O-ring FPM 89.5x2.5 mm Viton FKM - Fluoroelastomer O-ring

O-ring FPM 89.5x2.5 mm Viton FKM - Fluoroelastomer O-ring

O-ring FPM 89.5x2.5 mm Viton FKM is a fluoroelastomer sealing ring with an inside diameter of 89.5 mm and a cross-section of 2.5 mm. FKM, also referred to as FPM, is widely used in sealing applications requiring resistance to elevated temperatures, oils, fuels, many hydrocarbons, ozone and weathering.

The product is sold individually. The displayed net price is for 100 pcs.

Technical data - O-ring FPM 89.5x2.5 mm

The exact hardness, compound formulation, colour, approvals and operating temperature range depend on the specific FKM compound. These parameters should not be assumed solely from the FKM or FPM material designation.

What does O-ring FPM 89.5x2.5 Viton FKM mean?

The 89.5x2.5 mm designation defines the two basic O-ring dimensions:

• 89.5 mm - inside diameter
• 2.5 mm - cross-section diameter

FKM identifies a family of fluoroelastomers widely used in sealing technology.

FPM is another designation used for this material group, particularly in European technical terminology.

Viton is a trade name associated with fluoroelastomer materials and is frequently used when searching for FKM O-rings. However, FKM, FPM and Viton should not be interpreted as specifications for one particular elastomer compound. Individual compounds may have different physical, chemical and thermal properties.

Construction of the 89.5x2.5 mm O-ring

The FPM 89.5x2.5 mm O-ring is a closed elastomeric sealing ring with a round 2.5 mm cross-section. When installed in a correctly designed groove, the O-ring is compressed between mating surfaces to create a seal.

O-rings can be used for static sealing and, with appropriate groove design and operating conditions, in selected dynamic sealing applications.

FKM / FPM material properties

FKM fluoroelastomers are widely used in industrial sealing technology because they combine thermal resistance, chemical resistance and good resistance to ageing.

Typical characteristics of FKM materials include:

• very good resistance to many oils
• very good resistance to many fuels
• resistance to numerous hydrocarbons
• very good ozone resistance
• very good weathering resistance
• good ageing resistance
• suitability for higher temperatures than many conventional elastomers
• resistance to a broad range of chemicals

FKM is not universally resistant to every chemical medium. Suitability should always be evaluated according to the actual fluid or gas, concentration, temperature, pressure and exposure time.

Operating temperature of FKM O-rings

A single fixed operating temperature range should not be assigned to this specific O-ring without confirmation of the exact FKM compound.

Different FKM formulations can have different minimum and maximum service temperatures. Actual temperature capability also depends on the operating medium, pressure, duration of exposure and type of sealing application.

For applications operating near material temperature limits, the technical specification of the particular FKM compound should be verified.

FPM 89.5x2.5 O-ring vs NBR 89.5x2.5 O-ring

FKM and NBR O-rings can have identical 89.5x2.5 mm dimensions while having different material properties.

FKM is commonly selected for applications requiring increased resistance to elevated temperatures, fuels, many hydrocarbons, ozone and weathering.

NBR is widely used in applications involving many oils and lubricants, but its chemical and thermal characteristics differ from those of FKM.

An NBR 89.5x2.5 mm O-ring should therefore not automatically be replaced by an FKM 89.5x2.5 mm O-ring, or vice versa, solely because the dimensions are identical.

Typical applications of FKM 89.5x2.5 mm O-rings

FKM O-rings are used across many industrial sealing applications, particularly where the sealing element may be exposed to oils, fuels, lubricants, hydrocarbons or elevated temperatures.

Typical application areas include:

• hydraulic systems
• pneumatic systems
• pumps
• valves
• industrial fittings
• oil systems
• fuel systems
• industrial equipment
• production machinery
• process equipment
• technical service
• maintenance and repair

These are typical application areas for FKM O-rings. They do not constitute confirmation that this specific 89.5x2.5 mm O-ring is suitable for a particular machine, vehicle or OEM application.

