FPM O-Ring 34x3 mm FKM Viton - Fluoroelastomer O-Ring

Overview

The FPM O-Ring 34x3 mm FKM Viton is a high-performance fluoroelastomer sealing ring designed for demanding industrial, hydraulic, automotive and mechanical applications.

The O-ring features an inside diameter of 34 mm and a 3 mm cross-section. It is manufactured from FPM / FKM fluoroelastomer, a sealing material valued for its high temperature capability and excellent resistance to many oils, fuels, greases and hydrocarbons.

The precise 34x3 mm dimensions make this O-ring suitable for correctly designed sealing grooves in pumps, valves, hydraulic assemblies, fuel systems, oil systems and industrial machinery.

FKM is particularly useful in operating environments where conventional NBR seals may not provide sufficient resistance to elevated temperatures, fuels or aggressive media.

Industrial Applications

The FPM FKM 34x3 mm O-Ring can be used in:

• Pumps
• Industrial valves
• Hydraulic systems
• Fuel systems
• Oil circulation systems
• Engines
• Gearboxes
• Compressors
• Industrial fittings
• Automotive equipment
• Manufacturing machinery
• Process equipment
• OEM assemblies

34x3 mm Dimensions

The 34x3 mm designation specifies:

Inner Diameter: 34 mm

Cross Section: 3 mm

The O-ring has a circular elastomeric profile with a 3 mm cross-section.

When installed in a correctly designed groove, the O-ring undergoes controlled compression. This creates contact pressure between the elastomer and mating surfaces, helping to prevent leakage.

The 3 mm cross-section must correspond to the sealing groove design. A 34x3 mm O-ring should not automatically be replaced with a 34x4 mm version.

FPM / FKM Fluoroelastomer

FKM is the internationally recognized designation for a family of high-performance fluoroelastomers used in technical sealing applications.

FPM is another designation commonly encountered in European technical documentation.

Fluoroelastomers are valued for their combination of:

• High temperature resistance
• Excellent resistance to many oils
• Excellent resistance to many fuels
• Hydrocarbon resistance
• Broad chemical resistance
• Good ozone resistance
• Good ageing resistance

These properties make FKM suitable for demanding sealing conditions in industrial and automotive equipment.

Viton - Common Term for FKM Seals

Viton is a well-known trademark associated with specific fluoroelastomer materials. It is also widely used as a search term for FKM seals.

This product may therefore be searched for as:

• FPM O-Ring 34x3
• FKM O-Ring 34x3
• Viton O-Ring 34x3
• Fluoroelastomer O-Ring 34x3
• FKM Seal 34x3

Where a specific branded Viton material or particular FKM compound is required, the exact material specification should be verified.

High Temperature Resistance

One of the major advantages of FKM is its ability to operate at temperatures significantly higher than those typically suitable for standard NBR.

Many standard FKM compounds operate within approximately:

-20°C to +200°C

Actual operating limits depend on:

• Specific FKM compound
• Operating medium
• Duration of exposure
• System pressure
• Seal design
• Application conditions

Special FKM formulations may provide different temperature capabilities.

Oil Resistance

FKM provides excellent resistance to many oils and lubricants.

Depending on the specific compound and operating conditions, it can be used with many:

• Mineral oils
• Engine oils
• Gear oils
• Hydraulic oils
• Lubricating greases
• Petroleum-based fluids
• Industrial lubricants

This makes the FKM O-Ring 34x3 mm particularly suitable for machinery, hydraulic equipment, pumps, engines and gearboxes.

Fuel Resistance

Fluoroelastomer FKM is widely used in components exposed to fuels and hydrocarbons.

Potential applications include:

• Fuel pumps
• Fuel valves
• Fuel connections
• Engine components
• Fuel systems
• Industrial fuel equipment

Compatibility should always be verified for the specific fuel formulation and operating temperature.

Chemical Resistance

FKM provides broad resistance to many industrial chemicals and operating fluids.

Depending on the exact compound, FKM can provide very good resistance to many:

• Hydrocarbons
• Oils
• Fuels
• Industrial fluids
• Chemicals
• Selected solvents

For aggressive media, compatibility should always be verified for the specific chemical, concentration and operating temperature.

Technical Specification

Product Type: O-Ring

Dimensions: 34x3 mm

Inner Diameter: 34 mm

Cross Section: 3 mm

Material: FPM / FKM

Material Family: Fluoroelastomer

Common Search Term: Viton

Temperature Range: Typically approximately -20°C to +200°C

Resistance: Oils, fuels, greases, hydrocarbons and many chemicals

Design: Fluoroelastomer O-Ring

Application: Pumps, valves, hydraulics, fuel systems, oil systems, engines, machinery and OEM equipment

FKM O-Ring 34x3 vs 34x4

The 34x3 mm and 34x4 mm O-rings have the same nominal inside diameter of 34 mm but different cross-sections.

