High-Performance EPDM O-Ring for Industrial Static & Dynamic Sealing
Our high-performance EPDM O-rings deliver reliable sealing for steam, hot water, and demanding industrial environments. Available in standard and custom sizes, these rubber O-rings serve as a dependable alternative to NBR, FKM, and silicone seals for both static and dynamic applications.
O-ring sealing is one of the most widely used sealing solutions for static and dynamic applications. An O-ring is an elastomer ring with a circular cross-section. When installed in a groove and compressed, it creates a tight seal that blocks the leakage of liquid or gas. We supply O-rings in multiple rubber materials — including EPDM, NBR, FKM, and silicone — to adapt to diverse media and working environments.
Key Features of Our Rubber O-Rings
- Simple ring structure for easy installation and replacement.
- Suitable for both static sealing and mild dynamic sealing.
- Compact installation space, low cost, and a wide size range.
- Good elasticity and resilience to maintain stable sealing under compression.
- Multiple rubber compounds available to meet different temperature and media requirements.
- Standard sizes in stock; custom sizes and hardness levels accepted.
Curing Process Specifications
| Process Stage |
Sheet |
Button |
| Press Cure |
5 min at 170°C |
10 min at 170°C |
| Post Cure |
1 hr at 125°C |
1 hr at 125°C |
Original Properties & Test Results
| Property |
Specification |
Test Result |
| Hardness, Shore A |
70° ±5 |
70 |
| Tensile Strength, MPa, min |
14 |
14.9 |
| Ultimate Elongation, %, min |
300 |
327 |
| Specific Gravity (g/cm³) |
— |
1.15 |
Heat Resistance & Compression Set
| Test Parameter |
Specification |
Test Result |
| Heat Resistance (70 h at 100°C) — Change in Hardness, points |
10 |
2 |
| Change in Tensile Strength, % |
-25 |
-4.1 |
| Ultimate Elongation, max % |
-25 |
-3.4 |
| Compression Set, max, 22 h at 70°C |
25 |
8 |
Ozone, Water & Low-Temperature Resistance
| Test Parameter |
Specification |
Test Result |
| Resistance to Ozone — Exposure Method B |
No Crack |
Pass |
| Water Resistance: 100°C, 70 h (EA14) — Volume Change, % |
±5 |
3.7 |
| Low-Temperature Brittleness — After 3 min at -55°C (F19) |
Nonbrittle |
Pass |
