Lined Valves Manufacturers

The lined fluoroplastic valves produced by our company are mainly made of PTFE, rptfe, FEP, PCTFE, PFA, PVDF and other fluoroplastics, or polyolefin materials Po, PE, PP and PVC are used as the lining materials to meet the needs of various working conditions and parameters. The fluorine lined valves are also called fluoroplastic lined corrosion-resistant valves. The fluorine lined valves are all lined where the medium in the valve body can reach, and can be applied to various concentrations of sulfuric acid, hydrochloric acid Hydrofluoric acid, aqua regia, various organic acids, strong acids, strong oxidizing agents and other corrosive media. However, the fluorine lined valves are greatly limited by temperature (only applicable to the medium between – 50 ° C and 150 ° C). The valves that can be lined with fluorine plastics include fluorine lined butterfly valves, fluorine lined ball valves, fluorine lined globe valves, fluorine lined diaphragm valves, fluorine lined gate valves and fluorine lined plug valves.

Fluorine lined valves, also known as fluoroplastic lined corrosion-resistant valves, are made of polytetrafluoroethylene resin (or profiles processed) by molding (or inlaying) on the inner wall of steel or iron valve pressure parts (the same method is applicable to the linings of various pressure vessels and pipeline accessories) or the outer surface of valve internals, and are made into various valves and pressure vessels by using their unique performance in anti-corrosive media.

Among the anti-corrosion materials, polytetrafluoroethylene has incomparable excellent performance. In addition to molten alkali metals, elemental fluorine and aromatic hydrocarbons, it reacts with each other in various concentrations of hydrochloric acid, sulfuric acid, nitric acid, aqua regia, organic acid, strong oxidant, alternating concentrated and dilute acid, alternating alkali and various organic solvents. The inner wall of the valve is lined with polytetrafluoroethylene, which overcomes the disadvantage of low strength of polytetrafluoroethylene materials, It also solves the problems of poor corrosion resistance and high cost of valve body materials. In addition, in addition to excellent chemical stability, polytetrafluoroethylene has good antifouling, anti stickiness, small and similar dynamic and static friction coefficient values, and good antifriction and lubrication performance. As the sealing pair of the valve opening and closing parts, it is necessary to reduce the friction force between the sealing surfaces, reduce the operating torque of the valve, and improve the service life of the product. Its application range can also be extended to the food and pharmaceutical industries

The lined fluoroplastic valves produced by our company are mainly made of PTFE, rptfe, FEP, PCTFE, PFA, PVDF and other fluoroplastics, or polyolefin materials Po, PE, PP and PVC are used as the lining materials to meet the needs of various working conditions and parameters. The fluorine lined valves are also called fluoroplastic lined corrosion-resistant valves. The fluorine lined valves are all lined where the medium in the valve body can reach, and can be applied to various concentrations of sulfuric acid, hydrochloric acid Hydrofluoric acid, aqua regia, various organic acids, strong acids, strong oxidizing agents and other corrosive media. However, the fluorine lined valves are greatly limited by temperature (only applicable to the medium between – 50 ° C and 150 ° C). The valves that can be lined with fluorine plastics include fluorine lined butterfly valves, fluorine lined ball valves, fluorine lined globe valves, fluorine lined diaphragm valves, fluorine lined gate valves and fluorine lined plug valves.

With the rapid development of modern industry, fluorine lined valves and various pipeline accessories have been rapidly applied and popularized in petroleum, printing and dyeing, chemical industry and other fields, showing strong vitality. As the preferred project in the project, it has attracted great attention and favor of engineering design units and construction units. It is a sunrise product with great market potential.

The fluorine lined valve has the dual functions of switch and flow regulation, which can easily open and close the gas circuit without affecting the flow, ensuring the repeatability of the flow. Slow opening reduces the impact of instantaneous pipeline pressure on the instrument. A damper is added to greatly prolong the service life of the fluorine lined valve. The fluorine lined valve is specially used to control corrosive or highly corrosive media. The inner surface of the valve body is covered with various fluoroplastics that can be selected. It is suitable for different working temperatures and fluid pipelines. It has the characteristics of high strength and good corrosion resistance.

Fluorine lined valves are of high price and harsh working conditions. They are either toxic and harmful chemicals or highly corrosive acid-base or organic solvents. Improper use will cause significant economic losses and serious consequences. Proper use and maintenance of the valve can prolong the service life of the fluorine lined valve, prevent various accidents, and ensure the normal operation of the pipeline. Therefore, the following points must be paid attention to in use:

1. Before use, carefully read the product manual.

2. Use according to the pressure, temperature and medium specified on the nameplate or the instruction manual.

3. During use, the fluorine lined valve shall be prevented from generating excessive pipe stress due to temperature change, and the temperature change shall be minimized. U-shaped expansion joints shall be added in front of and behind the valve.

4. It is forbidden to use lever to open and close the fluorine lined valve. Pay attention to observe the opening and closing indication position and limit device of the fluorine lined valve. After the opening and closing are in place, do not force the valve to close to avoid premature damage of the fluorine plastic sealing surface.

5. For some media that are unstable and easy to decompose (for example, the decomposition of some media will cause volume expansion and abnormal increase of working pressure) and cause valve damage or leakage, measures shall be taken to eliminate or limit the factors causing the decomposition of unstable media. When selecting the valve, the fluorine lined valve with automatic pressure relief device shall be selected in consideration of the possible working condition change caused by the unstable and easy decomposition of the medium.

6. For fluorine lined valves on toxic, flammable, explosive and highly corrosive medium pipelines, it is strictly prohibited to replace the packing under pressure. Although the fluorine lined valve is designed with an upper sealing function, it is not recommended to replace the packing under pressure.

7. For the pipeline with self igniting medium, measures shall be taken to ensure that the ambient temperature and working condition temperature shall not exceed the self igniting point of the medium, so as to prevent the danger caused by sunlight or external fire.

8. Measures shall be taken to eliminate the violent and long-term vibration of the pipeline to avoid the damage of fluoroplastic lined valves.

9. During the use of fluorine lined valves, the sealing surface of fluorine plastic is often damaged by medium crystallization and solid particles due to its soft texture, resulting in sealing leakage. Repair or replace the sealing parts in time after discovery.

10. Some fluorine lined valves are partially opened to regulate the flow during use. The high-speed medium leads to premature damage of the sealing surface. In this case, the sealing element shall be replaced in time.

11. Generally, the flange of fluorine lined valve is not provided with gasket. In case of leakage at the middle flange, evenly tighten the middle flange nut to eliminate the leakage. If the sealing surface of Sino French is damaged, repair the sealing surface and add the flange gasket to solve the problem.

12. If the handle or handwheel cannot rotate flexibly or the fluorine lined valve cannot be opened and closed, the gland nut can be loosened properly. The rotation is still not flexible. The gland may be skewed, and the gland should be adjusted. After adjusting and unscrewing the gland, the fluorine lined valve can not be opened and closed flexibly. It should be disassembled for inspection, dirt removal and troubleshooting. When disassembling this kind of fluorine lined valve, pay attention to what medium is in the pipeline of the fluorine lined valve, whether it is used or newly installed. If the medium used is toxic, inflammable and explosive, the staff shall wear protective mask and rubber gloves, and wear protective clothing to operate according to the operating procedures. Avoid accidents during