Fluorine rubber sealing gasket

描述

fluorine rubber sealing gasket,fluororubber sealing washer or liner

Fluorocarbon rubber sealing gaskets are high-performance sealing components renowned for their exceptional resistance to high temperatures, chemical corrosion, and oils. Below is a detailed description of their primary characteristics and applications:

Key Features

1. Exceptional High-Temperature Resistance

Fluorocarbon rubber sealing gaskets can operate continuously at temperatures ranging from 200°C to 250°C, and can even withstand short-term exposure to temperatures as high as 300°C. This performance significantly surpasses that of materials such as silicone (approximately 180°C) and EPDM (approximately 150°C).

2. Exceptional Chemical Resistance

Fluorocarbon rubber exhibits formidable resistance to acids, alkalis, oils, fuels, and numerous organic solvents. Its molecular structure features C-F bonds with an energy of 485 kJ/mol, conferring exceptional chemical stability.

3. Outstanding Oil Resistance

Fluorocarbon rubber seals demonstrate particularly remarkable performance in oil-laden air environments. For instance, after 1000 hours of continuous operation in oil-laden air at 150°C, its volume change rate remains below 4%, whereas standard nitrile rubber (NBR) may exceed 30%.

4. Weather Resistance and Ageing Resistance

Fluorocarbon rubber exhibits exceptional resistance to ozone, ultraviolet radiation, and oxygen, with a service life 3–5 times longer than conventional rubbers.

5. High-Vacuum Suitability

Fluorocarbon rubber is the sole sealing material viable under high-vacuum conditions (e.g., below 1.33×10⁻⁷ Pa).

Primary Applications

1. Aerospace and Defence Industries

Employed in sealing components for aircraft, rockets, satellites, and similar equipment, withstanding extreme temperatures and corrosive media.

2. Automotive and Machinery Manufacturing

Suitable for high-temperature, high-pressure, oil-containing environments in engines, gearboxes, air compressors, etc.

3. Petrochemicals and Energy

Employed in refinery equipment, natural gas desulphurisation units, chemical pumps and valves to seal highly corrosive substances.

4. Electronics and Home Appliances

Fluororubber seals feature in premium products from brands like Midea.

5. Limitations

Cost-prohibitive: Approximately 20 times the price of standard rubber.

Poor Cold Resistance: Limited low-temperature performance, with standard grades operating down to -26°C.

Processing Difficulty: Lower elasticity and air permeability necessitate stringent manufacturing requirements.

Fluorocarbon rubber seals represent an ideal solution for demanding environments involving high temperatures, pressures, and corrosive agents, particularly in aerospace, automotive, and chemical industries. Despite higher upfront costs, their extended service life and reliability substantially reduce overall maintenance expenses.