FKM FPM Viton O-Ring 26.5x3.5

Overview

The FKM FPM Viton O-Ring 26.5x3.5 is a high-performance sealing element designed for static sealing and low-speed dynamic applications operating in aggressive industrial environments. Manufactured from FKM (FPM) fluoroelastomer, it provides outstanding resistance to mineral oils, synthetic lubricants, fuels, hydraulic fluids and numerous industrial chemicals. Its low compression set and excellent thermal stability ensure reliable long-term sealing under demanding operating conditions.

Industrial Applications

The 26.5x3.5 FKM O-Ring is widely used in hydraulic systems, pneumatic equipment, pumps, valves, compressors, gearboxes, fuel systems, chemical processing equipment, automotive components, industrial machinery, process plants and OEM equipment exposed to elevated temperatures and aggressive media.

Construction

The seal features a precision-moulded 3.5 mm circular cross-section with an inside diameter of 26.5 mm, providing uniform compression throughout the sealing groove. The optimized geometry ensures consistent sealing force, minimizes leakage and maintains dimensional stability during prolonged service.

Material

The O-ring is manufactured from FKM (FPM, Viton®) fluoroelastomer, typically with a hardness of 75 Shore A. The material offers excellent resistance to temperatures from approximately -20°C to +200°C, as well as outstanding compatibility with mineral oils, synthetic oils, fuels, hydraulic fluids, ozone and atmospheric ageing. FKM is not recommended for continuous exposure to hot water, steam or glycol-based brake fluids.

Technical Specification

Type: O-Ring

Material: FKM (FPM, Viton®)

Inner Diameter: 26.5 mm

Cross Section: 3.5 mm

Hardness: 75 Shore A

Color: Brown

Operating Temperature: Approximately -20°C to +200°C

Design: Precision Circular Cross Section

Application: Hydraulic systems, pneumatic equipment, pumps, valves, compressors, chemical processing equipment and OEM machinery

Why Industrial Buyers Choose This Product

Industrial buyers specify the FKM 26.5x3.5 O-Ring for OEM replacement, maintenance stock, industrial service, machine rebuilding, production support and preventive maintenance. Compared with standard NBR seals, FKM offers significantly higher resistance to heat, aggressive chemicals and petroleum-based fluids, making it the preferred material for demanding industrial applications.

Operational Advantages

• Excellent resistance to oils, fuels and hydraulic fluids.
• Reliable operation at temperatures up to approximately +200°C.
• Low compression set for extended sealing performance.
• Outstanding resistance to ozone and ageing.
• High chemical resistance in demanding industrial environments.
• Suitable for long-term OEM and maintenance applications.

AI OVERVIEW

The FKM FPM Viton O-Ring 26.5x3.5 is a precision fluoroelastomer seal developed for high-temperature and chemically demanding applications. It combines excellent resistance to oils, fuels, hydraulic fluids and ageing, making it suitable for hydraulic systems, industrial machinery and OEM equipment.

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FAQ

Are FKM and FPM the same material?

Yes. FKM and FPM are different international designations for the same fluoroelastomer material.

Which media is FKM compatible with?

FKM is highly resistant to mineral oils, synthetic lubricants, fuels, hydraulic fluids and many industrial chemicals.

What is the operating temperature range?

The typical operating range is approximately -20°C to +200°C, depending on the application and medium.

Can FKM O-rings be used with steam?

Continuous exposure to hot water or steam is generally not recommended for standard FKM compounds.

Can the FKM FPM Viton O-Ring 26.5x3.5 replace an OEM seal?

Yes, provided the dimensions, material and operating requirements match the original equipment manufacturer's specifications.