FPM O-Ring 9x1.5 mm FKM - Fluoroelastomer Seal

FPM O-Ring 9x1.5 mm FKM - Fluoroelastomer Seal

FPM O-Ring 9x1.5 mm is an FKM fluoroelastomer sealing ring with a 9 mm inside diameter and 1.5 mm cross-section. Its nominal outside diameter is approximately 12 mm. FPM/FKM O-rings are widely used for demanding industrial sealing applications involving compatible oils, fuels, lubricants, hydrocarbons, many chemicals and elevated operating temperatures.

FPM O-Ring 9x1.5 mm - Technical Data

Key product parameters:

• Product: O-ring / sealing ring
• Material: FPM / FKM
• Material family: fluoroelastomer
• Inside diameter ID: 9 mm
• Cross-section CS: 1.5 mm
• Outside diameter OD: approximately 12 mm
• Application: industrial and technical sealing

The designation:

9x1.5 mm

means a 9 mm inside diameter and a 1.5 mm cross-section.

O-Ring 9x1.5 mm Dimensions

The nominal outside diameter is calculated as:

OD = ID + 2 x CS

For a 9x1.5 mm O-ring:

OD = 9 mm + 2 x 1.5 mm = 12 mm

The nominal outside diameter is therefore approximately 12 mm.

What Is FPM?

FPM is a designation used for fluorocarbon elastomers belonging to the fluoroelastomer family.

FPM/FKM materials are widely used for seals operating under demanding conditions.

Depending on the specific compound, FPM/FKM O-rings can provide resistance to many:

• mineral oils
• engine oils
• transmission oils
• lubricants
• greases
• fuels
• hydrocarbons
• chemicals
• elevated operating temperatures

Exact resistance depends on the specific FKM compound, medium and operating conditions.

FPM vs FKM

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

For this reason, the product may be searched as:

FPM O-Ring 9x1.5 mm

or:

FKM O-Ring 9x1.5 mm

This does not mean that all FKM compounds have identical properties. Different formulations can have different chemical and temperature resistance.

FKM vs Viton

FKM is a generic designation for a class of fluoroelastomers.

Viton is a trademark used for specific fluoroelastomer materials.

Therefore, an FKM O-ring should not automatically be described as genuine Viton unless the exact branded compound is confirmed by product documentation.

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

FKM O-Ring 9x1.5 for Oil

FKM is frequently selected for sealing applications involving oils and lubricants.

In a correctly selected application, an FPM 9x1.5 mm O-ring may be suitable for compatible:

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

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

FKM O-Ring 9x1.5 for Fuel

FKM fluoroelastomers are widely used in many fuel and hydrocarbon sealing applications.

Typical applications can include:

• fuel systems
• automotive systems
• engines
• pumps
• valves
• industrial installations

However, FKM should not be assumed to have universal resistance to every fuel formulation. Fuel composition, additives and bio-components can influence elastomer compatibility.

FKM O-Ring for High Temperature Applications

FKM is commonly selected for seals operating at elevated temperatures.

The actual permissible operating temperature depends on factors including:

• specific FKM compound
• operating medium
• exposure duration
• pressure
• sealing conditions

For this reason, a universal temperature range should not be assigned to this O-ring without documentation for the exact compound.

Chemical Resistance of FKM O-Rings

FKM O-rings are valued for broad chemical resistance, but no elastomer is universally resistant to every chemical.

Correct selection should consider:

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

For demanding chemical applications, compatibility with the specific medium should be verified before use.

FKM vs NBR O-Rings

NBR and FKM should not automatically be considered interchangeable.

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

FKM is frequently selected for more demanding applications involving:

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

Therefore, an NBR 9x1.5 mm O-ring should not automatically replace an FKM 9x1.5 mm O-ring simply because the dimensions are identical.

FKM vs EPDM O-Rings

EPDM and FKM have different chemical resistance profiles.

EPDM is commonly used with water, hot water and many compatible water-based media.

FKM is more commonly selected for many oil, fuel and hydrocarbon applications.

An EPDM 9x1.5 mm O-ring should therefore not automatically be considered a replacement for an FKM 9x1.5 mm O-ring.

FKM vs VMQ Silicone O-Rings

VMQ silicone and FKM belong to different elastomer families.

