PTFE Teflon V-type combined packing is a high-performance sealing material, widely used in shaft motion sealing and rod sealing fields. Here is a detailed introduction to it:
1. Material Characteristics
1) Main Components: The material of PTFE Teflon V-type combined packing is based on polytetrafluoroethylene (PTFE). PTFE has excellent chemical stability, corrosion resistance, sealing property, high lubrication and non-stickiness, electrical insulation, and good resistance to aging and wear.
2) Temperature Range: PTFE Teflon V-type combined packing can work in a wide temperature range. Generally, it is suitable for environments below 230°C. For higher temperature applications, by filling carbon fibers, PPL, etc., to improve it, it can work well in the range of 200-300°C, and even at working temperatures above 350°C, PPL ortho-polyphenylene fillers or the addition of extended valve covers can be selected.
3) Corrosion Resistance: Except for molten sodium and liquid fluorine, PTFE Teflon V-type combined packing can withstand all chemical substances. It does not change even when boiled in aqua regia, thus being particularly suitable for strong corrosive environments in fields such as chemical and pharmaceutical industries.
4) Lubricity and Friction Coefficient: PTFE has an extremely low friction coefficient and good self-lubrication, which enables PTFE Teflon V-type combined packing to reduce wear during the sealing process and extend the service life.
2. Structure and Design
1) Combined Structure: PTFE Teflon V-type combined packing is usually composed of an upper packing cover ring, a middle V-shaped ring, and a lower support ring. This combined structure enables the packing to better adapt to the shape changes of the sealing surface under pressure, improving the sealing effect.
2) V-shaped Design: The V-shaped structure is available in 60° (for general occasions) and 90° (for high-pressure occasions). This design enables the packing to generate better radial force during sealing, closely contacting the valve stem to prevent medium leakage.
3) Manufacturing Precision: The tolerance of molded V-type packing is within 0.1mm, and the machining accuracy of V-shaped rings by CNC lathes can reach 0.02mm. The high precision of manufacturing ensures the sealing performance and reliability of the packing.
3. Application Fields
1) Chemical Machinery: In chemical enterprises, equipment such as reaction tanks often need to operate in high-temperature, high-pressure environments with corrosive media. PTFE Teflon V-type combined packing can effectively prevent medium leakage, ensuring production safety and stability.
2) Hydraulic and Pneumatic Equipment: In hydraulic and pneumatic systems, PTFE Teflon V-type combined packing can adapt to high-pressure environments, ensuring the sealing performance, reducing pressure loss, and improving the working efficiency of the equipment.
3) Other Fields: PTFE Teflon V-type combined packing is also widely used in petroleum, natural gas, pharmaceuticals, food processing, aerospace, and other fields to meet the sealing requirements of various harsh conditions.
4. Advantages and Characteristics
1) Good Recovery Toughness: PTFE Teflon V-type combined packing has good recovery toughness, able to quickly return to its original state after being subjected to pressure, maintaining the sealing performance.
2) Wear Resistance: By filling wear-resistant materials such as carbon fibers, the wear resistance of PTFE Teflon V-type combined packing is significantly improved, extending the service life.
3) Long Service Life: Compared with straight tube packing, the service life of PTFE Teflon V-type combined packing is more than five times longer, reducing the frequency and cost of replacing the packing. 4. Customized Services: Many suppliers offer customized services, enabling the production of PTFE four-fluorine V-type combined packing in various specifications and materials to meet the specific needs of customers and fulfill the special requirements of complex working conditions.
