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
Entdecken Sie auch unsere 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:
- Innendurchmesser (ID) – Measure across the inside.
- Querschnitt (CS) – Measure the ring’s thickness.
- Außendurchmesser (OD) – Use the formula: OD = ID + 2 × CS.
- Vergleichen Sie mit Größentabellen – Use an AS568 or ISO chart to match.
Common sizes include:
| Innendurchmesser (mm) | CS (mm) | Anwendung |
|---|---|---|
| 10.0 | 2.0 | Pumpen, Ventile |
| 18.8 | 1.9 | Pneumatische Zylinder |
| 22.4 | 3.1 | Automobilkomponenten |
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 – Leckagen verhindern
- 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 oder 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:
| Faktor | Bewährte Vorgehensweise |
|---|---|
| Material | Ensure NBR fits your chemical exposure |
| Size Accuracy | Use precise calipers for fit |
| Temperaturbereich | Buna handles -40°C to 120°C comfortably |
| Druckbewertung | Use 90 Shore hardness for high-pressure applications |
| Alternative Options | Verwenden FKM or EPDM for heat or steam resistance |
Need help choosing? Ask our team for guidance on 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.
Abschluss
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
- Buna O-Ringe: Alles, was Sie wissen müssen
- 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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