Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of ptfe filled carbon gaskets in China, also supports customized service. Please feel free to buy high quality ptfe filled carbon gaskets for sale here from our factory.
Description of PTFE Filled Carbon Gaskets
Structure and materials
| PTFE Carbon Data Sheet Refers | ||||||
| Properties | Condition | Standard | Unit | Unit | ||
| Color | Black | Black | ||||
| Density/specifc gravity | 23℃ | DIN 53479 | kg/m³ | 2100 | g/cm | 2.1 |
| Hardness | 23℃ | ISO868 | ShoreD | 65±3 | Shore D | 65±3 |
| Hardness | 23℃ | ISO868 | ShoreD | 65±3 | Shore D | 65±3 |
| Ball Indentation Hardness | 23℃ | DIN 53456H 135/30 | MPa | 35±5 | Ps | 5075±725 |
| Tensile Strength | 23℃ | ASTMD4745-11a | MPa | ≥12 | Ps | ≥1740 |
| Elongation At Break | 23℃ | ASTMD4745-11a | 9% | ≥45 | % | ≥45 |
| Compressive Strength | 23℃ | DIN53455 | MPa | Psi | ||
| Thermal Conductivity | DIN 52612 | J*10³ m*h*K |
≥3,5 | J*10³ m*h*K |
≥3,5 | |
| Coefficient Of Thermal Expansion | 25℃-200℃ | K -1*10-5 |
≥10,9 | K -1*10-5 |
210.9 | |
| MinimumServiceTemperature | ℃ | -200 | F | -328 | ||
| MaximumService Temperature | ℃ | 260 | F | 500 | ||
| Modulus | 23℃ | DIN 53457 | MPa | psi | ||
- PTFE layer: PTFE is a synthetic polymer with excellent chemical inertness and low friction properties. It serves as the base layer for PTFE Filled Carbon Gaskets, providing excellent chemical resistance and low friction properties.
- Carbon filler: Carbon filler is one of the main ingredients mixed with PTFE. Carbon filters can be carbon fibers, carbon particles, or other forms of carbon materials. They provide the electrical and thermal conductivity of the gasket, increasing its strength and durability.
- Other fillers (optional): In addition to carbon fillers, PTFE Filled Carbon Gasket can also add other fillers, such as glass fiber, graphite, ceramics, etc. These fillers can improve the properties of the gasket, such as increasing its mechanical strength, wear resistance, or high-temperature resistance.
- Gasket shape: PTFE Filled Carbon Gasket usually exists in a flat plate shape or ring shape. The flat shape is suitable for sealed connections such as pipes and valves, while the ring shape is suitable for flange connections.
Overall, PTFE Filled Carbon Gaskets combine the chemical inertness and low friction properties of PTFE with the electrical and thermal conductivity of carbon fillers. This makes them ideal for providing reliable sealing in high temperatures, pressures, and corrosive environments. However, specific construction and materials may vary by manufacturer and product type, so specific product specifications and technical data should be consulted when selecting and applying.
special features
■ Good corrosion resistance: PTFE is chemically inert and has good resistance to most chemical media, while the carbon filler enhances the mechanical strength and corrosion resistance of the gasket.
■ High-temperature stability: PTFE-Filled Carbon Gasket can maintain stability and sealing performance in high-temperature environments. The addition of carbon fillers further improves the heat resistance and mechanical strength of the gasket.
■ Widely adaptable: PTFE Filled Carbon Gasket seals are suitable for a variety of industrial fields and applications, including chemical, petroleum, pharmaceutical, food processing, and more. They can be used for sealing equipment such as pipelines, valves, pumps, and pressure vessels, and are suitable for a variety of media and working conditions.
■ Good chemical compatibility: PTFE Gasket has good chemical compatibility and is compatible with a variety of media. They do not react with most chemicals or contaminate media, making them suitable for a wide range of chemical and pharmaceutical applications.
■ Electrical conductivity: Due to the conductivity of carbon fillers, PTFE Filled Carbon Gaskets can provide electrostatic protection and are suitable for sealing needs in the electronics and semiconductor industry.
It should be noted that PTFE Filled Carbon Gasket may not be suitable in some special circumstances. For example, in the presence of fluorine gas and certain strong oxidants, PTFE may be damaged.
Applicable working conditions
1. High-pressure working conditions: PTFE Gasket has high-pressure resistance and can withstand the effects of high-pressure media and high-pressure fluids. They can provide reliable sealing in equipment such as high-pressure pipelines, valves, and pressure vessels, ensuring the safe operation of the system.
2. Corrosive media: Due to the excellent chemical inertness of PTFE, PTFE-Filled Carbon Gasket can resist the erosion of a variety of corrosive media. They can handle highly corrosive media such as acids, alkalis, and solvents, and are suitable for use in chemical, pharmaceutical, petroleum, and other industrial fields.
3. Viscous media: PTFE Filled Carbon Gaskets can handle media with a certain viscosity, such as colloids, slurries, etc. The addition of carbon filler helps resist media adhesion and clogging and maintains sealing performance.
4. High vacuum environment: PTFE-Filled Carbon Gaskets are suitable for sealing requirements in high vacuum environments. They have low gas permeability and low volatility to provide effective sealing in vacuum systems.
It is necessary to select appropriate PTFE-Filled Carbon Gaskets according to the specific working environment and characteristics of the medium and ensure that they comply with relevant standards and specifications. In addition, the appropriate gasket material and model should be selected based on parameters such as pressure, temperature, medium concentration, etc.
Production Process
1. Material preparation: Prepare the required raw materials, including polytetrafluoroethylene (PTFE), carbon fillers (such as carbon fiber or carbon particles), other fillers (optional, such as glass fiber or graphite), and necessary additives and lubricants.
2. Mixing and preparation: Mix PTFE and carbon filler according to a certain proportion, and add other fillers and additives. Mixing usually uses mechanical stirring or extrusion processes to ensure uniform mixing.
3. Press molding: Press the mixture into the desired shape, such as a flat plate or a ring shape. Pressing usually uses a hot or cold pressing process, where the mixture is placed in a mold and the appropriate temperature and pressure are applied to solidify and shape it.
4. Sintering and solidification: To improve strength and stability, the pressed gasket must be sintering and solidifying. The sintering process is usually carried out in a controlled high-temperature environment to form a strong bond between the PTFE and filler.
5. Processing and shaping: The sintered gasket can be further processed and shaped to obtain the required size and geometry. This may involve processes such as cutting, punching, and drilling.
6. Inspection and quality control: Inspect and quality control the finished gaskets to ensure that they meet the specifications. This may include visual inspection, dimensional measurements, sealing performance testing, etc.
7. Packaging and storage: Pack the inspected gaskets and store them properly to maintain their quality and performance.
It should be noted that different manufacturers and production plants may have slightly different production processes and steps, and the specific process flow may vary. Therefore, in actual applications, the manufacturer's product specifications and production guidelines should be consulted.
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