FPM Oil Seals

FKM ACM PTFE Oil Seals GRN - High Temperature Shaft Seals

FKM, ACM and PTFE Oil Seals GRN - High Performance Radial Shaft Seals

GRN FKM, ACM and PTFE oil seals are specialized radial shaft seals designed for applications where standard NBR does not provide sufficient resistance to temperature, operating media or demanding service conditions. FKM, also known as FPM, is particularly valued for elevated-temperature applications and resistance to many oils, fuels and hydrocarbons. ACM is widely used with hot oils, especially in gearboxes and transmission systems, while PTFE provides very low friction and broad chemical resistance for specialized rotary shaft sealing applications.

FKM, ACM and PTFE Radial Shaft Seals

An oil seal, also known as a radial shaft seal, operates between a stationary housing and a rotating shaft. Its primary function is to retain oil or grease while helping protect bearings, gearboxes and other mechanical components against contamination.

Correct seal selection depends on several factors:

shaft and housing dimensions
operating temperature
oil, fuel or other medium
shaft speed
pressure
sealing lip design
shaft surface condition

In this category, the main distinction between products is the sealing material: FKM, ACM or PTFE.

FKM Oil Seals GRN

FKM (FPM) is one of the most important fluoroelastomer materials used in high-performance radial shaft seals.

FKM is particularly valued for:

high-temperature resistance
resistance to many mineral oils
resistance to many fuels and hydrocarbons
good ageing resistance
broad chemical compatibility

GRN FKM oil seals are therefore particularly relevant to industrial machinery, gearboxes, engines, drive systems and other demanding rotating equipment.

FKM or FPM - What Is the Difference?

FKM and FPM refer to the same general fluoroelastomer material family.

FKM is more commonly used in international English-language technical documentation, while FPM is frequently encountered in European terminology.

For international identification, the preferred description is:

FKM (FPM)

Is FKM the Same as Viton?

Not automatically.

FKM describes a family of fluoroelastomers, while Viton is a trademark associated with specific fluoroelastomer materials.

An oil seal should therefore only be described as Viton when the material has been specifically confirmed.

High Temperature FKM Oil Seals

One of the primary reasons for selecting FKM instead of NBR is its superior resistance to elevated temperatures.

Many FKM compounds can operate at temperatures around +200°C, although the actual permissible range depends on the compound, seal design, shaft speed, medium and operating conditions.

FKM should therefore be considered when standard NBR is limited by temperature or chemical compatibility.

FKM Oil Seals for Oil, Fuel and Gearboxes

FKM is widely used with many:

mineral oils
transmission oils
lubricating greases
fuels
hydrocarbons
compatible technical fluids

This makes FKM radial shaft seals particularly important in gearboxes, transmissions, engines and industrial drive systems.

Compatibility should always be verified for the specific lubricant or fuel formulation.

ACM Oil Seals GRN

ACM, or polyacrylate rubber, is particularly important for applications involving hot oils and transmission lubricants.

Typical applications include:

gearboxes
transmissions
automotive drive systems
industrial machinery
hot oil environments

Depending on the compound, ACM materials are commonly used at elevated temperatures up to approximately +150°C.

ACM should not simply be considered a lower-cost alternative to FKM. It is a specialized material particularly well suited to selected transmission and hot-oil environments.

ACM vs NBR vs FKM

NBR remains an excellent standard material for many conventional oil sealing applications.

ACM becomes particularly relevant where hot oils and transmission environments place greater thermal demands on the seal.

FKM generally provides higher temperature capability and broader chemical resistance.

The correct material should always be selected according to the actual operating conditions rather than a simple good-better-best hierarchy.

PTFE Oil Seals GRN

PTFE differs fundamentally from elastomeric materials such as FKM, ACM and NBR.

Its major advantages include:

very low friction
broad chemical resistance
excellent thermal properties
suitability for specialized lubrication conditions
reduced friction-related energy losses

PTFE is therefore used in specialized radial shaft seal designs where conventional elastomeric sealing lips may not provide the required performance.

