O-rings are widely used as seals for movable and fixed joints of hydraulic, oil-burning and pneumatic devices.
Depending on the requirements for the item, they may have the following properties:
- Oil and gasoline resistance.
- Gas tightness.
- Working pressure from 10 to 50 MPa.
- Operating temperature from -600C to + 2000C.
Specifications
- The inner diameter of the O-ring is from 3 to 250 mm.
- Diameter of section is from 1 to 30 mm.
Resistance to media depending on O-ring design:
1 – Good, 2 – Fair, 3 – Questionable, 4 – Poor.
| Material | ASTM D1418 | Standard Temperature Range (°C) | Petroleum Fluids | Ozone | Resistance Weather (UV) | Vacuum | Compression Set | Resilience |
| Nitrile | NBR | -55 to +135 | 1 | 4 | 4 | 2 | 1 | 2 |
| Fluorocarbon | FKM | -40 to +275 | 1 | 1 | 1 | 1 | 1 | 1 |
| Ethilene propilene | EP | -55 to +150 | 4 | 4 | 4 | 2 | 2 | 2 |
| Silicone | VMQ | -60 to +315 | 3 | 1 | 1 | 4 | 1 | 2 |
| Fluorosilicone | FVMQ | -60 to +200 | 1 | 1 | 1 | 3 | 1 | 2 |
| Chloroprene | CR | -55 to +125 | 2 | 2 | 2 | 2 | 2 | 2 |