O-ring FPM 110.72x3.53 FKM Viton - Fluoroelastomer Sealing Ring

Technical Specifications

The nominal outside diameter is calculated as follows:

110.72 mm + 2 x 3.53 mm = 117.78 mm.

This is a geometrically calculated nominal dimension, not a separately verified manufacturing inspection dimension.

The exact elastomer compound, hardness, dimensional tolerances, and operating temperature range require confirmation against the product's technical documentation.

What Does O-ring FPM 110.72x3.53 FKM Viton Mean?

FPM and FKM refer to the same general family of fluorocarbon elastomers, although their exact properties depend on the compound formulation.

Viton is a trademark, not a generic designation for every FKM compound. The product name alone does not confirm that the O-ring is manufactured from a genuine Viton-branded compound.

Construction and Operating Principle

O-ring FPM 110.72x3.53 FKM Viton is a continuous elastomeric ring with a circular cross-section.

When installed in a correctly designed sealing groove, the elastomer undergoes controlled compression. This generates contact pressure between the O-ring and the mating surfaces, restricting the passage of the working medium through the sealing interface.

Sealing performance depends on:

• Sealing groove geometry.

• Compression of the 3.53 mm cross-section.

• Stretching of the ring during installation.

• Surface roughness of mating components.

• Operating pressure and extrusion gap.

• Operating temperature.

• Chemical compatibility between the FKM compound and the working medium.

• Compression set of the elastomer during service.

Correct selection requires consideration of the complete sealing arrangement rather than the nominal O-ring dimensions alone.

FPM / FKM - Fluoroelastomer Material Properties

Fluoroelastomers are widely used in technical sealing applications requiring resistance to selected oils, fuels, chemicals, and elevated operating temperatures.

Compared with many standard NBR compounds, appropriately selected FKM materials may provide improved thermal resistance, chemical resistance, and resistance to atmospheric ageing.

However, the properties of a specific sealing ring depend on the compound formulation, curing system, and operating conditions.

Important material selection criteria include:

• Resistance to the specific oil, fuel, or process fluid.

• Continuous and short-term operating temperatures.

• Hardness and compression set characteristics.

• Resistance to swelling in contact with the working medium.

• Operating pressure and sealing gap requirements.

• Compatibility with mating surface materials.

Not all FKM compounds are suitable for contact with ketones, certain amines, steam, or hot water.

Chemical compatibility must be verified for the specific compound and operating conditions.

An exact operating temperature range cannot be assigned to this product without confirmed material documentation.

O-ring FPM 110.72x3.53 FKM Viton vs Other Elastomers

Replacing FKM with NBR, EPDM, or VMQ requires verification of chemical compatibility, operating temperature, hardness, and sealing groove geometry.

Identical dimensions of 110.72x3.53 mm do not guarantee equivalent sealing performance.

O-ring Selection and Interchangeability

Before selecting O-ring FPM 110.72x3.53 FKM Viton, verify the requirements of the sealing application.

Important selection criteria include:

• Inside diameter: 110.72 mm.

• Cross-section diameter: 3.53 mm.

• Material: FPM / FKM.

• Exact fluoroelastomer compound.

• Shore A hardness.

• Dimensional tolerances.

• Sealing groove geometry.

• Required cross-section compression.

• Permissible stretching during installation.

• Operating pressure and temperature.

• Chemical compatibility with the working medium.

• Static or dynamic sealing conditions.

If the equipment manufacturer's documentation specifies a particular genuine Viton compound, a generic FKM O-ring should not automatically be considered equivalent.

Material compatibility must be established before substitution.

Applications of O-ring FPM 110.72x3.53 FKM Viton

O-ring FPM 110.72x3.53 FKM Viton may be considered for appropriately designed sealing arrangements in:

• Industrial equipment housings and covers.

• Flanged mechanical connections.

• Oil systems operating with compatible fluids.

• Selected fuel system applications.

• Mechanical assemblies requiring fluoroelastomer sealing components.

These are potential application categories based on the product geometry and general properties of FKM materials.

They do not establish confirmed compatibility with a particular machine, engine, gearbox, or OEM assembly.

Suitability for dynamic sealing requires additional assessment of friction, lubrication, operating speed, and sealing geometry.

Alternative Designations and Reference Formats

Natural descriptive formats include:

• O-ring FPM 110.72x3.53 FKM Viton

• O-ring 110.72x3.53 FKM

• O-ring 110.72x3.53 FPM

• FKM O-ring 110.72x3.53

• FPM Sealing Ring 110.72x3.53

• Fluoroelastomer O-ring 110.72x3.53

These are descriptive reference formats, not confirmed manufacturer catalogue numbers or OEM part numbers.

They do not establish that the product is manufactured from an original Viton-branded compound.

Installation, Handling and Storage

Before installation, clean the sealing groove and all mating surfaces.

Inspect the O-ring for cracks, cuts, permanent deformation, contamination, or other visible surface damage.

During installation:

• Avoid twisting the ring.

• Protect it from sharp edges.

• Avoid excessive stretching.

• Use only assembly lubricants compatible with the specific FKM compound and working medium.

• Ensure correct positioning within the groove.

• Verify uniform compression after assembly.

The O-ring should be stored in clean conditions, protected against mechanical damage and exposure to substances that may affect the elastomer.

Frequently Asked Questions - FAQ

What are the dimensions of O-ring FPM 110.72x3.53 FKM Viton?

The inside diameter is 110.72 mm, and the cross-section diameter is 3.53 mm. The geometrically calculated nominal outside diameter is 117.78 mm.

Are FPM and FKM the same material?

Yes. FPM and FKM are designations referring to the same general family of fluorocarbon elastomers. The exact material properties depend on the specific compound.

Is every FKM O-ring manufactured from genuine Viton?

No. Viton is a trademark associated with specific fluoroelastomers. Not every product designated FKM is manufactured from a Viton-branded compound.

Is O-ring FPM 110.72x3.53 resistant to oils?

Appropriately selected FKM compounds are resistant to many oils and lubricants. Compatibility must be confirmed for the specific working medium.

Is an FKM O-ring suitable for high temperatures?

Many FKM compounds are designed for elevated operating temperatures. However, the permissible temperature range for this particular product has not been confirmed.

What is the hardness of this O-ring?

The hardness is not specified in the supplied product designation. It requires confirmation against the technical product documentation.

Can O-ring 110.72x3.53 FKM be replaced with an NBR O-ring?

Not automatically. Chemical compatibility, operating temperature, hardness, and sealing arrangement requirements must be verified before substitution.

Is the outside diameter 117.78 mm?

Yes. This is the nominal outside diameter calculated from the 110.72 mm inside diameter and 3.53 mm cross-section. Actual manufactured dimensions depend on production tolerances.

O-ring FPM 110.72x3.53 FKM Viton - Key Technical Information

O-ring FPM 110.72x3.53 FKM Viton is a fluoroelastomer sealing ring with a 110.72 mm inside diameter and a 3.53 mm cross-section. FPM and FKM identify the fluorocarbon rubber material family, which may provide resistance to selected oils, fuels, and elevated temperatures. Exact compound composition, hardness, and fluid compatibility require verification.

FPM / FKM O-rings at simmering.pl

FPM / FKM O-rings, industrial sealing components, rolling bearings, and mechanical accessories are available through simmering.pl, a specialist B2B trading platform serving industrial companies, engineers, maintenance departments, and technical purchasing teams.

Our warehouse and order processing facilities are located in Lublin, Poland. We provide worldwide shipping from stock in Poland.

Technical product identification and selection assistance is available based on sealing dimensions, elastomer material, hardness, and application requirements.