oil, and ozone. Service temperature: 0-55 Features: high mechanical strength, excellent chemical stability and dielectric properties, good oil resistance and anti-aging resistance, easy fusion and bonding, low price. Polytetrafluoroethylene PTFE (F4) is used in media such as strong acids, strong bases, and strong oxidants. Usage temperature: -200~180 Characteristics: It has chemical stability, high heat resistance, cold resistance, low friction coefficient, and is an excellent self-lubricating material. However, its mechanical properties are low, its flowability is poor, and its thermal expansion is large. Polyvinylidene chloride PVDF (F2) medium: resistant to most chemicals and solvents, operating temperature: -70~100. Features: better tensile and compressive strength than F4, bending resistance, weather resistance, and radiation resistance. It is resistant to light and aging, and its major characteristics are good toughness and easy molding. Polyolefin: Suitable media for PO: various concentrations of acid, alkali salts, and certain organic solvents. Usage temperature: -58~80. Characteristics: It is currently one of the most ideal anti-corrosion materials in the world and has been widely used for lining large equipment and pipeline components in rotary molding.

Application and Use of Fluorine lined Valves
With the rapid development of modern industry, fluorine lined valves and their various pipeline accessories have been rapidly applied and promoted in various fields such as petroleum, printing and dyeing, and chemical engineering, demonstrating strong vitality. As a project in engineering, it has attracted great attention and favor from various engineering design units and construction units, and is a sunrise product with market potential. Fluorine lined valves have dual functions of switching and flow regulation, which can easily open and close the gas path without affecting the flow rate, ensuring the repeatability of the flow. Fluorine lined DC globe valve Slowly opening reduces the impact of instantaneous pipeline pressure on the instrument. A damper has been added to greatly extend the service life of the needle valve. Fluorine lined valves are specifically designed to control corrosive or highly corrosive media. The surface of the valve body cavity is covered with various fluoroplastics for selection, suitable for different working temperatures and fluid pipelines. They have the characteristics of high strength and good corrosion resistance.

Characteristics of fluorine lined valves
Fluorine lined valve products include rubber lined globe valves, rubber lined ball valves, etc., and their manufacturing technology includes the formula and production process of adhesives. Adhesive can make the lining adhesive have strong affinity with the pipe wall, with good durability and anti scaling performance, and long service life. To ensure that the valve has both metal strength and corrosion resistance.

Classification of Fluorine lined Valves
Fluorine lined valves are divided into: pipe clamp valve, lining diaphragm valve, lining pneumatic butterfly valve, lining pneumatic ball valve, lining check valve, lining fluorine globe valve, lining plug valve, lining wedge gate valve, diaphragm valve, butterfly valve, ball valve, swing type, ball core check valve, pneumatic lining rubber, lining fluoroplastic diaphragm valve (normally closed), DC lining rubber diaphragm valve, packing type adjustable lining fluoroplastic butterfly valve, lining fluoroplastic globe valve, etc.

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