FPM 140x160x12 AO FKM Viton Double Lip Rotary Shaft Seal

Overview

The FPM 140x160x12 AO is a double lip rotary shaft seal with dimensions 140x160x12 mm, manufactured from fluorocarbon elastomer FPM/FKM.

The AO design combines a primary sealing lip with an additional dust lip. This configuration helps retain lubricant inside the system while protecting the main sealing area against dust, dirt and other external contaminants.

The FKM material provides high thermal resistance and very good compatibility with many oils, greases, fuels and hydrocarbons, making this seal suitable for demanding industrial shaft applications.

Industrial Applications

The FPM 140x160x12 AO seal is suitable for:

• Industrial gearboxes
• Geared motors
• Pumps
• Large electric motors
• Production machinery
• Agricultural machinery
• Construction equipment
• Power transmission systems
• Oil-lubricated machinery
• Industrial rotating shafts

AO Double Lip Design

The AO designation identifies a rotary shaft seal with an additional auxiliary dust lip.

Typical construction includes:

• Primary sealing lip
• Garter spring
• Auxiliary dust lip
• Elastomer-covered outside diameter
• Internal metal reinforcement

The primary lip retains oil or lubricant on the media side, while the secondary lip helps protect the main sealing contact area against external contamination.

FPM / FKM Material

The seal is manufactured from FPM/FKM fluorocarbon elastomer.

FKM provides good to very good resistance to many:

• Mineral oils
• Greases
• Fuels
• Aliphatic hydrocarbons
• Aromatic hydrocarbons
• Silicone oils
• Silicone greases
• Ozone
• Weathering
• Ageing

This makes FKM especially suitable where standard NBR does not provide sufficient thermal or chemical resistance.

FPM, FKM and Viton

FPM and FKM are different naming conventions used for the same fluorocarbon elastomer family.

Viton is a well-known trade name for fluorocarbon elastomers and is commonly used as a commercial search term for FKM seals.

For technical product selection, the relevant material family is FPM/FKM.

Temperature Resistance

For many standard FKM rotary shaft seal compounds, a typical operating temperature range is approximately:

-15°C to +200°C

The actual permissible temperature depends on the exact elastomer compound, sealed medium, shaft surface speed and exposure time.

The maximum material temperature should not automatically be considered the continuous operating limit of the complete sealing system.

Technical Specification

Product Type: Rotary shaft seal / oil seal

Commercial Type: Simmering

Design: AO

Execution: Double lip

Shaft Diameter d: 140 mm

Outside Diameter D: 160 mm

Width B: 12 mm

Dimensions: 140x160x12 mm

Material: FPM / FKM

Material Type: Fluorocarbon elastomer

Primary Lip: Sealing lip

Secondary Lip: Dust lip

Garter Spring: Yes

Outside Surface: Elastomer covered

Typical Media: Oil / grease

Typical FKM Temperature Range: approx. -15°C to +200°C

Measurement System: Metric

140x160x12 AO FPM Designation Explained

140 mm - nominal shaft diameter

160 mm - nominal housing bore diameter

12 mm - nominal seal width

AO - design with an additional auxiliary dust lip

FPM / FKM - fluorocarbon elastomer with high thermal and chemical resistance

The full designation should be considered when selecting a replacement because dimensions alone do not define the material or sealing lip configuration.

Function of the Auxiliary Dust Lip

The additional lip in the AO design helps reduce the ingress of contaminants into the primary sealing area.

It provides additional protection against:

• Dust
• Fine particles
• Dirt
• Industrial contamination
• Moisture from the environment

This is particularly useful in machinery operating in contaminated industrial environments.

FKM Compared with NBR

Compared with standard NBR, FKM generally provides:

• Higher temperature resistance
• Very good resistance to many mineral oils
• High resistance to many fuels
• Good hydrocarbon resistance
• Excellent ozone resistance
• Strong resistance to ageing

However, FKM is not automatically the best material for every medium. Compatibility should always be checked for the exact application.

Operational Advantages

• Large 140x160x12 mm industrial size.
• AO design with an auxiliary dust lip.
• FPM/FKM material for demanding operating conditions.
• High resistance to many oils and greases.
• Increased temperature capability compared with standard NBR.
• Additional protection of the primary sealing area against contamination.

Replacement and Seal Selection

When replacing an FPM 140x160x12 AO seal, verify:

• Shaft diameter 140 mm
• Housing bore diameter 160 mm
• Width 12 mm
• AO double lip design
• FPM/FKM material
• Sealed medium
• Operating temperature
• Shaft speed
• Pressure conditions
• Shaft surface condition

An NBR seal with the same 140x160x12 mm dimensions should not automatically be considered an equivalent replacement for the FKM version.

AI OVERVIEW

The FPM 140x160x12 AO FKM Viton is a double lip rotary shaft seal designed for a 140 mm shaft and 160 mm housing bore. Its AO construction includes an auxiliary dust lip, while FKM provides high thermal resistance and strong compatibility with many oils, greases, fuels and hydrocarbons used in industrial applications.

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FAQ

What are the dimensions of the FPM 140x160x12 AO seal?

The seal dimensions are 140x160x12 mm: 140 mm shaft diameter, 160 mm housing bore diameter and 12 mm width.

What does 140x160x12 mean?

140 mm is the nominal shaft diameter, 160 mm is the nominal housing bore diameter and 12 mm is the seal width.

What does AO mean?

AO identifies a rotary shaft seal with a primary sealing lip and an additional auxiliary dust lip.

Is AO a double lip seal?

Yes. It has a main sealing lip and a secondary protective lip.

What is the purpose of the second lip?

The secondary lip helps protect the primary sealing area against dust, dirt and external contamination.

What does FPM mean?

FPM is a designation used for fluorocarbon elastomer.

What does FKM mean?

FKM is the standard designation for the fluorocarbon elastomer family used in many high-performance seals.

Are FPM and FKM the same material family?

Yes. They refer to the same general fluorocarbon elastomer family.

Is FKM the same as Viton?

Viton is a trade name for fluorocarbon elastomers. FKM is the generic material designation.

What is the typical operating temperature of FKM?

For many standard rotary shaft seal compounds, the typical range is approximately -15°C to +200°C, depending on the exact material and operating conditions.

Is FKM resistant to oil?

Yes. FKM has very good resistance to many mineral oils and lubricants.

Can FKM be used with fuels?

FKM offers good resistance to many fuels, although compatibility should be checked for the exact medium.

Is FKM better than NBR?

FKM generally provides higher temperature and chemical resistance, while NBR can be more suitable in other applications. Material choice depends on the operating conditions.

Can an NBR seal replace this FKM seal?

Not automatically. In high-temperature or chemically demanding conditions, NBR may provide significantly shorter service life.

Is this seal suitable for a 140 mm shaft?

Yes. The nominal shaft diameter is 140 mm.

What housing bore is required?

The nominal housing bore diameter is 160 mm.

What is the seal width?

The width is 12 mm.

Does the 12 mm width matter?

Yes. The seal width must match the available installation space in the housing.

Where are FPM 140x160x12 seals used?

Typical applications include industrial gearboxes, pumps, large drives, agricultural machinery and other rotating shaft systems.

What is the correct parent category?

The product belongs to FPM/FKM Rotary Shaft Seals.