PTFE Piston Seal

About PTFE Piston Seal

The function of PTFE piston seal is to use its excellent physical properties and chemical stability to seal during the piston movement of the engine. And it has excellent chemical corrosion resistance, high temperature resistance and low friction coefficient.

Sealing Principle

The sealing principle of PTFE piston seals is mainly based on the following factors:

1. Surface tension effect: The surface tension of the piston seal forms a closed liquid film, preventing the medium from directly contacting the sealing surface. This membrane effectively prevents media penetration and leakage.

2. Elastic deformation and recovery: PTFE piston seals have good elastic deformation ability and can automatically adjust shape and size when pressure and temperature change. When the sealing surface is affected by the pressure of the medium, it will deform to a certain extent and adhere closely to the sealing surface to prevent medium leakage. When the pressure is eliminated, it will gradually return to its original state and maintain good sealing performance.

3. Lubrication: PTFE has good lubrication properties and can form a protective film between friction surfaces to reduce friction and wear. The formation of this protective film can effectively reduce the friction coefficient between seals and improve the wear resistance and life of the seals.

4. Geometric design of the sealing surface: The geometric design of the sealing surface of the PTFE seal is also one of the important factors in its sealing performance. It is usually designed in geometric shapes such as cone, rectangle, trapezoid, etc. to increase sealing performance. These geometric designs can effectively reduce the possibility of media leakage and improve the reliability of seals.

Advantages

1. Corrosion resistance: PTFE material has excellent corrosion resistance and can resist the erosion of most chemicals, including acids, alkalis, salts and other organic solvents. Therefore, this kind of seals are widely used in various chemical reactors, pipes and containers.

2. High temperature resistance: PTFE piston seal can be used at high temperatures, and their long-term use temperature can reach 260°C. At high temperatures, its mechanical properties and chemical stability are very good.

3. Low temperature resistance: The piston seal can also be used at low temperatures, and its brittle temperature is lower than -180°C. At low temperatures, its mechanical strength and chemical stability are very good.

4. Low friction coefficient: The friction coefficient of the piston seal is very low, which can reduce the friction between the seal and the moving parts, thereby improving mechanical efficiency and service life.

5. Self-lubricating: Because the friction coefficient of PTFE seals is very low, they can slide without lubricant, thus reducing the frequency of maintenance and replacement of seals.

6. Good anti-aging properties: PTFE has good anti-aging properties and will not show obvious aging even after long-term use.

Application Scenarios

1. Chemical industry: In chemical production, PTFE piston seal can be used for sealing in various corrosive media and high-temperature environments, such as acids, alkalis, salts and other chemical substances and high-temperature steam.

2. Pharmaceutical industry: In pharmaceutical production, PTFE seals can be used for the transportation and sealing of various drugs, such as injections, tablets, solvents, etc., and their hygiene and safety have been widely recognized.

3. Food industry: In food production, piston seals can be used for packaging and sealing various foods, such as beverages, dairy products, meat, etc., and their hygiene and safety have been widely recognized.

4. Machinery industry: In machinery manufacturing, PTFE piston seal can be used for sealing various mechanical equipment, such as pumps, compressors, valves, etc. Its high temperature resistance, corrosion resistance and low friction coefficient can improve Equipment efficiency and reliability.

5. Automobile industry: In automobile manufacturing, piston seals can be used for sealing in engines, hydraulic systems and other parts, such as piston rings, oil seals, etc. Its high temperature resistance, corrosion resistance and low friction coefficient can improve the performance and performance of automobiles.

Daily Maintenance

1. Check whether the seal is worn or damaged: Regularly check the use of the PTFE piston seal to see if it is worn or damaged. If the seal is found to be worn or damaged, it should be replaced with a new one in time to ensure the sealing performance of the equipment.

2. Cleaning and cleaning: The piston seal needs to be kept clean and clean to prevent impurities and dirt from affecting its sealing performance. Clean and clean the seals regularly to remove impurities and dirt and ensure that their surfaces are smooth and clean.

3. Lubrication: PTFE piston seals require proper lubrication to reduce the friction coefficient, reduce wear and heat generation. Select the appropriate lubricant according to the equipment instruction manual or relevant specifications, and perform lubrication operations as required.

4. Installation and removal: When installing and removing the piston seal, it is necessary to operate in accordance with the equipment instruction manual or relevant specifications to avoid damage to the seal caused by excessive force or the use of inappropriate tools.

5. Storage and preservation: PTFE piston seals need to be properly stored and kept to avoid the effects of direct sunlight, high temperature, humidity and other adverse environmental conditions. The storage environment should be dry and well-ventilated, and the packaging should be kept intact to avoid contamination by dust and dirt.