PTFE coated ring with FEP inner layer and silicone-encapsulated VITON fluororubber sealing ring.

PTFE coated rings with FEP inner silicone rubber, VITON fluoroelastomer seals, HNBR hydrogenated rubber seals FDA food grade seals, PFA coated O-rings Suzhou FEP coated seals manufacturer, PU polyurethane seals O-RING, FVMQ fluorosilicone food grade medical grade seals

Company Introduction:
Suzhou Yongxin Technology is a supplier of sealing components in motion and control systems, providing sealing solutions for transmission control, automation equipment, and aviation, selling various seals, hydraulic, pneumatic, and fluid control products and components. In terms of seals, Yongxin offers hydraulic and pneumatic sealing products, including dynamic seals, static seals, sealing rings, oil seals, gaskets, packing, etc.

Material Introduction:
Teflon FEP and Teflon PFA are essentially similar materials, but Teflon PFA has better high-temperature resistance than Teflon FEP.
Applicable Temperature Range:
Teflon FEP shell: -60℃~205℃, can be used at high temperatures up to 260℃ for short periods.
Teflon PFA shell: -60℃~260℃, can be used at high temperatures up to 300℃ for short periods.
Solid Chem-Ring seals are widely used in both static and dynamic sealing applications. Hollow silicone rubber Chem-Ring seals generally have a larger wire diameter and are used in static sealing, with lower hardness and compression resistance compared to solid Chem-Ring seals.

Hardness Introduction:
The average hardness of Chem-Ring seals made from different materials is:
Solid silicone rubber: 85-90
Solid Viton rubber: 90-95
Hollow silicone rubber: 75-80

Installation Instructions for Coated Rings:
1. The area where the Chem-Ring seal is installed or passed through must be smooth, free of burrs, grooves, and sharp edges. The surface finish of the inner hole should be 20 microinches, and the shaft finish should be 10 microinches.
2. Lubricate the surface of the Chem-Ring seal and the relevant contact areas with clean light oil or grease.
3. If installing the Chem-Ring seal on a shaft is difficult, immerse it in hot water for a few minutes to allow it to expand. This softened and expanded O-ring is easier to install. Install the O-ring while it is warm; it will return to its original size upon cooling.
4. Do not bend the Chem-Ring O-ring too sharply, as this may cause Teflon to wrinkle and affect performance.

Required Compression for Coated Rings:
Static sealing: 15%-20%
Dynamic sealing: 10%-12%
Pneumatic sealing: 7%-8%
Thickness of the outer coating layer (as shown in the table below)
Wire diameter (inchs/mm)
Thickness of outer FEP layer (inchs/mm)
Wire diameter (inchs/mm)
Thickness of outer FEP layer (inchs/mm)


After-Sales Service:
Yongxin Seals provides material certifications for all products, ensuring customers can buy and use with confidence and without worries! Customized packaging and shipping methods are available based on customer requirements to meet different clients' cleanliness standards for products. We also welcome inquiries and cooperation from trading partners!

Technical Support:
Yongxin Seals offers technical support in the sealing field. Our engineering team has over 10 years of experience and is ready to help customers solve product sealing design issues, material selection challenges, and sealing aging tests. We welcome inquiries from industry peers and those in need of sealing components.