How to select an O-ring 89.5x2.5 mm

Before ordering, verify:

• 89.5 mm inside diameter
• 2.5 mm cross-section
• required elastomer material
• compound hardness, if specified
• operating medium
• operating temperature
• pressure
• static or dynamic operation
• groove dimensions and design
• required material approvals

Identical 89.5x2.5 mm dimensions do not automatically make O-rings manufactured from FKM, NBR, EPDM, VMQ or other elastomers fully interchangeable.

Alternative designations and search references

Natural designation variants include:

• O-ring FPM 89.5x2.5
• O-ring FKM 89.5x2.5
• FPM O-ring 89.5x2.5 mm
• FKM O-ring 89.5x2.5 mm
• O-ring 89.5x2.5 FKM
• O-ring 89.5x2.5 FPM
• Viton O-ring 89.5x2.5
• O-ring Viton 89.5x2.5
• FKM seal 89.5x2.5 mm
• FKM sealing ring 89.5x2.5 mm

These are natural variations used to identify and search for this size and material. They do not confirm a particular manufacturer or exact elastomer compound.

Sold individually - net price shown for 100 pcs

The FPM 89.5x2.5 mm O-ring is sold individually, allowing industrial customers, maintenance departments and technical services to order the quantity required for a specific application.

The displayed net price is for 100 pcs.

When comparing the price with other offers, please note that the net price displayed on the product page represents the value of 100 O-rings in size 89.5x2.5 mm FKM/FPM.

Installation of the FKM 89.5x2.5 mm O-ring

Before installation, clean the groove and mating surfaces carefully. Protect the O-ring from sharp edges, burrs and exposed threads.

During installation, avoid:

• cutting or nicking the O-ring surface
• excessive stretching
• twisting the ring
• damage caused by sharp edges
• contamination of sealing surfaces

If an assembly lubricant is used, verify that it is compatible with both the FKM compound and the operating medium.

FAQ - O-ring FPM 89.5x2.5 Viton FKM

What are the dimensions of the FPM 89.5x2.5 O-ring?

The O-ring has an inside diameter of 89.5 mm and a cross-section diameter of 2.5 mm. Its dimensional designation is 89.5x2.5 mm.

What does FKM mean in an O-ring?

FKM identifies a family of fluoroelastomers used in sealing technology. FKM materials are known particularly for resistance to elevated temperatures, many oils, fuels, hydrocarbons, ozone and weathering.

Are FPM and FKM the same material?

FPM and FKM are designations referring to the fluoroelastomer material group. Neither designation alone specifies the exact compound formulation, hardness or complete technical properties.

Are Viton and FKM exactly the same?

Not exactly. FKM is a generic designation for a family of fluoroelastomers, while Viton is a trade name associated with specific fluoroelastomer materials. The FKM designation alone does not confirm the manufacturer or exact Viton compound.

Is the O-ring FPM 89.5x2.5 sold individually?

Yes. The O-ring is sold individually, so the required number of pieces can be ordered. However, the displayed net price is for 100 pcs.

Can an FKM 89.5x2.5 O-ring replace an NBR 89.5x2.5 O-ring?

Not automatically. Although the dimensions are identical, FKM and NBR have different material properties. The operating medium, temperature, pressure and other application conditions must be checked before substitution.

Is an FKM O-ring resistant to oils and fuels?

FKM generally provides very good resistance to many oils and fuels. Compatibility of the specific FKM compound with the actual medium and operating conditions should still be verified.

What is the operating temperature of an FKM 89.5x2.5 O-ring?

There is no single temperature range applicable to every FKM compound. The permissible operating temperature depends on the exact compound, operating medium and application conditions.

O-ring FPM 89.5x2.5 Viton FKM - key information

O-ring FPM 89.5x2.5 mm is an FKM/FPM fluoroelastomer sealing ring with an inside diameter of 89.5 mm and a 2.5 mm cross-section. FKM is commonly selected for resistance to elevated temperatures, oils, fuels, many hydrocarbons and ozone. The product is sold individually, while the displayed net price is for 100 pcs.

Availability from simmering.pl

O-ring FPM 89.5x2.5 mm is available from simmering.pl for industrial customers, maintenance departments, technical services and B2B procurement.

Products are supplied from stock in Poland, with worldwide shipping available. simmering.pl specialises in industrial sealing solutions and supplies O-rings in a wide range of dimensions and elastomer materials.