China EPDM Rubber Sealing Parts Suppliers for Drinking Water Applications - Factory Quality Assurance
III. Quality Control System
01 Material Testing
- Chemical Stability: ASTM D573 hot air aging test (150°C × 168h, hardness change < ±5A)
- Hygiene and Safety: GB/T 17219 immersion test (lead leaching amount < 0.001mg/L)
02 Process Control
- Compression Molding: Use a 200-500-ton flat vulcanizing machine, and strictly control the vulcanization temperature.
- Dimensional Accuracy: Use a visual inspection machine with 15 cameras for multi-directional inspection, and strictly control the tolerances of key dimensions according to customer requirements.
IV. Technological Development Trends
- 1. Nano Modification: The graphene/EPDM composite material increases the fatigue resistance life by 200%.
- 2. Intelligent Sealing: The EPDM sealing ring integrated with an optical fiber sensor realizes real-time leakage monitoring.
- 3. Environmentally Friendly Process: The technology without in-mold spraying reduces the VOC emissions by 90%.
Conclusion
The peroxide EPDM sealing parts of our company have passed the authoritative certifications of 12 countries/regions, maintain stable performance within the temperature range of -55°C to 150°C and the pressure range of 0-20MPa, and the leakage rate is controlled within the ISO 5208 Class A standard. The products have been successfully applied to more than 500 municipal water supply projects worldwide and over 100,000 high-end residential water purification systems, providing full-life-cycle protection for drinking water safety.
Frequently Asked Questions
What standards are used to test the chemical stability of your rubber sealing parts?
We perform the ASTM D573 hot air aging test at 150°C for 168 hours. Under these conditions, the hardness change of our EPDM seals is strictly controlled within < ±5A to ensure long-term chemical stability.
Are your peroxide EPDM seals safe for drinking water applications?
Yes. Our EPDM seals pass the GB/T 17219 immersion test with a lead leaching amount of < 0.001mg/L, ensuring they meet the highest hygiene and safety requirements for potable water.
How do you ensure the dimensional accuracy of the sealing parts during production?
We utilize high-precision visual inspection machines equipped with 15 cameras for multi-directional inspection, allowing us to strictly control the tolerances of key dimensions according to specific customer requirements.
What are the temperature and pressure limits of your EPDM seals?
Our peroxide EPDM sealing parts maintain stable performance within a wide temperature range of -55°C to 150°C and a pressure range of 0-20MPa.
What certifications do your peroxide EPDM sealing parts hold?
Our products have passed authoritative certifications in 12 countries/regions. The leakage rate is controlled within the ISO 5208 Class A standard, and they are trusted in over 500 municipal water supply projects worldwide.