NBR 70 Shore O-Ring (Nitrile Rubber)
NBR (Nitrile Butadiene Rubber) is the most widely used elastomer in sealing technology worldwide. With a 70 Shore A hardness rating, these O-rings provide an excellent price-performance balance for both static and dynamic applications.
Key Specifications
- Hardness: 70 Shore A (Standard sealing hardness).
- Temperature Range: -30°C to +100°C (Short term up to +120°C).
- Pressure Resistance: Reliable performance in high-pressure systems with appropriate tolerances and back-up rings.
- Color: Standard Black.
Chemical Resistance
NBR 70 O-rings are renowned for their superior resistance to petroleum-based oils.
| Excellent Resistance To | Not Recommended For |
|---|
| Hydraulic oils (HFA, HFB, HFC) | Brake Fluids (Glycol-based) |
| Mineral oils and greases | High concentration of Ozone |
| Water and air (Low temperature) | Acetone and Ketones |
Why Choose NBR 70?
It is the most reliable solution for general-purpose sealing due to its high abrasion resistance and tensile strength. Ideal for hydraulic cylinders, pneumatic systems, fuel lines, and automotive spare parts.
Installation Warning: To prevent damage to the O-ring during installation, ensure all sharp edges are deburred or chamfered. Lightly lubricate with a compatible hydraulic oil before assembly.
