Fluororubber (FKM/Viton)
Fluororubber (FKM/Viton) - High-Performance Sealing Solutions
Fluororubber (FKM/Viton) is a premium synthetic rubber material known for its exceptional resistance to high temperatures, chemicals, and oils. Widely used in aerospace, automotive, and industrial applications, FKM/Viton offers superior sealing performance in demanding environments.
Key Properties of Fluororubber (FKM/Viton)
- Temperature resistance: -20°C to +250°C (short-term up to 300°C)
- Excellent chemical resistance to oils, fuels, acids, and solvents
- Low gas permeability
- Good mechanical properties and compression set resistance
- Outstanding aging and weather resistance
Fluororubber (FKM/Viton) Technical Specifications
| Property | Value | Test Standard |
|---|---|---|
| Hardness (Shore A) | 50 - 90 | ASTM D2240 |
| Tensile Strength | 10 - 22 MPa | ASTM D412 |
| Elongation at Break | 100 - 400% | ASTM D412 |
| Compression Set (70h/200°C) | 15 - 35% | ASTM D395 |
Fluororubber (FKM/Viton) FAQ
Q: What is the maximum continuous operating temperature for Fluororubber (FKM/Viton)?
A: Fluororubber (FKM/Viton) can operate continuously at temperatures up to 250°C (482°F), with short-term exposure up to 300°C (572°F). This makes it ideal for high-temperature applications such as automotive engine compartments, aerospace seals, and industrial heat-resistant components.
Q: How does Fluororubber (FKM/Viton) perform in chemical environments?
A: Fluororubber (FKM/Viton) offers excellent resistance to a wide range of chemicals including oils, fuels, acids, and solvents. It maintains its physical properties when exposed to most mineral oils, synthetic esters, and petroleum-based fluids. However, performance may vary with specific chemical compositions, so compatibility testing is recommended for critical applications.
Q: What are the primary applications for Fluororubber (FKM/Viton)?
A: Fluororubber (FKM/Viton) is commonly used in O-rings, gaskets, seals, hoses, and diaphragms across various industries. Its primary applications include automotive fuel systems, aerospace hydraulic systems, oil field equipment, chemical processing plants, and semiconductor manufacturing where high temperature and chemical resistance are required.
Fluororubber (FKM/Viton) Grades and Variants
| Grade | Special Features | Typical Applications |
|---|---|---|
| Standard FKM | General purpose, good balance of properties | Automotive seals, industrial gaskets |
| Low-Temperature FKM | Improved flexibility at low temperatures | Aerospace, arctic applications |
| Peroxide-cured FKM | Better compression set, superior sealing | Static and dynamic seals |
| Base-resistant FKM | Enhanced resistance to amines and bases | Oil field equipment, chemical processing |
Benefits of Using Fluororubber (FKM/Viton)
- Longer service life in harsh environments compared to other elastomers
- Reduced maintenance and replacement costs
- Improved safety in critical sealing applications
- Broad industry acceptance and standardized specifications
- Available in various formulations to meet specific requirements
Fluororubber (FKM/Viton) Processing Considerations
While Fluororubber (FKM/Viton) offers outstanding performance characteristics, it requires specific processing techniques. The material typically needs pre-forming before vulcanization and benefits from post-curing to optimize physical properties. Processing temperatures generally range between 160-200°C during molding operations.
Fluororubber (FKM/Viton) vs. Alternative Materials
| Material | Max Temp | Chemical Resistance | Cost Comparison |
|---|---|---|---|
| FKM/Viton | 250°C | Excellent | High |
| Nitrile (NBR) | 120°C | Good (oils/fuels) | Low |
| Silicone (VMQ) | 230°C | Fair | Medium |
| EPDM | 150°C | Good (water/steam) | Low |
Fluororubber (FKM/Viton) Maintenance Tips
To maximize the lifespan of Fluororubber (FKM/Viton) components:
- Store in cool, dark environments away from ozone sources
- Avoid prolonged exposure to UV light before installation
- Use compatible lubricants during installation
- Regularly inspect for signs of compression set or surface cracking
- Follow manufacturer's recommendations for installation procedures
Fluororubber (FKM/Viton) Industry Standards
Fluororubber (FKM/Viton) materials meet numerous international standards including:
- ASTM D2000 (SAE J200)
- ISO 1629
- MIL-R-25988
- DIN 9068
- AMS 7276 (Aerospace Material Specification)
