Medical-grade O-rings
Medical Grade O-Rings
Medical Grade O-Rings are precision-engineered sealing components manufactured from biocompatible elastomer compounds for use in medical devices, laboratory instruments, diagnostic equipment, and pharmaceutical systems. Compared with standard industrial O-rings, medical-grade seals emphasize biocompatibility, cleanliness, low extractables, sterilization resistance, and consistent material quality to meet the stringent requirements of the healthcare industry.
Why Medical Grade O-Rings Matter
Medical equipment often operates in environments where patient safety, contamination control, and long-term reliability are critical. A seal failure can result in fluid leakage, bacterial contamination, inaccurate measurements, or equipment downtime.
Medical-grade O-rings are designed to provide:
- Excellent sealing performance under repeated compression
- High purity with minimal extractables and leachables
- Compatibility with common sterilization methods
- Stable mechanical properties over long service cycles
- Traceable material batches for quality assurance
These characteristics make them suitable for both reusable and single-use medical devices.
Common Medical Grade Materials
Material selection depends on the sterilization process, operating temperature, and media compatibility.
| Material | Advantages | Typical Applications |
|---|---|---|
| Silicone (VMQ) | Outstanding biocompatibility, flexibility, wide temperature range | Respiratory devices, infusion pumps, diagnostic equipment |
| EPDM | Excellent steam, hot water and chemical resistance | Autoclaves, dialysis systems, fluid transfer equipment |
| FKM (Fluoroelastomer) | Superior chemical and high-temperature resistance | Analytical instruments, medical pumps, laboratory equipment |
| FFKM | Maximum chemical resistance and purity | Biopharmaceutical processing and critical sealing applications |
Many medical compounds are manufactured to comply with USP Class VI, ISO 10993, and FDA food-contact requirements when applicable. Material certification should always match the regulatory requirements of the final product.
How to Choose the Right Medical O-Ring
Selecting a medical seal involves more than matching dimensions.
Consider the Sterilization Method
Different elastomers perform differently under sterilization processes such as:
- Steam autoclave
- Ethylene oxide (EtO)
- Gamma irradiation
- Hydrogen peroxide plasma
For example, silicone and EPDM generally perform well under repeated steam sterilization, while other materials may degrade more quickly.
Verify Chemical Compatibility
The seal material should be compatible with:
- Medical fluids
- Disinfectants
- Cleaning agents
- Pharmaceutical formulations
- Alcohol-based solutions
Choosing the wrong compound may lead to swelling, hardening, or premature seal failure.
Confirm Regulatory Compliance
For medical applications, material certification is often as important as sealing performance. Depending on the device, verify compliance with:
- USP Class VI
- ISO 10993 Biocompatibility
- FDA-compliant materials (where required)
- ISO 13485 manufacturing quality systems
Key Benefits
- High-purity elastomer compounds
- Excellent biocompatibility
- Low particle generation
- Resistance to sterilization cycles
- Long sealing life
- Tight dimensional tolerances
- Available in standard AS568, metric, and custom sizes
Custom Medical Sealing Solutions
For OEM medical devices and pharmaceutical equipment, custom medical-grade O-rings can be supplied with:
- Custom dimensions and cross-sections
- Precision-molded elastomer compounds
- Low-extractable formulations
- Cleanroom manufacturing options
- Material traceability and certification support
Selecting the appropriate medical-grade O-ring not only improves sealing reliability but also helps reduce maintenance, support regulatory compliance, and extend the service life of critical healthcare equipment.
Pharmaceutical compliant sealing compounds: USP VI grade, FDA standard, metal detectable O-ring material
| Compounds | Material | Durometer | Color | Temp Range (F) | Description |
|---|---|---|---|---|---|
| Chemraz SD625 | FFKM | 80 | Black | -4 to +500 | FDA-Grade, Heat/Chemical resistance |
| E70-B105 | EPDM | 70 | Black | -67 to +257 | FDA Compliant, NSF 61 |
| E70-B502 | EPDM | 70 | White | -67 to +257 | Medical Grade, PTFE 1% Internal Lubricant, FDA Compliant |
| F50-B401 | Fluorosilicone | 50 | Blue | -76 to +350 | FDA-Grade |
| F70-B401 | Fluorosilicone | 70 | Blue | -76 to +348 | FDA-Grade, UL 157 Certified |
| F70-B402 | Fluorosilicone | 70 | Blue | -76 to +348 | FDA-Grade |
| N70-B106 | NBR | 70 | Black | -40 to +212 | NSF 61, FDA |
| N70-B502 | NBR | 70 | White | -40 to +212 | General purpose, FDA-Grade |
| N70-C401 | NBR | 70 | Blue | -40 to +212 | Metal/X-ray detectable, FDA-Grade |
| N75-F701 | NBR | 75 | Green | -40 to +212 | Metal/X-ray detectable, FDA-Grade |
| P9082E | FFKM | 70 | White | +14 to +500 | Heat/Chemical resistance, FDA, USP Class VI Certified |
| S50-B601 | Silicone | 50 | Red | -67 to +437 | FDA-Grade |
| S60-C601 | Silicone | 60 | Red | -67 to +392 | FDA-Grade |
| S70-A601 | Silicone | 70 | Red | -67 to +437 | FDA-Grade |
| S70-B001 | Silicone | 70 | Clear | -76 to +437 | USP Class VI Certified, Platinum Cured |
| S70-B401 | Silicone | 70 | Blue | -67 to +392 | USP Class VI Certified, ISO 10993-5 Compliant |
| S75-F601 | Silicone | 75 | Red | -76 to +437 | Metal/X-ray detectable, FDA-Grade |
| T60D-H501 | PTFE | 55-60 Shore D | White | -328 to +482 | FDA-Grade, high heat/chemical resistance |
| V70-B501 | FKM | 70 | White | -4 to +482 | USP Class VI Certified |
| V75-F401 | FKM | 75 | Blue | -15 to +450 | Metal/X-ray detectable, FDA-Grade |
| Z90-I101 | FEP Viton | 90-95 | Black | -76 to +428 | Teflon-Encapsulated, FDA-Grade, oil/fuel resistance |
| Z90-I102 | PFA Viton | 90-95 | Black | -76 to +428 | Teflon-Encapsulated, FDA-Grade, oil/fuel resistance |
| Z90-I601 | FEP Silicone | 85-90 | Red | -76 to +428 | Teflon-Encapsulated, FDA-Grade, high/low temp resistance |
| Z90-I602 | PFA Silicone | 85-90 | Red | -76 to +428 | Teflon-Encapsulated, FDA-Grade, high/low temp resistance |
In the medical and pharmaceutical fields, you can confidently choose KODA for your O-rings and complete sealing solutions. To place an order or learn more about our products, please call +86 18730921709, visit our online store, or fill out our product inquiry form to contact us.