O-Ring FPM 56.87x1.78 - Viton / FKM Fluoroelastomer Seal

Material Characteristics

The O-Ring FPM 56.87x1.78 is manufactured from high-performance fluoroelastomer FPM (also known as FKM / Viton). This material is engineered for applications requiring excellent resistance to oils, fuels, lubricants, chemical agents and elevated temperatures. The ring maintains stable elasticity and sealing integrity during long-term operation, even under thermal stress and chemical exposure.

Industrial Applications

This O-ring is commonly used in hydraulic systems, pneumatic equipment, fuel systems, lubrication circuits, pumps, valves and industrial machinery operating under demanding conditions. It ensures a reliable static seal and can also be used in low-dynamic applications where vibration or slight movement occurs.

Benefits of FPM / FKM / Viton Seals

• Exceptional resistance to oils, fuels, solvents and aggressive media
• Stable performance under high temperatures
• Long service life and high dimensional stability
• Low gas permeability ensures secure, leak-free operation
• Suitable for heavy-duty industrial environments

Main Description

The O-Ring FPM 56.87x1.78 is a precision sealing component intended for use in demanding industrial and mechanical systems. Fluoroelastomer FPM (FKM / Viton) provides outstanding resistance to oil-based fluids, chemical substances, fuel blends and continuous heat exposure. This makes the material suitable for situations where standard elastomers, such as NBR, would harden, swell or lose elasticity.

This sealing ring maintains a stable compression set, which ensures consistent sealing force and prevents leakage over extended service intervals. Its low gas permeability and robust structure make it suitable for static sealing joints, flange connections, enclosures, precision housings and systems exposed to thermal cycles or chemical wear.

Maintenance teams, machine manufacturers and industrial service operations rely on FPM O-rings where sealing reliability, long service life and material durability are essential. The dimensional profile 56.87x1.78 ensures accurate seating and uniform pressure distribution in the groove, minimizing the risk of seal failure during operation.

FAQ

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

Is FPM resistant to oils and fuels?
Yes. FPM offers excellent resistance to mineral oils, fuels, lubricants and many industrial chemicals.

Is this O-ring suitable for static sealing?
Yes. It is primarily designed for static sealing applications and low-dynamic contact conditions.

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