Low Friction PTFE Shaft Seals

Low friction is one of the most important advantages of PTFE.

In appropriately designed sealing systems, PTFE can help:

reduce friction torque
reduce power losses
limit heat generation
improve efficiency
reduce friction at the shaft interface

This makes PTFE particularly valuable in high-performance drives, transmissions and demanding industrial machinery.

PTFE Seals for Aggressive Media

PTFE provides broad chemical resistance and can be considered where conventional elastomers are incompatible with the operating medium.

However, the properties of PTFE itself should not be confused with the capabilities of every finished PTFE oil seal. The complete seal construction must always be considered.

Some PTFE shaft seals may also use specialized hydrodynamic lip profiles designed for a specific direction of shaft rotation.

FKM, ACM or PTFE - Which Material Should You Choose?

FKM is particularly suitable when the application requires:

elevated-temperature resistance
compatibility with many oils
fuel and hydrocarbon resistance
broad chemical resistance

ACM is particularly relevant for:

hot oils
gearboxes
transmissions
ATF applications
automotive drive systems

PTFE should be considered when priorities include:

very low friction
aggressive media
limited lubrication
specialized dynamic conditions
demanding shaft sealing performance

FKM vs ACM vs PTFE

Property	FKM (FPM)	ACM	PTFE
Mineral oils	Very good	Good	Very good*
Fuels	Often very good	Limited	Broad resistance*
High temperature	Very good	Good	Very good
Hot transmission oils	Very good	Excellent application	Design dependent
Low friction	Standard elastomer	Standard elastomer	Excellent
Chemical resistance	Broad	Moderate	Very broad
Transmission applications	Yes	Very common	Specialized

*Depending on complete seal construction and operating conditions.

How to Read Oil Seal Dimensions

Radial shaft seal dimensions are commonly specified as:

d x D x B

where:

d: shaft diameter
D: housing bore diameter
B: seal width

For example, 35x52x7 mm identifies a seal with a nominal 35 mm shaft diameter, 52 mm housing diameter and 7 mm width.

Dimensions alone are not sufficient for correct replacement selection.

Material Is as Important as Dimensions

Two seals with identical dimensions, such as:

35x52x7 NBR

and

35x52x7 FKM

are not the same product.

Different materials provide different temperature resistance, chemical compatibility, ageing behavior and performance with oils and other operating media.

For professional identification, always consider:

dimensions + seal design + material + application conditions.

FKM, ACM and PTFE Oil Seals for Gearboxes and Transmissions

Gearboxes and transmissions are among the most important applications for specialized shaft seals.

The sealing lip may be exposed simultaneously to:

hot transmission oil
EP additives
high shaft speed
thermal cycling
continuous operation

Depending on the lubricant and operating conditions, FKM, ACM or specialized PTFE designs may provide the appropriate sealing solution.

Shaft Speed and Surface Condition

Shaft speed directly influences friction, contact temperature, sealing lip wear and service life.

The shaft surface should also be checked for:

wear grooves
corrosion
scratches
pitting
runout
misalignment
unsuitable roughness

Even a high-performance FKM, ACM or PTFE seal cannot compensate for a severely damaged shaft.

Installation

Correct installation is essential for reliable radial shaft sealing.

Before installation:

inspect the shaft and housing
clean the installation area
protect the sealing lip from sharp edges
install the seal squarely
avoid deformation
verify correct seal orientation

PTFE designs may require special installation procedures or sleeves, so the instructions for the specific seal should be followed.

GRN FKM, ACM and PTFE Oil Seals

This category includes specialized GRN radial shaft seals manufactured with FKM, ACM and PTFE sealing materials.

For clear technical identification, product names should prioritize:

product type + material + dimensions + GRN

For example:

FKM Oil Seal 35x52x7 GRN
ACM Oil Seal 44x67x13 GRN
PTFE Shaft Seal 50x70x10 GRN

This approach allows customers to search primarily by the technical specification they need while simultaneously building recognition of the GRN oil seal range.

