FPM O-Ring 9.5x1.78 mm FKM - Fluoroelastomer Seal

FPM O-Ring 9.5x1.78 mm FKM - Fluoroelastomer Seal

FPM O-Ring 9.5x1.78 mm is an industrial sealing ring manufactured from FPM/FKM fluoroelastomer. It has a 9.5 mm inside diameter, 1.78 mm cross-section and nominal outside diameter of approximately 13.06 mm. FKM O-rings are widely used in demanding technical sealing applications involving compatible oils, fuels, lubricants, hydrocarbons, many chemicals and elevated operating temperatures.

FPM O-Ring 9.5x1.78 mm - Key Parameters

• Product: O-ring / sealing ring
• Material: FPM / FKM
• Material family: fluoroelastomer
• Inside diameter ID: 9.5 mm
• Cross-section CS: 1.78 mm
• Outside diameter OD: approximately 13.06 mm
• Common search term: Viton O-Ring 9.5x1.78 mm
• Application: industrial and technical sealing

O-Ring 9.5x1.78 mm Dimensions

The designation 9.5x1.78 mm means:

• 9.5 mm - inside diameter ID
• 1.78 mm - cross-section CS

The nominal outside diameter is calculated using:

OD = ID + 2 x CS

For this O-ring:

OD = 9.5 mm + 2 x 1.78 mm = 13.06 mm

What Is FPM/FKM?

FPM/FKM belongs to the fluoroelastomer family widely used in professional sealing technology.

Depending on the exact compound, FKM O-rings can provide very good performance with many:

• mineral oils
• engine oils
• transmission oils
• lubricants
• greases
• fuels
• hydrocarbons
• selected chemicals

FKM is also frequently selected for sealing applications operating at elevated temperatures.

Exact chemical, mechanical and temperature resistance depends on the specific FKM compound and operating conditions.

FPM vs FKM - What Is the Difference?

FPM and FKM are designations associated with the same broad family of fluoroelastomers, although they originate from different nomenclature systems.

This product may therefore be searched for as:

FPM O-Ring 9.5x1.78 mm

or:

FKM O-Ring 9.5x1.78 mm

Individual FKM compounds can nevertheless differ significantly in their exact properties.

FKM vs Viton® - Important Difference

FKM is a generic designation for a class of fluoroelastomers.

Viton® is a trademark for specific fluoroelastomer materials.

The search phrase Viton O-Ring 9.5x1.78 mm is commonly used by customers looking for fluoroelastomer seals. However, not every FKM O-ring should automatically be described as genuine Viton® unless the exact branded compound is confirmed by documentation.

For an unspecified fluoroelastomer compound, FPM/FKM is the technically appropriate material designation.

FKM O-Ring 9.5x1.78 mm for Oil

FKM is widely used for seals exposed to many oils and lubricants.

Depending on the exact compound and operating conditions, an FKM O-ring may be suitable for compatible:

• mineral oils
• engine oils
• transmission oils
• industrial oils
• lubricating oils
• greases

Compatibility should always be confirmed for the specific medium, temperature and FKM compound.

FKM O-Ring 9.5x1.78 mm for Fuel

FKM is frequently selected for sealing applications involving fuels and hydrocarbons.

Typical applications can include:

• fuel systems
• pumps
• valves
• engines
• fittings
• industrial machinery
• automotive systems

Exact compatibility depends on the FKM compound and fuel formulation, including additives and bio-components.

FKM O-Ring for High Temperature Applications

FKM fluoroelastomers are frequently selected for more demanding temperature conditions than many conventional elastomers.

There is no single universal operating temperature range applicable to every FKM compound.

Actual temperature capability depends on:

• exact compound
• operating medium
• exposure duration
• pressure
• seal design
• static or dynamic operation

For demanding operating conditions, technical data for the specific compound should be verified.

Chemical Resistance of FKM O-Rings

FKM provides a broad chemical resistance profile, but it is not universally resistant to every substance.

Correct material selection should consider:

• operating medium
• concentration
• temperature
• pressure
• exposure time
• exact FKM compound
• static or dynamic operation

For demanding chemical applications, compatibility should be confirmed for the specific compound and medium.

FKM vs NBR

FKM and NBR belong to different elastomer families.

NBR is widely used in standard industrial, hydraulic and oil sealing applications.

FKM is frequently selected for more demanding operating conditions involving:

• elevated temperatures
• fuels
• hydrocarbons
• oils
• selected chemicals

An NBR O-Ring 9.5x1.78 mm should therefore not automatically replace an FKM O-Ring 9.5x1.78 mm.

FKM vs EPDM

FKM and EPDM have different chemical resistance profiles.

