Custom EPDM O-Ring for Construction & Water Treatment Sealing
This custom EPDM O-ring delivers heat and dilute chemical resistance with low compression set, making it a dependable sealing solution for construction, water treatment, HVAC, automotive, and sanitary equipment applications. Manufactured under ISO9001:2000 quality management, it combines consistent performance with reasonable pricing and full support for customer-specific designs.
Specifications
EPDM O-ring sealing products from an ISO9001:2000 certified manufacturer — good quality, reasonable price, and customer designs welcome.
An O-ring is a ring-shaped sealing product typically formed from elastic material through a molding process. It is generally used to seal fluid liquids or gases and often functions as part of a complete sealing assembly. O-rings perform well in both static and dynamic sealing applications. Main materials include NR, CR, NBR, SBR, FKM, silicone, HNBR, and PU.
Key Features
- Superior resistance to ozone, UV radiation, and weather aging for a long service life under outdoor exposure.
- Excellent resistance to hot water and steam — ideal for wet and high-humidity working environments.
- Good tolerance to dilute acids, alkalis, and polar chemical media.
- Low compression set and stable elasticity for reliable, leak-proof sealing.
- Standard AS568 sizes in stock, with custom dimensions and hardness available.
- Alternative rubber materials available — NBR, silicone, and FKM — for diverse working requirements.
Applications
- Water treatment industry: Seals for water pumps, pipe flanges, water valves, and filter housings.
- HVAC systems: Sealing components for heating, ventilation, and air conditioning equipment.
- Automotive industry: Radiator, cooling circuit, and brake fluid system seals.
- Plumbing & sanitary equipment: Seals for potable water pipelines and faucets.
- Outdoor & construction machinery: Seals exposed to sunlight and atmospheric aging.
- Food & sanitary machinery: Food-grade EPDM O-rings for clean fluid processing equipment.
Rubber O-Ring Material Advantages
- High and low temperature resistance.
- Abrasion resistance and UV resistance.
- Ozone resistance (silicone rubber O-ring option available).
- Material options: silicone, NBR, SBR, NR, EPDM, IIR, EP, CR, and more.
- Waterproof and oil resistant.
- Highly durable with reliable sealing performance.
- Innocuous and safe — widely used in automotive and motorcycle products.
- Manufactured according to customer requirements.
Curing Schedule
Press Cure and Post Cure Parameters| 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
Physical Property Test Data| 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 (70 h at 100°C)
| Parameter | Specification | Test Result |
|---|
| 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)
| Parameter | Specification | Test Result |
|---|
| Compression Set, max | 25 | 8 |
Resistance to Ozone
| Test Method | Requirement | Result |
|---|
| Exposure Method B | No crack | Pass |
Water Resistance (100°C, 70 h, EA14)
| Parameter | Specification | Test Result |
|---|
| Volume Change, % | ±5 | 3.7 |
Low-Temperature Brittleness
| Test Condition | Requirement | Result |
|---|
| After 3 min at -55°C (F19) | Non-brittle | Pass |
