China EPDM Sealing Parts Suppliers - Durable Water Sealing Solutions from Factory for Drinking Water Systems
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
01 Development Trends
- Nano Modification: The graphene/EPDM composite material increases the fatigue resistance life by 200%.
- Intelligent Sealing: The EPDM sealing ring integrated with an optical fiber sensor realizes real-time leakage monitoring.
- Environmentally Friendly Process: The technology without in-mold spraying reduces the VOC emissions by 90%.
02 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
How is the chemical stability of your EPDM sealing parts tested?
Our materials undergo the ASTM D573 hot air aging test at 150°C for 168 hours. The hardness change is strictly controlled within ±5A to ensure long-term chemical and physical stability.
Are your rubber sealing parts safe for drinking water applications?
Yes. Our EPDM sealing parts pass the GB/T 17219 immersion test with a lead leaching amount of less than 0.001mg/L, meeting hygiene and safety standards for drinking water systems.
What technology is used to ensure dimensional accuracy?
We use high-precision visual inspection machines equipped with 15 cameras for multi-directional checks. This allows us to strictly control critical dimensional tolerances according to customer requirements.
What are the latest green manufacturing processes you implement?
We utilize an environmentally friendly process without in-mold spraying, which effectively reduces volatile organic compound (VOC) emissions by up to 90%.
What are the temperature and pressure limits for your peroxide EPDM seals?
Our peroxide EPDM sealing parts maintain stable performance within a temperature range of -55°C to 150°C and a pressure range of 0-20MPa, keeping leakage rates within the ISO 5208 Class A standard.