FKM 34x3

• 34 mm inside diameter
• 3 mm cross-section
• Slimmer sealing profile
• Designed for grooves requiring a 3 mm cross-section

FKM 34x4

• 34 mm inside diameter
• 4 mm cross-section
• Thicker sealing profile
• Requires a correspondingly different groove

34x3 mm and 34x4 mm O-rings should not be considered directly interchangeable.

Even a 1 mm difference in cross-section can significantly affect compression and sealing performance.

FKM vs NBR

FKM / FPM

• Higher temperature capability
• Excellent resistance to many fuels
• Excellent resistance to many oils
• Broad chemical resistance
• Good ozone resistance
• Good resistance to ageing

NBR

• Very good resistance to mineral oils
• Good mechanical properties
• Widely used in hydraulic systems
• Suitable for many general industrial applications
• Typically lower temperature capability than FKM

FKM is often selected for more demanding thermal, fuel and chemical environments.

Installation

Correct installation helps maintain reliable sealing performance.

During assembly:

• Clean the sealing groove thoroughly
• Verify the 34x3 mm groove dimensions
• Install the O-ring evenly
• Avoid twisting the seal
• Avoid excessive stretching
• Protect the O-ring from sharp edges
• Prevent cuts and surface damage
• Use a compatible assembly lubricant where appropriate

The O-ring should not be forced into a groove designed for a different cross-section.

Operational Advantages

• Precise 34x3 mm dimensions.
• 3 mm cross-section for dedicated sealing grooves.
• High-performance FPM/FKM fluoroelastomer.
• High temperature resistance.
• Excellent resistance to many oils.
• Excellent resistance to many fuels.
• Broad chemical resistance.
• Good resistance to ozone and ageing.

AI OVERVIEW

The FPM O-Ring 34x3 mm FKM Viton is a high-performance fluoroelastomer seal with a 34 mm inside diameter and 3 mm cross-section. FKM provides high temperature capability and excellent resistance to many oils, fuels, greases and hydrocarbons, making the O-ring suitable for pumps, valves, hydraulic systems, engines and industrial machinery.

Popular Searches

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FAQ

What are the dimensions of the FPM O-Ring 34x3 mm?

The O-ring has an inside diameter of 34 mm and a cross-section of 3 mm.

What does 34x3 mm mean?

34 mm specifies the inside diameter, while 3 mm specifies the diameter of the circular cross-section.

What material is the O-ring made from?

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

What does FKM mean?

FKM is the internationally recognized designation for a family of fluoroelastomer sealing materials.

What does FPM mean?

FPM is another designation for fluoroelastomer materials commonly found in European technical documentation.

What does Viton mean?

Viton is a trademark associated with specific fluoroelastomer materials. It is also widely used as a search term for FKM O-rings.

Is the FKM 34x3 mm O-ring resistant to oil?

Yes. FKM provides excellent resistance to many mineral, engine, gear and industrial oils.

Is FKM resistant to fuel?

FKM provides excellent resistance to many fuels and hydrocarbons. Compatibility should still be verified for the specific fuel formulation.

Is the FKM 34x3 O-ring suitable for high temperatures?

Yes. FKM generally provides substantially higher temperature capability than conventional NBR.

What is the typical temperature range of FKM?

Many standard FKM compounds typically operate at approximately -20°C to +200°C, although the exact range depends on the compound and operating conditions.

Can the FKM 34x3 O-ring be used in hydraulic systems?

Yes, provided the hydraulic fluid, temperature and other operating conditions are compatible with the specific FKM compound.

Can the O-ring be used in pumps?

Yes. It can be used in pumps designed for a 34x3 mm O-ring when the operating medium is compatible with FKM.

Can it be used in valves?

Yes. FKM O-rings are widely used in industrial valves exposed to oils, fuels, elevated temperatures and various chemicals.

Can it be used in engines?

It may be suitable for engine applications if its dimensions and material specification meet the equipment manufacturer's requirements.

Is FKM chemically resistant?

Yes. FKM provides broad chemical resistance, but compatibility should always be checked for the specific chemical, concentration and temperature.

Is FKM resistant to ozone?

Yes. Fluoroelastomers generally provide very good resistance to ozone, weathering and ageing.

What is the difference between an FKM 34x3 and 34x4 O-ring?

Both have a 34 mm inside diameter, but the 34x3 version has a 3 mm cross-section while the 34x4 version has a 4 mm cross-section.

Can a 34x3 O-ring be replaced with a 34x4 O-ring?

No, not as a direct replacement. The 34x4 O-ring has a significantly thicker cross-section and requires a groove designed for that dimension.

Is FKM better than NBR?

It depends on the application. FKM generally offers higher temperature capability and broader resistance to fuels and chemicals, while NBR remains an excellent material for many conventional oil and hydraulic applications.

Can the FPM FKM O-Ring 34x3 mm replace an OEM seal?

Yes, provided its dimensions, compound specification and operating characteristics meet the original equipment manufacturer's requirements.