Choosing the wrong O-ring material can cause leaks, system failures, and costly downtime. How do you decide between FKM and NBR O-rings for your specific needs?
FKM O-rings outperform NBR in heat, chemical, and fuel resistance, while NBR excels in cold flexibility and cost-efficiency.
Let me guide you through the key differences and help you make the best choice.
What is the difference between NBR and FKM O-rings?
Both NBR (Nitrile) and FKM (Fluorocarbon) are popular elastomers but serve different environments.
| Vlastnictví | O-kroužek FKM | O-kroužek z NBR |
|---|---|---|
| Odolnost proti oleji | ⭐⭐⭐⭐⭐ Excellent | ⭐⭐⭐ Good |
| Odolnost vůči palivu | ⭐⭐⭐⭐ High | ⭐⭐ Moderate |
| Chemická odolnost | ⭐⭐⭐⭐⭐ Superior | ⭐⭐ Limited |
Závěr: Vybrat O-kroužky FKM for aggressive environments. Use O-kroužky z NBR for simple oil sealing at lower costs.
Which O-ring is better for high temperature applications?
Temperature range is critical when selecting the right seal material.
| Funkce | O-kroužek FKM | O-kroužek z NBR |
|---|---|---|
| Teplotní rozsah | -20 °C až 200 °C | -40 °C až 120 °C |
| Tepelná odolnost | ⭐⭐⭐⭐ Excellent | ⭐⭐ Poor |
| Pružnost za studena | ⭐⭐ Moderate | ⭐⭐⭐⭐⭐ Excellent |
Tip: Above 120°C, always choose O-kroužky FKM. For cold applications, NBR is more flexible.
When should you use FKM O-rings instead of NBR?
Choosing the right material depends on your real-world application.
Use FKM O-rings for:
- Motory a palivové systémy
- Chemické zpracování
- High-temperature hydraulics
Use NBR O-rings for:
- Pneumatic and hydraulic machinery
- Refrigeration systems
- Nákladově citlivá OEM výroba
Need general-purpose sealing? Discover NBR O-rings for industrial use.
What common mistakes to avoid when choosing between FKM and NBR?
Avoid these costly errors:
- Chyba 1: Using NBR above 120°C → FKM is needed for high heat.
- Chyba 2: Choosing FKM for low-stress jobs → NBR saves money without sacrificing quality.
- Chyba 3: Ignoring chemical compatibility → Always verify resistance charts.
Prozkoumejte naše complete FKM selection guide pro hlubší vhledy.
Summary: Which O-ring material suits your application best?
| Kritéria | O-kroužek FKM | O-kroužek z NBR |
|---|---|---|
| Tepelná odolnost | ✅ Výborně | ❌ Chudák |
| Odolnost proti oleji | ✅ Vysoká | ✅ Mírné |
| Chemická odolnost | ✅ Silný | ❌ Slabá |
| Pružnost za studena | ❌ Střední | ✅ Výborně |
| Náklady | ❌ Vyšší | ✅ Nižší |
| Nejlepší pro | Kritické systémy | Obecný průmysl |
Závěr
Choosing between FKM and NBR is about matching your application’s environment and budget for long-term success.
Get expert advice for your O-ring selection
📩 E-mail: [email protected]
📞 WhatsApp: +86 17622979498
Související příspěvek
- NBR O-Rings: Selection and Applications
- FKM Seals & O-Rings for High-Temperature Use
- Jak fungují O-kroužky: Kompletní průvodce
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