O-ring FPM 7.5x2 mm FKM Viton - Fluoroelastomer O-ring

O-ring FPM 7.5x2 mm FKM Viton - Fluoroelastomer O-ring

O-ring FPM 7.5x2 mm FKM Viton is a fluoroelastomer sealing ring with an inside diameter of 7.5 mm and a cross-section of 2 mm. The O-ring has a closed circular construction and round cross-section. FKM, also referred to as FPM, is widely used in sealing technology where resistance to elevated temperatures, many oils, fuels, hydrocarbons, ozone and ageing is required.

Technical data - O-ring FPM 7.5x2 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/FPM material designation.

What does O-ring FPM 7.5x2 FKM Viton mean?

The designation identifies the product type, dimensions and material family:

• O-ring - sealing ring with a circular cross-section
• 7.5 mm - inside diameter
• 2 mm - cross-section diameter
• FKM - designation for the fluoroelastomer material family
• FPM - designation for fluorocarbon rubber commonly used in European technical terminology
• Viton - trade name associated with fluoroelastomer materials

FKM, FPM and Viton are frequently encountered when identifying fluorocarbon O-rings. However, these terms alone do not define the exact elastomer formulation, hardness or complete operating temperature range.

Construction of the FKM 7.5x2 mm O-ring

The 7.5x2 mm O-ring is a closed elastomeric sealing ring with a round 2 mm cross-section and an inside diameter of 7.5 mm.

When installed in a correctly designed groove, the O-ring is compressed between the mating surfaces. Controlled deformation of the elastomer creates the sealing effect.

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

FKM / FPM material properties

FKM belongs to the fluoroelastomer family and is widely used in industrial sealing technology.

Typical characteristics of many FKM compounds include:

• very good resistance to many oils
• very good resistance to many fuels
• resistance to numerous hydrocarbons
• very good resistance to ozone
• very good resistance to ageing
• very good weathering resistance
• suitability for elevated-temperature applications
• resistance to a broad range of chemical media

FKM is not universally resistant to every chemical.

Before use, compatibility of the specific FKM compound should be checked against the operating medium, concentration, temperature, pressure and duration of exposure.

Operating temperature of the FKM 7.5x2 mm O-ring

A single operating temperature range should not be assigned to this product solely on the basis of the FKM designation.

FKM is a family of fluoroelastomers containing different compounds. Individual formulations can differ in hardness, low-temperature flexibility, high-temperature capability and chemical resistance.

Where operating temperature is a critical parameter, the specification of the exact FKM compound should be verified.

FKM 7.5x2 O-ring vs NBR 7.5x2 O-ring

An FKM 7.5x2 mm O-ring and an NBR 7.5x2 mm O-ring may have identical dimensions but should not automatically be considered interchangeable.

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

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

The required elastomer should therefore be selected according to the actual operating conditions.

Alternative designations and search references

Natural designation variants include:

• O-ring FPM 7.5x2
• O-ring FKM 7.5x2
• O-ring FPM 7.5x2 mm
• O-ring FKM 7.5x2 mm
• FPM O-ring 7.5x2 mm
• FKM O-ring 7.5x2 mm
• O-ring 7.5x2 FKM
• O-ring 7.5x2 FPM
• Viton O-ring 7.5x2
• O-ring Viton 7.5x2
• FKM seal 7.5x2 mm
• FKM sealing ring 7.5x2 mm

These are natural designation variants used to identify the size and material. They are not confirmed OEM numbers or manufacturer-specific reference numbers.

How to select a 7.5x2 mm O-ring

Before ordering, verify:

• 7.5 mm inside diameter
• 2 mm cross-section
• required elastomer material
• required compound hardness
• operating medium
• operating temperature
• system pressure
• static or dynamic operation
• groove dimensions and design
• required material approvals

The 7.5x2 mm dimensions alone are not sufficient to establish full interchangeability.

An FKM 7.5x2 mm O-ring may have the same dimensions as an NBR, EPDM or VMQ O-ring, but these materials have different chemical, thermal and mechanical properties.

Typical applications of FKM O-rings

FKM O-rings are widely used in industrial sealing systems, 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
• maintenance
• technical service

These are typical application areas for FKM O-rings. They do not confirm the suitability of this specific 7.5x2 mm O-ring for a particular machine, vehicle or OEM application.

Installation of the FKM 7.5x2 mm O-ring

Before installation, carefully clean the groove and mating surfaces.

During installation, avoid:

• cutting or nicking the O-ring
• contact with sharp edges
• excessive stretching
• twisting the ring
• pulling the O-ring over exposed sharp threads without protection
• contamination of the sealing surfaces

If an assembly lubricant is used, verify its compatibility with both the FKM compound and the operating medium.

FAQ - O-ring FPM 7.5x2 FKM Viton

What are the dimensions of the FPM 7.5x2 O-ring?

The O-ring has an inside diameter of 7.5 mm and a cross-section diameter of 2 mm. Its dimensional designation is 7.5x2 mm.

What does FKM mean in a 7.5x2 O-ring?

FKM identifies a family of fluoroelastomers used in sealing technology. These materials are commonly selected for resistance to elevated temperatures, many oils, fuels, hydrocarbons, ozone and ageing.

Are FPM and FKM the same type of material?

FKM and FPM are designations referring to the fluorocarbon elastomer material family. The designation alone does not define the exact compound formulation, hardness or complete operating parameters.

Are Viton and FKM exactly the same?

No. 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 a specific Viton compound.

Can an FKM 7.5x2 O-ring replace an NBR 7.5x2 O-ring?

Not automatically. Although both O-rings may have identical dimensions, FKM and NBR have different material properties. The operating medium, temperature, pressure and other application requirements must be checked before substitution.

Is an FKM 7.5x2 O-ring resistant to oil?

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

Is an FKM O-ring resistant to fuel?

FKM materials generally provide very good resistance to many fuels. Suitability for the specific fuel formulation and operating conditions should still be verified.

What is the operating temperature of an FKM 7.5x2 O-ring?

There is no single operating temperature range applicable to every FKM compound. Temperature capability depends on the exact elastomer formulation, operating medium and application conditions.

O-ring FPM 7.5x2 FKM Viton - key information

O-ring FPM 7.5x2 mm is an FKM/FPM fluoroelastomer sealing ring with a 7.5 mm inside diameter and 2 mm cross-section. FKM is commonly used where resistance to elevated temperatures, many oils, fuels, hydrocarbons, ozone and ageing is required. Final selection should consider the exact compound, operating medium and application conditions.

Availability from simmering.pl

O-ring FPM 7.5x2 mm FKM is available from simmering.pl for industrial customers, maintenance departments, technical services, distributors and B2B procurement.

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