Rubber Seals & O-Rings
HNBR O-Rings & Seals
Seals and O-rings in HNBR, a hydrogenated nitrile compound. HNBR is used predominantly for cold medium sealing, where its composition keeps it performing in colder environments, and it is widely used in automotive applications from power steering pipes to oil seals.
- HNBR hydrogenated nitrile rubber
Product Overview
Seals and O-rings in HNBR, a hydrogenated nitrile compound. HNBR is used predominantly for cold medium sealing, where its composition keeps it performing in colder environments, and it is widely used in automotive applications from power steering pipes to oil seals. Beyond automotive it is found in packer and screw pumps and in general O-ring duty where nitrile alone is not durable enough.
Key Benefits
- Performs in cold medium sealing where standard nitrile stiffens
- Retains the oil resistance of nitrile with better durability
- Proven in automotive power steering and oil seal applications
- Suited to packer and screw pump duty
- Available as O-rings and moulded seals
Problems It Solves
- Nitrile seals hardening and leaking in cold conditions
- Seal life too short in demanding automotive applications
- Pump seals failing under continuous duty
- Compound choice made without regard to the operating temperature
Where It Is Used
Applications And Buyers
Application Scenarios
- Power steering pipe seals in vehicles
- Automotive oil seals
- Packer and screw pump sealing
- Cold medium sealing in industrial equipment
Who It Is For
- Automotive component manufacturers
- Pump manufacturers
- Equipment builders working in cold environments
- Buyers whose NBR seals are failing prematurely
Technical Features And Specifications
Technical Features
- HNBR hydrogenated nitrile compound
- Predominantly used for cold medium sealing
- Automotive grade durability
- Supplied as O-rings and moulded seals
- Custom profiles to drawing
| Material | HNBR (hydrogenated nitrile rubber) |
|---|---|
| Key Application | Cold medium sealing |
| Automotive Uses | Power steering pipes, oil seals |
| Industrial Uses | Packer and screw pumps, O-rings |
| Supply Basis | Standard and custom sizes |
How It Is Made And Checked
Materials Process And Quality Control
Materials
- HNBR hydrogenated nitrile rubber
Manufacturing Process
- Compression moulding
- Injection moulding
- Trimming
- 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
- O-ring or moulded seal profile
- Size to standard series or to drawing
- Hardness for the pressure and groove
- Compound grade for the temperature range
- Quantities from sample to production batches
Compared With The Alternatives
| NBR O-rings | HNBR keeps nitrile's oil resistance while performing better in cold conditions and lasting longer under demanding duty, at a higher price. |
|---|---|
| FKM seals | FKM leads on high temperature and chemical resistance; HNBR is the better answer where cold performance and mechanical durability matter more. |
Use Guide
- Specify HNBR where the medium is cold and a nitrile seal has previously hardened
- Give the full temperature range, not just the maximum
- Send the groove dimensions with the enquiry
- Keep the compound consistent across a product family for spares simplicity
Questions
Questions Buyers Ask About This Product
What is HNBR used for?
Predominantly cold medium sealing, plus automotive applications such as power steering pipes and oil seals.
How does it differ from NBR?
It keeps the oil resistance of nitrile but performs better in colder environments and lasts longer in demanding duty.
Do you supply moulded seals as well as O-rings?
Yes, both HNBR O-rings and HNBR moulded seals.
Is it suitable for pump applications?
Yes, it is used in packer and screw pumps.
Can you make a custom profile?
Yes, to your drawing. Send the dimensions and operating conditions.
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Get A Price For HNBR O-Rings & Seals
Send the duty figures, the material if it is fixed, and the quantity. We will confirm the specification and quote against it.