Choosing between Silicone and NBR O-rings isn’t just a technical decision—it affects system life, cost, and compliance. So, which one should you choose?
Silicone O-rings are ideal for high heat and sterile environments, while NBR O-rings dominate oil-resistant industrial applications.
Let’s compare the differences and use cases to guide your selection.
What’s the difference between Silicone and NBR O-rings?
Silicone resists heat and UV, while NBR excels with oils and fuels. Your environment determines the right fit.
| Caratteristica | Guarnizione in silicone | Anello di tenuta NBR |
|---|---|---|
| Intervallo di temperatura | -50°C a 250°C | -40°C a 120°C |
| Il migliore per | Heat, food, medical | Oil, fuel, hydraulics |
| Resistenza chimica | UV, ozone, dry heat | Oil, fuel, water |
| Costo | Più alto | Più conveniente |
Explore Silicone O-Ring specs | Learn more about NBR performance
Which O-ring material performs better in heat or oil?
- Utilizzo O-ring in silicone for high-temperature, sterile, or outdoor conditions.
- Utilizzo Anelli di tenuta NBR in fuel, hydraulic, or lubricated environments.
| Proprietà | Silicone | NBR |
|---|---|---|
| Resistenza al calore | ✅ Excellent (up to 250°C) | ❌ Moderate (up to 120°C) |
| Resistenza all'olio | ❌ Povero | ✅ Eccellente |
| Resistenza alle intemperie | ✅ Eccellente | ❌ Povero |
How do industries apply Silicone and NBR O-rings?
O-ring in silicone:
- Dispositivi medici
- Food & beverage systems
- Aerospace assemblies
Anelli di tenuta NBR:
- Fuel injection systems
- Cilindri idraulici
- Automotive gaskets
Compare NBR to FKM O-Rings for more oil-based solutions.
What factors should you consider before choosing?
Use this simple checklist:
-
Temperatura:
- Over 120°C → Silicone
- Under 120°C → Proceed to step 2
-
Media Exposure:
- Oil/fuel → NBR
- UV, dry heat, ozone → Silicone
-
Cost Sensitivity:
- Budget-critical → NBR
- Long-term performance → Silicone
Need custom specs? Try our Strumento per la creazione di O-ring.
What do customers say about these materials?
- “NBR O-Rings sealed our diesel pumps perfectly.” – Automotive client
- “Silicone survived 200°C sterilization cycles with no cracks.” – Medical OEM
Mancia: Utilizzo this guide to understand sealing fundamentals.
Conclusione
Silicone and NBR serve different needs—match material to environment and you’ll seal with confidence.
Choose the right O-ring for your system
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