Q: What is a Double Coated PTFE O Ring?
A: A precision-engineered sealing solution featuring a PTFE (Teflon®) outer layer bonded to an elastic inner core (typically silicone or FKM). This dual-layer design merges PTFE’s extreme chemical/thermal resistance with core flexibility, eliminating compression set issues in static/dynamic seals.
Q: Why choose double coating?
A: The dual-coating technology solves 3 critical challenges:
✅ Zero Leakage – PTFE’s near-zero friction surface prevents glandular micro-gaps.
✅ Longevity – Resists degradation from acids, solvents, and 260°C+/500°F temps.
✅ Adaptability – Inner core maintains seal force under vibration/thermal cycling.
Q: Where does it outperform standard O-rings?
A: Ideal for ultra-demanding environments:
➠ Semiconductor etch tools (HF acid resistance)
➠ Pharma CIP/SIP processes (steam sterilization)
➠ High-speed rotary unions (low friction = energy savings)
➠ Aerospace fuel systems (wide thermal range:-50~250℃
Operating Limited:
| Material |
PTFE |
| Yield strength |
23MPa |
| Temperature |
-50~250℃ |
| Density |
2.2-2.3g/m3 |
Application:
Used in erospace, automotive, chemical, petrochemical, chemical, food industry, biotechnology, clean water, machinery industry, sewage treatment etc.
Used in pumps and valves, reactor vessels, mechanical seals, filters, pressure vessels, heat exchangers, boilers, pipeline flange, gas compressors etc.
Shipping & Payment Terms:
Port of Loading: Shanghai
Shipping Method: DHL,UPS,FEDEX,TNT, etc
Payment Terms: T/T, Western Union, money gram
Our services:
◆ OEM/ODM orders are available for our factory
◆ Accept customized mechanical seals according to your drawing or requirements
◆ Small quantity is accepted
◆ Provides excellent quality with competitive price