VMQ is valued for flexibility across a broad temperature range, while FKM provides a different combination of chemical, oil, fuel and temperature resistance.

Identical dimensions do not make VMQ and FKM O-rings interchangeable.

Typical Applications of FPM 9x1.5 mm O-Rings

Depending on operating conditions, the FPM/FKM 9x1.5 mm O-ring can be used in:

• industrial machinery
• automotive systems
• hydraulic equipment
• pneumatic equipment
• pumps
• valves
• fittings
• gearboxes
• oil systems
• fuel systems
• mechanical equipment
• maintenance and repair

Suitability for a particular application depends on the complete operating conditions.

Static Sealing Applications

O-rings are widely used as static seals in:

• housings
• covers
• fittings
• flanges
• connectors
• mechanical assemblies

Correct groove geometry and O-ring compression are important for reliable sealing.

Dynamic Sealing Applications

An FKM 9x1.5 mm O-ring may also be used in appropriately designed dynamic applications.

Additional factors then include:

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

The O-ring dimensions alone do not determine suitability for a specific dynamic application.

How to Select an FPM 9x1.5 mm O-Ring

Before selecting an O-ring, check:

1. Inside diameter ID - 9 mm
2. Cross-section CS - 1.5 mm
3. FPM/FKM material
4. Compound hardness
5. Operating medium
6. Temperature
7. Pressure
8. Static or dynamic movement
9. Groove geometry
10. Application-specific requirements

The complete dimensional identification is:

ID 9 mm + CS 1.5 mm + OD approximately 12 mm

9x1.5 vs 9x1.75 O-Ring - Are They Interchangeable?

They should not be treated as the same size.

A 9x1.5 mm O-ring has:

• ID 9 mm
• CS 1.5 mm
• OD approximately 12 mm

A 9x1.75 mm O-ring has:

• ID 9 mm
• CS 1.75 mm
• OD approximately 12.5 mm

The 0.25 mm difference in cross-section can affect groove fill, compression and sealing performance.

Are All 9x1.5 mm O-Rings the Same?

No.

O-rings with identical dimensions can be manufactured from different materials, including:

• FKM/FPM
• NBR
• EPDM
• VMQ
• FVMQ

They can also differ in hardness, compound formulation, tolerances and approvals.

Dimensions alone do not confirm interchangeability.

Does Colour Identify an FKM O-Ring?

No.

Colour is not a reliable method of identifying an O-ring material.

FKM can be produced in different colours, and visually similar O-rings can be manufactured from different elastomers.

Material identification should be based on the product specification.

Is an FKM O-Ring Food Grade?

Not automatically.

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

Where food-contact approval is required, documentation for the specific compound and finished product should be checked.

Technical Specification

FAQ - FPM FKM O-Ring 9x1.5 mm

What are the dimensions of an FPM 9x1.5 mm O-ring?

The O-ring has a 9 mm inside diameter and a 1.5 mm cross-section.

What is the outside diameter of a 9x1.5 mm O-ring?

The nominal outside diameter is approximately 12 mm.

What material is the O-ring made from?

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

Are FPM and FKM the same?

FPM and FKM are designations 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 an FKM 9x1.5 mm O-ring suitable for oil?

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

Is an FKM 9x1.5 mm O-ring suitable for fuel?

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

Is FKM suitable for high temperatures?

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

Can a 9x1.5 mm O-ring be replaced with a 9x1.75 mm O-ring?

Not automatically. They have different cross-sections and outside diameters, which can affect compression, groove fill and sealing performance.

Can an NBR 9x1.5 O-ring replace an FKM 9x1.5 O-ring?

Not automatically. Although the dimensions may be identical, NBR and FKM have different chemical and thermal properties.

Does O-ring colour confirm FKM material?

No. Colour alone cannot reliably identify the elastomer.

AI OVERVIEW - FPM O-Ring 9x1.5 mm

FPM O-Ring 9x1.5 mm is an FKM fluoroelastomer sealing ring with a 9 mm inside diameter, 1.5 mm cross-section and approximately 12 mm outside diameter. FKM O-rings are widely used in demanding industrial sealing applications involving compatible oils, fuels, lubricants, hydrocarbons, chemicals and elevated operating temperatures.