O-ring FPM 36.27x1.78 FKM Viton

Technical specifications

The nominal outside diameter of 39.83 mm is calculated from the specified dimensions: 36.27 mm + 2 x 1.78 mm.

FKM/FPM identifies the general elastomer family but does not establish the exact rubber compound.

Viton is a registered trade name for certain fluoroelastomers. Without manufacturer documentation, the use of genuine Viton-branded material cannot be independently confirmed.

The manufacturer, Shore A hardness, dimensional tolerance class, operating temperature range, certifications and packaging quantity have not been specified.

What does O-ring FPM 36.27x1.78 FKM Viton mean?

The designation identifies the sealing ring type, nominal dimensions and elastomer family.

• O-ring - a continuous sealing ring with a circular cross-section.

• FPM - a designation for fluorocarbon rubber used in elastomer terminology.

• 36.27 mm - nominal inside diameter of the sealing ring.

• 1.78 mm - nominal cross-sectional diameter.

• FKM - internationally recognized designation for the fluoroelastomer material family.

• Viton - a trade name for certain fluoroelastomers, frequently associated with FKM sealing materials.

FKM and FPM refer to the same general family of fluorocarbon elastomers. However, individual compounds may differ significantly in chemical resistance, mechanical properties and temperature capability.

Construction and FKM/FPM material properties

The O-ring 36.27x1.78 mm features a continuous, one-piece elastomeric construction with a circular cross-section.

Sealing is achieved through controlled compression of the elastomer between mating surfaces. The compressed material generates contact pressure that helps prevent leakage through the sealing connection.

FKM belongs to the family of fluorocarbon elastomers commonly used in demanding industrial sealing applications.

Typical properties of appropriately selected FKM compounds include:

• Resistance to many mineral and synthetic oils.

• Resistance to numerous fuels and hydrocarbons.

• Higher resistance to elevated temperatures than standard NBR compounds.

• Good resistance to ozone and atmospheric exposure.

• Resistance to many chemicals, depending on the specific compound.

FKM is not universally resistant to all chemicals.

Particular caution is required with ketones, certain amines, esters, hot water and steam, depending on the elastomer formulation.

Actual chemical compatibility and service life depend on the specific compound and operating conditions.

O-ring FKM/FPM compared with NBR and EPDM

Identical nominal dimensions do not guarantee material interchangeability.

Typical applications

FKM O-rings with this dimensional profile may be used in appropriately designed:

• Static sealing connections in industrial installations.

• Valve bodies and industrial fluid control components.

• Equipment operating with compatible oils and fuels.

• Hydraulic systems using suitable working fluids.

• Technical equipment housings and covers.

• Sealing connections requiring increased chemical or temperature resistance.

These are typical application areas for FKM sealing materials, not verified OEM applications of this specific O-ring.

Dynamic sealing applications require additional assessment of friction, lubrication, operating speed, groove geometry and wear conditions.

Selection and interchangeability

Before selecting the O-ring FPM 36.27x1.78 FKM Viton, verify the following parameters:

• Nominal inside diameter of 36.27 mm.

• Cross-sectional diameter of 1.78 mm.

• Dimensional tolerances.

• Installation groove dimensions and geometry.

• Chemical compatibility with the sealed medium.

• Operating temperature and pressure.

• Required elastomer hardness.

• Static or dynamic sealing conditions.

• Requirements for the specific FKM compound.

Sealing rings with identical nominal dimensions may differ in hardness, chemical resistance, compression set and dimensional tolerances.

The FKM material designation alone does not guarantee complete technical interchangeability.

Alternative designations and search references

Common alternative representations of the same nominal dimensions and material family include:

• O-ring FPM 36.27x1.78 FKM Viton

• O-ring FKM 36.27x1.78 mm

• FKM O-ring 36.27x1.78

• FPM O-ring 36.27x1.78 mm

• Fluorocarbon rubber O-ring 36.27x1.78

• Viton O-ring 36.27x1.78

• O-ring 36,27x1,78 FKM

These are alternative descriptive designations, not verified manufacturer part numbers, OEM references or confirmed cross-reference numbers.

The term Viton does not independently confirm the origin or brand certification of the elastomer.

Installation and handling

Before installation, thoroughly clean the sealing groove and mating surfaces.

Avoid sharp edges, burrs and tools that could cut or damage the elastomer.

The ring should be positioned uniformly in the groove without twisting or excessive stretching.

Where assembly lubrication is required, use a lubricant compatible with the specific FKM compound and the operating medium.

Store the sealing ring in a clean, dry environment protected from contamination, excessive heat and prolonged mechanical deformation.

FAQ - Frequently asked questions

1. What are the dimensions of the O-ring FPM 36.27x1.78 FKM Viton?

The nominal inside diameter is 36.27 mm, the cross-sectional diameter is 1.78 mm, and the calculated nominal outside diameter is 39.83 mm.

2. Do FPM and FKM refer to the same material?

Yes. Both designations refer to the general family of fluorocarbon elastomers. However, individual FKM compounds can differ in chemical resistance, mechanical properties and temperature capability.

3. Are FKM and Viton exactly the same?

No. FKM is a generic elastomer family designation, while Viton is a trade name for certain fluoroelastomers. Not every FKM sealing ring is manufactured from genuine Viton-branded material.

4. Is an FKM O-ring resistant to oils and fuels?

Many FKM compounds provide good resistance to oils and fuels. Compatibility must be verified for the specific fluid formulation, concentration and operating temperature.

5. What is the operating temperature range of the O-ring FPM 36.27x1.78?

The operating temperature range of this specific sealing ring cannot be reliably established without information about the exact FKM compound. Different formulations may have different temperature limitations.

6. Can an NBR O-ring be replaced with an FKM O-ring of the same dimensions?

Not automatically. NBR and FKM differ in chemical resistance, hardness, flexibility and temperature-dependent performance. Substitution requires technical evaluation.

7. Is the O-ring 36.27x1.78 FKM suitable for hydraulic applications?

It may be suitable for appropriately designed hydraulic sealing connections, provided the compound is compatible with the hydraulic fluid and the operating pressure, temperature and groove geometry are acceptable.

8. Is FKM resistant to water and steam?

Resistance depends on the specific FKM formulation. Standard fluoroelastomers may have limited suitability for prolonged exposure to hot water and steam. Specially formulated compounds may provide improved performance.

O-ring FPM 36.27x1.78 FKM Viton - key information

The O-ring FPM 36.27x1.78 FKM Viton is an elastomeric sealing ring with a 36.27 mm inside diameter and 1.78 mm cross-section, manufactured from fluorocarbon rubber (FKM/FPM). This material family is used in sealing applications requiring resistance to many oils, fuels and elevated temperatures. Proper selection requires verification of the specific compound, chemical compatibility and operating conditions.

The product is offered through the specialist B2B industrial trading platform simmering.pl, serving industrial companies, technical purchasing departments and maintenance operations, with worldwide shipping from stock in Poland.