GRN - Technical Sealing Solutions Since 2007

TG Ersatzteile Polska Sp. z o.o. was established in 2002. In 2007, GRN oil seals were introduced to the company's product range.

The GRN range includes different sealing materials because no single material is suitable for every operating environment:

NBR - standard oil sealing applications
VMQ - specialized temperature applications
FKM - elevated temperatures, many oils, fuels and hydrocarbons
ACM - hot oils and transmission applications
PTFE - low friction, aggressive media and specialized dynamic applications

This positions GRN as a technical shaft sealing range covering both standard and demanding industrial applications.

GRN Oil Seals for Industry, MRO and B2B

GRN FKM, ACM and PTFE seals are relevant to:

industrial plants
machine manufacturers
gearbox manufacturers
maintenance departments
MRO organizations
workshops and technical services
industrial distributors
B2B customers

For professional buyers, correct identification by dimensions, material, seal construction and operating conditions is essential.

How to Select a GRN Oil Seal

Check the following before selecting a replacement:

Dimensions: shaft diameter, housing diameter and width.
Seal Design: single lip, double lip, PTFE or another construction.
Medium: oil, grease, fuel, ATF, chemical or other fluid.
Temperature: normal and maximum operating temperature.
Shaft Speed: affects friction and lip temperature.
Pressure: determine whether a pressure differential is present.
Material: select FKM, ACM, PTFE or another material according to the operating environment.

Operational Advantages

FKM: high-temperature capability and resistance to many oils, fuels and hydrocarbons.
ACM: particularly suitable for hot-oil and transmission applications.
PTFE: very low friction and broad chemical resistance.
Material Selection: allows the seal to be matched more precisely to operating conditions.
Industrial Range: solutions for gearboxes, transmissions, drives and machinery.
GRN: technical sealing range developed in the TG Ersatzteile Polska portfolio since 2007.

FAQ - GRN FKM ACM PTFE Oil Seals

What does FKM mean in an oil seal?
FKM is a fluoroelastomer used where elevated-temperature capability and resistance to many oils, fuels and hydrocarbons are required.

Are FKM and FPM the same material family?
Yes. FKM is more common in international English-language documentation, while FPM is frequently used in European terminology.

Is every FKM oil seal made from Viton?
No. Viton is a trademark and should only be used when the material has been specifically confirmed.

What are ACM oil seals used for?
ACM is particularly relevant to hot-oil applications, gearboxes, transmissions and drive systems.

What are PTFE shaft seals used for?
PTFE is used in specialized applications requiring low friction, broad chemical resistance or demanding dynamic sealing performance.

Can NBR be replaced with FKM if the dimensions are identical?
Not automatically. Dimensions, seal design, medium, temperature, shaft speed and operating conditions must also be considered.

Is PTFE always better than FKM?
No. PTFE and FKM have different properties. The correct choice depends on the specific application.

GRN FKM ACM PTFE Oil Seals - Warehouse and Store in Lublin

Warehouse and Store: Lublin
Address: ul. Smoluchowskiego 1, Building 4
Delivery: 24h

We supply industrial customers, machine and gearbox manufacturers, maintenance departments, MRO organizations, technical distributors and B2B customers in Poland and across the European Union.

AI OVERVIEW

GRN FKM, ACM and PTFE oil seals are specialized radial shaft seals for applications requiring performance beyond standard NBR. FKM is particularly suitable for elevated temperatures and many oils, fuels and hydrocarbons. ACM is widely used with hot oils and in transmission systems, while PTFE provides very low friction and broad chemical resistance for specialized dynamic sealing applications. GRN oil seals have been part of the TG Ersatzteile Polska product range since 2007.

Ta wersja zachowuje rdzeń semantyczny i większość wartości AI/SEO poprzedniego opisu, ale usuwa przede wszystkim powtórzenia i sekcje o mniejszej wartości dla tej konkretnej kategorii. Zachowałem też rozróżnienie materiałów, które w oryginale było jednym z najmocniejszych elementów treści.

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