Struggling with seal fit and leaks in hydraulic or pneumatic systems? Metric Buna O Rings may be the exact solution you need—let me explain why.
Metric Buna O Rings offer precise fit and excellent oil resistance, ideal for modern industrial sealing. Here's how to measure, select, and source the right one.
This guide helps you select the best metric Buna O ring based on your system specs—covering sizes, materials, pressure, and oil compatibility.
What are metric Buna O rings used for?
Metric Buna O Rings are essential for sealing in metric-based systems.
They're used in hydraulic cylinders, pneumatic valves, fuel systems, and industrial machinery.
Metric Buna O Rings are made from NBR (nitrile rubber), offering excellent resistance to oils, fuels, and abrasion. Commonly found in European and Asian equipment, they are ideal where inch-sized O rings don’t fit. They're widely used in:
- Hydraulic cylinders to prevent leakage
- Pneumatic systems to maintain pressure
- Automotive fuel systems for reliable sealing
Você também pode explorar nosso complete Buna O Ring guide for a deeper dive into NBR’s advantages.
How do I measure a metric O ring?
Correct measurements ensure leak-proof performance.
You’ll need to measure the ID, CS, and calculate the OD.
To measure a metric Buna O Ring:
- Diâmetro interno (ID) – Measure across the inside.
- Seção Transversal (CS) – Measure the ring’s thickness.
- Diâmetro externo (OD) – Use the formula: OD = ID + 2 × CS.
- Compare com tabelas de tamanhos – Use an AS568 or ISO chart to match.
Common sizes include:
| DI (mm) | CS (mm) | Aplicativo |
|---|---|---|
| 10.0 | 2.0 | Bombas, válvulas |
| 18.8 | 1.9 | Cilindros pneumáticos |
| 22.4 | 3.1 | Componentes automotivos |
Need a broader range? Try our O Ring Assortment Kit for fast inventory management.
Are metric Buna O rings compatible with hydraulic fluid?
Yes—Buna O Rings are ideal for hydraulic oil sealing.
They resist mineral-based oils and seal reliably under pressure.
Metric Buna O Rings offer excellent performance in hydraulic fluid systems:
- Hydraulic actuators – Prevenir vazamentos
- High-pressure valves – Maintain system stability
- Pump seals – Withstand fluid exposure and wear
For more demanding environments (e.g., with high temp or strong chemicals), consider FKM O Rings for heat sealing ou EPDM O Rings for steam & water resistance.
How do I select the right metric Buna O ring?
Selection depends on pressure, fluid, and environmental exposure.
You’ll need to evaluate material, durometer, and system specs.
Here’s a breakdown to guide your choice:
| Fator | Melhores práticas |
|---|---|
| Material | Ensure NBR fits your chemical exposure |
| Size Accuracy | Use precise calipers for fit |
| Faixa de temperatura | Buna handles -40°C to 120°C comfortably |
| Classificação de pressão | Use 90 Shore hardness for high-pressure applications |
| Alternative Options | Usar FKM or EPDM for heat or steam resistance |
Need help choosing? Ask our team for guidance on O que você acha do WhatsApp? or check our NBR O-Ring product line.
Where can I buy metric Buna O rings in bulk?
Buy directly from trusted industrial suppliers like Hengoseal.
We offer global delivery, custom sizing, and low MOQ.
At Hengoseal, you’ll find:
- Custom-molded metric Buna O Rings
- Bulk order discounts for manufacturers
- Fast global fulfillment
Need sealing for various applications? Our O Ring Assortment Kit is also available for on-the-go repairs.
Conclusão
Metric Buna O Rings ensure precise sealing for hydraulic, pneumatic, and fuel systems—especially where inch-based rings don’t fit.
Browse metric sizes & get expert help today
📩 E-mail: [email protected]
📞 WhatsApp: +86 17622979498
Related topic
- Anéis de Buna O: Tudo o que você precisa saber
- O Ring Assortment Kit: Selection Made Simple
- FKM O Rings for Heat Resistance
- Nitrile Rubber O Rings: Oil-Resistant Choice
- O Ring Seal: The Ultimate Leak Prevention Guide
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