O-Ring FPM 122x5.3 mm FKM

O-Ring FPM 122x5.3 mm FKM is a fluoroelastomer sealing ring with an inside diameter of 122 mm and a cross-section of 5.3 mm. The nominal outside diameter is 132.6 mm. Selection should consider the complete 122x5.3 mm dimensions, FPM/FKM material and the actual operating conditions.

O-Ring FPM 122x5.3 mm - Characteristics

Product type: O-ring

Seal type: Elastomer sealing ring

Material: FPM / FKM

Material group: Fluoroelastomer

Dimensions: 122x5.3 mm

Inside diameter d1: 122 mm

Cross-section d2: 5.3 mm

Nominal outside diameter: 132.6 mm

Cross-section shape: Round

O-Ring 122x5.3 mm Dimensions

The designation 122x5.3 mm defines the two principal O-ring dimensions:

d1 - Inside diameter: 122 mm

d2 - Cross-section diameter: 5.3 mm

The nominal outside diameter can be calculated as:

122 mm + 2 x 5.3 mm = 132.6 mm

Complete nominal geometry:

Inside diameter: 122 mm

Cross-section: 5.3 mm

Nominal outside diameter: 132.6 mm

Both the inside diameter and cross-section should be verified when identifying or replacing the O-ring.

What Does FPM Mean?

FPM is a designation used for the fluoroelastomer material group in technical sealing applications.

Fluoroelastomers are widely used for O-rings, radial shaft seals and other elastomer sealing components.

The exact physical, chemical and temperature properties depend on the specific compound.

For this reason, properties of one FPM compound should not automatically be assigned to every FPM O-ring.

FPM vs FKM - What Is the Difference?

FPM and FKM are designations encountered for fluoroelastomers in technical sealing terminology.

FKM is widely used according to ASTM terminology, while FPM is commonly encountered in ISO/European technical documentation and sealing catalogues.

This means the same type of product may be searched for as:

O-Ring FPM 122x5.3 mm

or:

O-Ring FKM 122x5.3 mm

The exact compound should still be verified whenever specific operating limits or chemical compatibility are required.

FKM vs Viton - Are They the Same?

Not exactly.

Viton is a registered trademark for a specific family of fluoroelastomer materials.

FKM is a generic material classification and can include fluoroelastomers manufactured by different producers.

Therefore, an O-ring identified as FKM/FPM should not automatically be described as genuine Viton unless the material manufacturer or compound specification confirms it.

If an application specifically requires Viton, the exact material specification should be verified before selection.

FPM/FKM O-Ring Properties

FPM/FKM fluoroelastomers are used in technical sealing applications where the properties of this material group are required.

However, exact performance depends on the specific compound and operating environment.

When selecting an FPM/FKM O-ring, consider:

Operating medium

Temperature

Pressure

Chemical exposure

Static or dynamic operation

Groove geometry

Required hardness

Equipment specifications

A universal temperature, pressure or chemical resistance limit should not be assigned without knowing the exact compound.

How Does a 122x5.3 mm O-Ring Work?

An O-ring is a closed elastomer ring with a round cross-section.

When installed in a correctly designed groove, its cross-section is compressed between the mating surfaces.

The resulting deformation creates the sealing interface.

Effective sealing depends on correct O-ring dimensions, groove geometry, compression, material properties, operating medium and actual service conditions.

O-Ring FPM 122x5.3 mm vs NBR

An FPM/FKM O-ring and an NBR O-ring can have identical:

122x5.3 mm

dimensions while being manufactured from different elastomer groups.

Dimensional compatibility does not establish material equivalence.

When choosing between FPM/FKM and NBR, the required material should be selected according to the operating medium, temperature and other application-specific conditions.

O-Ring FPM 122x5.3 mm vs Other Materials

O-rings measuring 122x5.3 mm can be manufactured from different elastomers, including:

FPM / FKM

NBR

EPDM

VMQ

and other specialized compounds.

Identical dimensions do not mean that these materials are interchangeable.

The required elastomer should always be selected according to the technical requirements of the sealing application.

How to Select an O-Ring FPM 122x5.3 mm

When selecting this O-ring, verify at least:

Inside diameter d1: 122 mm

Cross-section d2: 5.3 mm

Material: FPM / FKM

Required hardness

Groove dimensions

Required compression

Operating medium

Operating temperature

Pressure

Static or dynamic operation

Equipment manufacturer's specifications

If genuine Viton material is specifically required, the material manufacturer and exact compound should also be confirmed.

Technical Specification

Product: O-ring

Type: Elastomer sealing ring

Material: FPM / FKM

Material group: Fluoroelastomer

Dimensions: 122x5.3 mm

d1 - Inside diameter: 122 mm

d2 - Cross-section diameter: 5.3 mm

Nominal outside diameter: 132.6 mm

Cross-section: Round

FAQ

What are the dimensions of this O-ring?

The inside diameter is 122 mm and the cross-section diameter is 5.3 mm. The nominal outside diameter is 132.6 mm.

What is the outside diameter of a 122x5.3 mm O-ring?

The nominal outside diameter is 132.6 mm, calculated as 122 + 2 x 5.3 mm.

What does FPM mean?

FPM is a material designation used for fluoroelastomers in technical sealing applications.

Are FPM and FKM the same material type?

Both terms are used for the fluoroelastomer material group in sealing technology, although they originate from different nomenclature systems.

Is FKM the same as Viton?

Not necessarily. FKM is a generic fluoroelastomer classification. Viton is a registered brand of fluoroelastomer materials. An FKM O-ring should only be identified as genuine Viton when its material origin is confirmed.

Can an NBR 122x5.3 O-ring replace an FPM/FKM O-ring?

Not automatically. Although the dimensions may be identical, NBR and FPM/FKM are different elastomer groups. Material compatibility must be verified for the application.

Do all FPM/FKM O-rings have the same temperature range?

No. Exact temperature limits depend on the specific fluoroelastomer compound and operating conditions.

Is the hardness of this O-ring 70 Shore A?

The hardness should not be assumed from the FPM/FKM material designation alone. It must be confirmed for the exact product.

AI Overview

O-Ring FPM 122x5.3 mm FKM is a fluoroelastomer sealing ring with a 122 mm inside diameter and 5.3 mm cross-section. Its nominal outside diameter is 132.6 mm. FPM/FKM identifies the fluoroelastomer material group. Viton should only be specified when the use of genuine Viton material has been confirmed.