High-Pressure Anti-Extrusion O-ring
I. Technical Parameters
|
Parameter |
Specification |
Technical Reference |
|
Size Range |
ID 10mm-100mm (customizable) |
GB/T 3452.1 standard |
|
Material Type |
NBR, FKM, EPDM |
ASTM D2000 |
|
Operating Temperature |
-40℃~+200℃ (FKM) |
ASTM D1418 |
|
Max. Working Pressure |
2.0MPa (dynamic sealing) |
ISO 3601 |
|
Compression Set |
≤15% (200℃×70h) |
GB/T 7759 |
|
Chemical Resistance |
Acids, alkalis, oils, solvents |
ASTM D471 |
|
Surface Roughness |
Ra≤0.8μm (precision ground) |
ISO 4288 |
II. Material Properties & Selection Guide
Nitrile Rubber (NBR)
- Advantages: Superior oil resistance (mineral/hydraulic oils), cost-effective
- Applications: General chemical media, food-grade lubrication
Fluoroelastomer (FKM)
- Advantages: High-temperature endurance (200℃ continuous), strong acid resistance (H₂SO₄/HCl), ozone-resistant
- Applications: Pharmaceutical reactors, corrosive chemical media
EPDM Rubber
- Advantages: Steam resistance, polar solvent compatibility (ketones/alcohols)
- Applications: Food processing, steam sterilization environments
III. Sealing Mechanism & Design
Elastic Deformation Principle
- 15%-30% pre-compression generates radial contact pressure to fill micro-gaps
- Pressure-assisted sealing: System pressure pushes O-ring toward low-pressure groove wall
Anti-Extrusion Design
- Shore hardness 70°-90°
- PTFE anti-extrusion rings mandatory for pressures >10MPa
IV. Key Advantages
Zero-Leakage Reliability
- Contact pressure > media pressure for bidirectional sealing
- Helium leak rate <1×10⁻⁶ Pa·m³/s
Extended Service Life
- FKM lifespan >5,000 hours at 150℃
- PTFE coating reduces friction coefficient by 40% (optional)
Regulatory Compliance
- FDA 21 CFR 177.2600 (food contact)
- USP Class VI (pharmaceutical biocompatibility)
V. Typical Applications
|
Industry |
Application Case |
Recommended Material |
|
Pharmaceutical |
Bioreactor aseptic sealing (CIP/SIP) |
FKM with PTFE coating |
|
Chemical |
Concentrated sulfuric acid mixing |
FKM |
|
Food Processing |
Edible oil homogenizer sealing |
EPDM |
|
Semiconductor |
High-purity chemical transfer |
FFKM (Perfluoroelastomer) |
VI. Usage & Maintenance
Installation
- Use O-ring expanders to prevent deformation
- Apply FDA-grade silicone grease on contact surfaces
Operation Monitoring
- Measure compression set every 500hrs (allowable ≤25%)
- Shut down if friction torque increases >20%
Storage
- Store away from UV light
- Hang vertically; no stacking
VII. Product Schematic (Critical Features)
(Note: Illustrates below details)
- Cross-sectional diameter tolerance ±0.05mm
- ISO 3601-compliant groove dimensions
- PTFE anti-extrusion ring configuration
|
Inner Diameter (mm) |
Wire Diameter (mm) |
|
5.3 |
1.8 |
|
5.6 |
1.8 |
|
6 |
1.8 |
|
6.3 |
1.8 |
|
6.7 |
1.8 |
|
6.9 |
1.8 |
|
7.1 |
1.8 |
|
7.5 |
1.8 |
|
8 |
1.8 |
|
7.1 |
2.65 |
|
7.5 |
2.65 |
|
8 |
2.65 |
|
8.5 |
2.65 |
|
9 |
2.65 |
|
9.5 |
2.65 |
|
10 |
2.65 |
|
10.6 |
2.65 |
|
11.2 |
2.65 |
|
11.8 |
2.65 |
|
12.5 |
2.65 |
|
38 |
1 |
|
100 |
2.65 |
|
106 |
2.65 |
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