Rubber Seals & O-Rings
FKM & FFKM O-Rings
O-rings in FKM fluoroelastomer and FFKM perfluoroelastomer. FKM gives strong resistance across a wide range of chemicals and temperatures, including petroleum products, hydraulic fluids and acidic compounds.
- FKM fluoroelastomer
- FFKM perfluoroelastomer
Product Overview
O-rings in FKM fluoroelastomer and FFKM perfluoroelastomer. FKM gives strong resistance across a wide range of chemicals and temperatures, including petroleum products, hydraulic fluids and acidic compounds. FFKM goes further, withstanding even the most aggressive chemicals, which is why it is specified in semiconductor manufacturing and chemical processing where a seal failure is far more expensive than the seal.
Key Benefits
- FKM resists petroleum products, hydraulic fluids and acidic compounds
- FFKM offers almost universal chemical resistance
- Both compounds hold up at temperatures where nitrile fails
- Used in reactors, mixers and transfer systems in chemical processing
- Two grades in one range so the specification can be matched to the consequence of failure
Problems It Solves
- Seals degrading in aggressive chemicals and causing unplanned shutdowns
- Compounds that cannot hold up at the process temperature
- Contaminated batches caused by seal breakdown
- Over specification of FFKM where FKM would be sufficient
Where It Is Used
Applications And Buyers
Application Scenarios
- Seals for reactors, mixers and transfer systems in chemical processing
- Semiconductor manufacturing equipment
- High temperature hydraulic and fuel systems
- Aggressive media where standard compounds degrade
Who It Is For
- Chemical processing plants
- Semiconductor equipment manufacturers
- Oil, gas and petrochemical operators
- Engineers replacing seals that keep failing on chemical attack
Technical Features And Specifications
Technical Features
- FKM fluoroelastomer compound
- FFKM perfluoroelastomer compound
- Resistance to petroleum products, hydraulic fluids and acidic compounds
- High temperature capability
- Precision engineered to size
| Materials | FKM fluoroelastomer, FFKM perfluoroelastomer |
|---|---|
| FKM Resistance | Wide chemical and temperature range including petroleum, hydraulic fluid and acids |
| FFKM Resistance | Aggressive chemicals, close to universal chemical resistance |
| Typical Industries | Chemical processing, semiconductor manufacturing |
| Supply Basis | Standard series and custom sizes |
How It Is Made And Checked
Materials Process And Quality Control
Materials
- FKM fluoroelastomer
- FFKM perfluoroelastomer
Manufacturing Process
- Compression moulding
- Post curing
- Inspection
Quality Control
- Specification agreed in writing before production starts
- First article or sample approved against the agreed specification
- Goods inspected and photographed at the factory before loading
- Inspection report sent to you before the container sails
Customisation Options
What Can Be Varied
- FKM or FFKM compound by chemical exposure
- Size to standard series or to drawing
- Hardness for the pressure and groove
- Post cure specification for high purity applications
- Packaging for cleanroom use where required
Compared With The Alternatives
| FKM versus FFKM | FKM covers a wide chemical and temperature range at moderate cost; FFKM is for the most aggressive media and highest temperatures, and its price only makes sense where a failure is expensive. |
|---|---|
| NBR O-rings | Nitrile is far cheaper and fine in oils and fuels, but degrades in aggressive chemicals and at elevated temperatures where FKM and FFKM keep working. |
Use Guide
- List every chemical the seal will contact, including cleaning agents
- Specify FFKM where a failure means a contaminated batch or a shutdown, not everywhere
- Give the peak temperature as well as the normal operating temperature
- Confirm whether a post cure is required for your application
Questions
Questions Buyers Ask About This Product
What does FFKM stand for?
Perfluoroelastomer. It offers close to universal chemical resistance, which is why it is used in semiconductor and chemical processing applications.
When is FKM the better choice?
Whenever its chemical and temperature range covers the application. It resists petroleum products, hydraulic fluids and acidic compounds at a fraction of FFKM's cost.
Where are these O-rings used?
In seals for reactors, mixers and transfer systems in chemical processing, and in semiconductor manufacturing among others.
Can you supply custom sizes?
Yes. Send the groove dimensions and the chemicals and temperatures involved.
Is FFKM worth the price difference?
It is where a failed seal means a contaminated batch, a chemical release or a shutdown. For routine duty, FKM usually makes more sense.
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Guides And Industries That Cover This
Get A Price For FKM & FFKM O-Rings
Send the duty figures, the material if it is fixed, and the quantity. We will confirm the specification and quote against it.