O-ring FPM 8.13x1.78 mm FKM Viton - Fluoroelastomer O-ring

O-ring FPM 8.13x1.78 mm FKM Viton - Fluoroelastomer O-ring

O-ring FPM 8.13x1.78 mm FKM Viton is a fluoroelastomer sealing ring with an inside diameter of 8.13 mm and a cross-section of 1.78 mm. The O-ring has a closed circular construction with a 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 8.13x1.78 mm

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

What does O-ring FPM 8.13x1.78 FKM Viton mean?

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

• O-ring - sealing ring with a circular cross-section
• 8.13 mm - inside diameter
• 1.78 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 together when identifying fluorocarbon O-rings. However, these terms alone do not define the exact elastomer compound, hardness or complete operating temperature range.

Construction of the FKM 8.13x1.78 mm O-ring

The 8.13x1.78 mm O-ring is a closed elastomeric ring with a round cross-section measuring 1.78 mm in diameter and an inside diameter of 8.13 mm.

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

O-rings can be used in static sealing applications and, when the sealing system is appropriately designed, in selected dynamic applications.

FKM / FPM material properties

FKM belongs to the fluoroelastomer family and is widely used for industrial sealing applications where chemical resistance, thermal resistance and resistance to ageing are important.

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.

Compatibility should be checked against the actual operating medium, concentration, temperature, pressure and duration of exposure. The exact FKM compound can significantly influence chemical and thermal performance.

Operating temperature of the FKM 8.13x1.78 mm O-ring

A single operating temperature range should not be assigned to this specific O-ring solely on the basis of its FKM designation.

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

For applications where temperature is critical, the specification of the exact elastomer compound should be verified.

FKM 8.13x1.78 vs NBR 8.13x1.78 O-ring

An FKM 8.13x1.78 mm O-ring and an NBR 8.13x1.78 mm O-ring may have identical dimensions but different material properties.

FKM is commonly selected where increased resistance to elevated temperatures, many fuels, hydrocarbons, ozone and ageing is required.

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

Identical dimensions therefore do not establish full interchangeability.

Alternative designations and search references

Natural designation variants include:

• O-ring FPM 8.13x1.78
• O-ring FKM 8.13x1.78
• O-ring FPM 8.13x1.78 mm
• O-ring FKM 8.13x1.78 mm
• FKM O-ring 8.13x1.78
• FPM O-ring 8.13x1.78
• O-ring 8.13x1.78 FKM
• O-ring 8.13x1.78 FPM
• Viton O-ring 8.13x1.78
• O-ring Viton 8.13x1.78
• FKM seal 8.13x1.78 mm
• FKM sealing ring 8.13x1.78 mm

These are natural designation variants for identifying the size and material. They should not be interpreted as confirmed OEM or manufacturer-specific reference numbers.

How to select an 8.13x1.78 mm O-ring

Before ordering, verify:

• 8.13 mm inside diameter
• 1.78 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 dimensions alone are not sufficient to determine full interchangeability.

An FKM 8.13x1.78 mm O-ring can have the same dimensions as an NBR, EPDM or VMQ O-ring while providing significantly 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 8.13x1.78 mm O-ring for a particular machine, vehicle or OEM application.

Installation of the FKM 8.13x1.78 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 8.13x1.78 FKM Viton

What are the dimensions of the FPM 8.13x1.78 O-ring?

The O-ring has an inside diameter of 8.13 mm and a cross-section diameter of 1.78 mm. Its dimensional designation is 8.13x1.78 mm.

What does FKM mean in an 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. Neither designation alone defines 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. An FKM designation alone does not confirm a specific Viton compound.

Can an FKM 8.13x1.78 O-ring replace an NBR 8.13x1.78 O-ring?

Not automatically. Although the dimensions may be identical, FKM and NBR have different material characteristics. The operating medium, temperature, pressure and application requirements must be checked before substitution.

Is an FKM O-ring resistant to oil?

FKM generally provides very good resistance to many oils and lubricants. Compatibility with the specific operating medium should still be verified for the exact FKM compound.

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 nevertheless be verified.

What is the operating temperature of an FKM 8.13x1.78 O-ring?

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

O-ring FPM 8.13x1.78 FKM Viton - key information

O-ring FPM 8.13x1.78 mm is an FKM/FPM fluoroelastomer sealing ring with an inside diameter of 8.13 mm and a 1.78 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 and operating conditions.

Availability from simmering.pl

O-ring FPM 8.13x1.78 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.