O-rings may swell during operation, causing an increase in volume, which can lead to poor sealing or leakage.
| Category | Summary |
|---|---|
| Cause Analysis | 1. Contact with media: Certain fluids (e.g., oils, solvents) can react with O-ring materials, causing swelling. 2. Temperature changes: Under high temperatures, rubber materials expand, affecting sealing performance. |
| Solutions | 1. Choose materials resistant to swelling: such as those with high oil resistance; contact with methanol/ethanol. 2. Control media contact: select materials compatible with the media to reduce direct contact. PTFE coated O-ring could be a choose for chemical protection. 3. Control temperature changes: maintain stable temperatures and use high-temperature resistant materials. |
You could follow the table in below providing the temperature ranges and chemical resistance types for common rubber materials. Choose the right rubber material at the design phrase.
| Rubber Type | Temperature Range | Resistance to Chemical Agents |
|---|---|---|
| Fluorosilicone (FVMQ) | -60°C to 200°C | Resistant to oil, solvents, fuels, high-temperature oxidation, ozone, UV light; suitable for extreme temperature variations. |
| Fluorocarbon (FKM) | -20°C to 200°C | Resistant to oil, fuels, acids, bases, most chemicals, ozone; excellent heat resistance. |
| Low-Temperature Fluorocarbon (Low Temp FKM) | -40°C to 200°C | Maintains excellent oil and chemical resistance of FKM with improved low-temperature flexibility and sealing, ideal for cold environments. |
| Silicone (VMQ) | -60°C to 230°C | Resistant to heat, cold, ozone, and aging; poor chemical resistance, not resistant to oil and solvents. |
| Hydrogenated Nitrile (HNBR) | -40°C to 150°C | Resistant to oil, fuels, heat, ozone, abrasion, and high pressure; suitable for automotive and industrial applications. |
| Ethylene Propylene Diene Monomer (EPDM) | -50°C to 150°C | Resistant to water, steam, acids, bases, ozone; not resistant to oil and fuels. |
| Nitrile (NBR) | -40°C to 120°C | Resistant to oil, fuels, solvents, abrasion; poor ozone and weather aging resistance. |
Please contact us to provide our rubber seal solution for your reference.
