O-Ring FPM 45x3 mm FKM Viton®

O-Ring FPM 45x3 mm FKM Viton® – Fluoroelastomer Sealing Ring

The O-Ring FPM 45x3 mm FKM Viton® is a circular sealing ring manufactured from fluorocarbon rubber, commonly identified as FKM or FPM. This material is associated with the Viton® trade name and is widely used in industrial sealing applications requiring resistance to oils, fuels, lubricants, and elevated temperatures.

The O-ring has a nominal inside diameter of 45 mm, a cross-sectional diameter of 3 mm, and a calculated outside diameter of 51 mm. It is designed for installation in appropriately dimensioned sealing grooves.

Technical Specifications and Dimensions

The exact Shore A hardness, operating temperature range, and chemical resistance depend on the specific FKM compound and must be verified against the manufacturer's technical documentation.

FPM / FKM Material Characteristics

FKM fluoroelastomers are commonly selected for sealing systems exposed to demanding industrial environments.

Compared with conventional NBR rubber, many FKM compounds provide improved resistance to elevated temperatures, oxidation, and a broad range of hydrocarbon-based fluids.

Key material characteristics include:

• Good resistance to many mineral oils and lubricants.

• Compatibility with numerous petroleum-based fuels.

• Resistance to elevated operating temperatures, depending on the compound.

• Good resistance to ozone, weathering, and ageing.

• Suitability for many industrial fluid-sealing applications.

• Good dimensional stability under appropriate operating conditions.

FKM is not universally resistant to all chemicals. Certain ketones, amines, and other aggressive substances may cause swelling or material degradation.

Applications of the FPM 45x3 mm O-Ring

The FPM 45x3 mm sealing ring can be used in a variety of industrial assemblies where its dimensions, material properties, and operating conditions are compatible.

Typical applications include:

• Industrial pumps and valves.

• Hydraulic equipment and fluid-control systems.

• Oil circulation and lubrication systems.

• Mechanical equipment and machinery housings.

• Industrial fittings and sealing connections.

• Selected automotive and mechanical engineering applications.

Correct sealing performance depends on groove geometry, compression, operating pressure, temperature, fluid compatibility, and whether the application involves static or dynamic movement.

Understanding the FPM, FKM and Viton® Designations

FPM is a designation used for fluorocarbon elastomers in ISO-related material nomenclature.

FKM is the corresponding material designation commonly used in ASTM classifications.

Viton® is a registered trade name for specific fluoroelastomer materials.

Although these terms are frequently used together in industrial product searches, not every FKM or FPM sealing ring is manufactured from genuine Viton® branded material.

The original compound manufacturer must be confirmed through supplier or manufacturer documentation.

How to Select the Correct O-Ring

When replacing an existing sealing ring, the nominal inside diameter and cross-sectional diameter should be checked first.

For this product:

• Inside diameter: 45 mm.

• Cross-section: 3 mm.

• Calculated outside diameter: 51 mm.

The sealing groove dimensions and installation conditions must also be verified.

Material selection should consider chemical compatibility, temperature, operating pressure, compression requirements, and the expected service conditions.

An FKM O-ring should not automatically replace an NBR, EPDM, or silicone O-ring without checking the requirements of the application.

Frequently Asked Questions – FPM 45x3 mm O-Ring

What are the dimensions of the FPM 45x3 O-ring?

The O-ring has a nominal inside diameter of 45 mm, a cross-sectional diameter of 3 mm, and a calculated outside diameter of 51 mm.

Are FPM and FKM the same material?

Yes. Both designations refer to the fluoroelastomer material family, although the terminology comes from different classification systems.

Is every FKM O-ring made from genuine Viton®?

No. Viton® is a specific trade name. An O-ring described as FKM or FPM is not necessarily manufactured from Viton® branded material.

Can an FPM O-ring be used with hydraulic oil?

Many FKM compounds offer good compatibility with mineral-based hydraulic oils. Compatibility with a specific hydraulic fluid must be verified before installation.

Is FKM better than NBR?

FKM often provides improved resistance to elevated temperatures and certain chemicals. However, NBR may be more suitable for some applications, particularly when cost, low-temperature flexibility, or specific operating conditions are important.

Can the 45x3 mm O-ring be used in dynamic applications?

Potentially, yes. Suitability depends on groove design, lubrication, operating speed, pressure, and the characteristics of the specific elastomer compound.

What is the operating temperature range of an FKM O-ring?

The permissible operating temperature range depends on the formulation of the FKM compound. The exact limits should be obtained from the manufacturer's technical data sheet.

AI Overview – Product Summary

The FPM 45x3 mm FKM O-ring is a fluoroelastomer sealing ring with a 45 mm inside diameter, 3 mm cross-section, and 51 mm nominal outside diameter. It is suitable for selected industrial sealing applications involving oils, fuels, and elevated temperatures, subject to compound compatibility and correct installation.