ブナ O リングとニトリル O リング – どちらがあなたのアプリケーションに最適ですか?

buna o rings vs nitrile o rings

目次

I once struggled with seal degradation in oil-heavy systems. The material you choose matters more than you think — especially between Buna O-rings そして ニトリルOリング.

So, what’s the difference, and which one performs better in real applications?

placeholder_image

Let’s compare these two materials in terms of oil resistance, temperature range, pressure stability, and best-fit applications.

Which material is more resistant to oils and fuels?

When it comes to petroleum-based systems, choosing the wrong material can lead to premature failure.

Buna O-rings outperform standard nitrile rubber in harsh oil and chemical environments.

placeholder_image

財産 Buna O-Rings Standard Nitrile O-Rings
耐油性 Excellent for fuels and lubricants Strong, but less durable over time
耐薬品性 Better resistance to bases/acids Moderate, may swell in harsh solvents
Fuel Compatibility Great for gasoline, diesel, biodiesel Works with most, but not biofuels

Want the full overview? Read our Buna O-Rings Guide or deep dive into Nitrile O-Rings Guide.

Which one handles temperature and pressure better?

If your seals are exposed to heat, cold, or high PSI — choose wisely.

状態 Buna O-Rings ニトリルOリング
温度範囲 -40°C to 121°C -40°C to 107°C
耐圧性 Strong under moderate pressure Can harden under extreme load
冷たさの柔軟性 Slightly rigid below -40°C Remains flexible slightly longer

💡 For better temperature range、一緒に行く Buna O-rings. For low-stress systems, nitrile is sufficient and more economical.

Which applications are better suited to each?

Use cases matter — here’s when I personally choose one over the other:

Buna O-Rings Are Best For:

  • Fuel systems in vehicles and boats
  • Hydraulic cylinders in industrial equipment
  • Aerospace fluid systems
  • Marine seals under harsh conditions

Nitrile O-Rings Are Best For:

  • Air compressors and pneumatic fittings
  • General plumbing or water handling
  • Low-pressure HVAC units
  • Cost-sensitive sealing tasks

Explore our Metric Buna O-Ring Guide if sizing is your next step.

How do I choose between Buna and Nitrile?

Still unsure? Use this quick comparison chart:

シナリオ ベストチョイス
Fuel & Oil Exposure Buna O-Rings
Budget-Conscious Industrial Use ニトリルOリング
High Heat Resistance Buna O-Rings
Low-Pressure Systems ニトリルOリング
Chemical Contact Buna O-Rings

Need fast help? WhatsAppでチャットしましょう and get the right material in minutes.

結論

For oil-heavy and chemical-prone environments, I trust Buna O-rings every time. For general industrial tasks, nitrile delivers solid value.

Material selection is the difference between leak-free performance and unexpected failure.

Let us help you choose the right sealing material

📩 メール: [email protected]
📞 WhatsApp: +86 17622979498

Related topic



よくある質問

1. Are Buna and Nitrile O-rings the same?
Technically yes — “Buna” is a trade name for NBR. But some Buna O-rings have enhanced formulations.
2. Which has better oil resistance?
Buna O-rings typically offer superior fuel and lubricant resistance.
3. Can I use Nitrile for fuel lines?
Only for low-exposure systems. For continuous exposure, use Buna or FKM.
4. What temperature can Buna O-rings handle?
Up to 250°F (121°C) — better than standard nitrile.
5. Are they both safe for water sealing?
Yes, but nitrile is more commonly used in water plumbing.
6. Which is more flexible in cold?
Nitrile performs slightly better below -40°C.
7. What about brake fluids?
Avoid both — use EPDM for DOT brake fluids.
8. Can I request a custom mix?
Yes — we offer custom Buna & NBR O-rings.
投稿を共有する:

関連記事

ニュースレターにご登録ください

jaJA
en_USEN bn_BDBN arAR cs_CZCS da_DKDA de_DEDE elEL eoEO es_ESES it_ITIT fr_FRFR pt_BRPT id_IDID ru_RURU ml_INML ro_RORO viVI ukUK tr_TRTR thTH ko_KRKO jaJA
上部へスクロール