What are the raw materials for gaskets? | WTA Guide
# What Are the Raw Materials for Gaskets?
Gaskets are critical components in engine sealing, ensuring leak-proof connections under extreme conditions. The choice of raw materials directly impacts durability, temperature resistance, and chemical compatibility. Below, we break down the most common materials used in gasket manufacturing.
1. Elastomers (Rubber-Based Materials)
- Nitrile Rubber (NBR): Oil-resistant, ideal for fuel and oil systems.
- Fluoroelastomer (FKM/Viton®): High heat and chemical resistance, used in aggressive environments.
- Silicone: Flexible, temperature-resistant (-60°C to 230°C), common in automotive gaskets.
- EPDM: Weather and ozone-resistant, suitable for coolant systems.
2. Metals
- Stainless Steel: Corrosion-resistant, used in high-pressure applications.
- Copper: Soft, malleable, and conductive, often used in exhaust gaskets.
- Aluminum: Lightweight and corrosion-resistant, common in cylinder head gaskets.
3. Composite Materials
- Graphite: High-temperature resistance (up to 450°C), excellent sealing under compression.
- PTFE (Teflon®): Chemically inert, low friction, used in chemical processing.
- Aramid Fiber (Kevlar®): High strength, used in high-pressure sealing.
4. Cork & Fiber
- Cork: Natural, compressible, used in low-pressure applications.
- Compressed Fiber (Non-Asbestos): Heat-resistant, reinforced with rubber or resin.
Key Considerations for Material Selection
- Temperature Range: Ensure material stability under operating conditions.
- Chemical Compatibility: Match material resistance to fluids (oil, coolant, fuel).
- Pressure Tolerance: Select materials that withstand system pressures.
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