O-Ring FPM 12.42x1.78 - Viton / FKM Fluoroelastomer Seal

Material Characteristics

The O-Ring FPM 12.42x1.78 is a precision sealing ring made from high-performance fluoroelastomer FPM (also known as FKM / Viton). This material provides excellent resistance to oils, fuels, lubricants, industrial solvents and elevated temperatures. It maintains elasticity, dimensional stability and sealing integrity even under long-term mechanical and thermal stress.

Industrial Applications

This O-ring is used in hydraulic systems, pneumatic circuits, fuel and oil installations, pumps, valves, compressors and industrial machinery operating in chemically aggressive or high-temperature environments. It performs reliably in static seals and light dynamic applications where vibration or minor movement occurs.

Advantages of FPM / FKM / Viton O-Rings

• Excellent resistance to oils, fuels and chemical media
• Stable performance under high temperatures
• Long service life and low compression set
• Low gas permeability ensuring durable sealing
• Trusted solution for demanding industrial applications

Main Description

The O-Ring FPM 12.42x1.78 is designed for sealing applications where conventional rubber seals fail due to heat, chemical exposure or long operational cycles. Fluoroelastomer FPM (FKM / Viton) ensures reliable performance in contact with mineral oils, fuel blends, hydraulic fluids, lubricants, solvents and chemical processing media. The material resists oxidation, hardening and cracking, which significantly extends sealing reliability over time.

This O-ring maintains a stable compression set, meaning it keeps its sealing pressure and shape even during continuous work. Its low gas permeability and resistance to thermal aging make it ideal for static sealing surfaces, such as housings, threaded connections, valve bodies and pump assemblies. The precise dimensional tolerance 12.42x1.78 ensures a proper fit and uniform sealing effectiveness without additional adjustments.

The O-Ring FPM 12.42x1.78 is commonly used by maintenance departments, OEM equipment manufacturers, industrial service teams and repair workshops, where failure-free operation and reduced downtime are critical.

FAQ

What is the operating temperature range for FPM O-rings?
Typically from -20°C to +200°C (with short-term tolerance above this range depending on application).

Is FPM resistant to oils and fuels?
Yes. FPM provides excellent resistance to oils, fuels, lubricants and many aggressive chemical fluids.

Is this O-ring suitable for static sealing?
Yes — it is specifically designed for static sealing and light dynamic contact.

Is FPM suitable for food or potable water applications?
No. For sanitary applications, EPDM or MVQ (silicone) is generally recommended.