NBR O-rings are vital in sealing systems exposed to oil, fuel, and pressure. Learn why they remain an industrial favorite and how to choose the best ones for your applications.

NBR (nitrile rubber) offers excellent resistance to petroleum-based substances, making it ideal for automotive, hydraulic, and pneumatic systems.

Let’s explore real-world questions to help you make a smart choice.

What are NBR O-rings used for?

NBR O-rings are used in systems that demand high oil and fuel resistance.

They are found in automotive fuel systems, hydraulic cylinders, pneumatic valves, and general industrial equipment. Their popularity stems from their reliability, affordability, and performance under pressure.

👉 Explora nuestra Página del producto de junta tórica NBR for custom sizes and specs.

What is the temperature range of NBR O-rings?

NBR O-rings operate from -40°C to 120°C, depending on the formulation.

This range suits most industrial environments. For higher temperature sealing, consider switching to Juntas tóricas de FKM.

Are NBR O-rings resistant to chemicals?

Yes—for petroleum-based oils and fuels, NBR offers strong resistance.

However, it performs poorly against ozone, ketones, and strong acids. For broader chemical resistance, refer to our FKM vs. NBR guide.

Can NBR O-rings be used in food processing?

No—standard NBR isn’t FDA-approved for direct food contact.

For food-safe sealing, choose Juntas tóricas de silicona o Juntas tóricas de EPDM.

How do you measure an NBR O-ring for replacement?

Measure inner diameter (ID), cross-section (CS), and outer diameter (OD) using calipers.

Refer to our Metric Buna O-Ring selection guide for best practices.

Conclusión

NBR O-rings are critical for leak-free performance in oil and fuel systems. Choose the right specs and pair with proper installation to extend service life.

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