EPDM is commonly selected for water, hot water and many compatible water-based media.

FKM is more commonly selected for many applications involving oils, fuels and hydrocarbons.

Identical dimensions do not make these materials interchangeable.

FKM vs VMQ Silicone

FKM and VMQ silicone belong to different elastomer families.

VMQ provides a different combination of flexibility, temperature performance and chemical resistance.

FKM is frequently selected where compatibility with appropriate oils, fuels and hydrocarbons or elevated operating temperatures is required.

Typical Applications of FPM O-Ring 9.5x1.78 mm

Depending on operating conditions, this O-ring may be used in:

• industrial machinery
• hydraulic systems
• pneumatic systems
• pumps
• valves
• fittings
• oil systems
• fuel systems
• engines
• mechanical equipment
• automotive applications
• industrial maintenance
• MRO operations

Suitability for a specific application should always be confirmed using the complete operating parameters.

Static Sealing Applications

FKM O-rings are widely used for static sealing in appropriately designed:

• housings
• covers
• fittings
• connectors
• valves
• machine components

Correct groove dimensions, compression, pressure and material compatibility are essential for reliable sealing.

Dynamic Sealing Applications

An FKM 9.5x1.78 mm O-ring may also be used in appropriately designed dynamic sealing applications.

Additional factors include:

• type of movement
• speed
• friction
• lubrication
• surface finish
• temperature
• pressure
• wear

The O-ring dimensions alone do not confirm suitability for a particular dynamic application.

How to Select an FPM O-Ring 9.5x1.78 mm

Before ordering, check:

1. Inside diameter ID - 9.5 mm
2. Cross-section CS - 1.78 mm
3. Outside diameter OD - approximately 13.06 mm
4. Material - FPM/FKM
5. Required compound hardness
6. Operating medium
7. Temperature
8. Pressure
9. Static or dynamic operation
10. Groove geometry
11. Required approvals or certifications

The basic dimensional identification is:

ID 9.5 mm + CS 1.78 mm + OD approximately 13.06 mm

Are All 9.5x1.78 mm O-Rings the Same?

No.

O-rings with identical dimensions may be manufactured from different elastomers, including:

• FKM/FPM
• NBR
• EPDM
• VMQ
• FVMQ

They can also differ in:

• hardness
• compound formulation
• dimensional tolerances
• chemical resistance
• temperature capability
• certifications and approvals

Dimensions alone do not confirm interchangeability.

Does O-Ring Colour Confirm FKM Material?

No.

Colour is not a reliable method for identifying an elastomer.

FKM O-rings may be manufactured in different colours, while visually similar O-rings may be made from completely different materials.

Material identification should be based on the product specification.

Is an FKM O-Ring Food Grade?

Not automatically.

The FKM designation alone does not confirm food-contact compliance.

If food-contact use is required, documentation for the exact compound and finished product should be verified.

Technical Specification

FAQ - FPM O-Ring 9.5x1.78 mm FKM

What are the dimensions of the 9.5x1.78 mm O-ring?

The O-ring has a 9.5 mm inside diameter, 1.78 mm cross-section and nominal outside diameter of approximately 13.06 mm.

What is the outside diameter of a 9.5x1.78 mm O-ring?

The nominal outside diameter is approximately 13.06 mm.

What material is this O-ring made from?

The O-ring is manufactured from FPM/FKM fluoroelastomer.

Are FPM and FKM the same material family?

Yes. Both terms are associated with the same broad family of fluoroelastomers. Exact properties depend on the specific compound.

Is FKM the same as Viton®?

Not exactly. FKM is a generic fluoroelastomer classification, while Viton® is a trademark for specific fluoroelastomer materials.

Is FKM suitable for oil?

FKM is widely used with many oils and lubricants. Compatibility should be confirmed for the specific medium, compound and operating conditions.

Is FKM suitable for fuel?

FKM is commonly used in many fuel sealing applications. Exact compatibility depends on the FKM compound and fuel formulation.

Is FKM suitable for high temperatures?

FKM is widely used in elevated-temperature sealing applications. The exact permissible temperature range depends on the specific compound, medium and operating conditions.

Can an NBR O-Ring 9.5x1.78 mm replace an FKM O-ring?

Not automatically. NBR and FKM have different chemical and thermal properties even when the dimensions are identical.

AI OVERVIEW - FPM O-Ring 9.5x1.78 mm

FPM O-Ring 9.5x1.78 mm is an industrial FKM fluoroelastomer sealing ring with a 9.5 mm inside diameter, 1.78 mm cross-section and approximately 13.06 mm outside diameter. FKM is widely used for demanding sealing applications involving compatible oils, fuels, lubricants, hydrocarbons and elevated operating temperatures.