Ningbo Zhonggao Rubber & Plastic Manufacturing Co., Ltd. is one of the most reliable manufacturers and suppliers of coated o ring in China. The company has world-leading production equipment and strong manufacturing capabilities. Welcome to wholesale custom made coated o ring from our factory.
Material Properties
It has both the elasticity of rubber and the excellent performance of coating.
Low friction coefficient
• Coatings (such as PTFE) significantly reduce the friction resistance of O-rings,
• Suitable for dynamic sealing applications (such as reciprocating or rotating motion)
Enhanced chemical resistance
• The coating can resist corrosive media (acids, alkalis, solvents, etc.), expanding the applicable environment of the O-ring.
Anti-sticking
• The surface of Coated O Ring is smooth and not easy to adhere to particles or media, which can avoid contamination of the sealing surface.
Wide temperature adaptability
• Some O-ring coatings can withstand extreme temperatures (such as PTFE: -200°C to +260°C), compensating for the temperature limitations of rubber itself.
Improved wear resistance
• It reduces the wear of seals and contact surfaces, prolongs service life, and is especially suitable for high-frequency moving parts.
Customized Services

Customized Specifications
Customizable base rubber: needs to be selected according to media compatibility (such as NBR, FKM, EPDM, etc.).
Common coating types that can be customized:
• PTFE (polytetrafluoroethylene): most commonly used, excellent overall performance
• Xylan®/Molykote®: contains lubricating ingredients to further reduce friction.
• PFA (perfluoroalkoxy resin): more chemically resistant.
Customized coating thickness:
The appropriate coating thickness is customized according to the working environment, and the coating thickness is usually 5-30μm.

Value-added Machining
Specialized secondary processing capabilities such as precision perforation, CNC stamping, and edge profiling.
FAQ
Q: How can we get a quote?
A: Contact us with specification: such as size,material, hardness, color, quantity, and if with drawing etc.
Q: What about the lead time for mass production?
A: Honestly, it depends on the order quantity and the season you place the order. Always 15-30days based on general order.
Q: What machines you have in your factory?
A: There are Feeding machine,Strip cutting machine,Rubber vulcanizer, edge flanging machine ,Automatic full inspection machine and etc.
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