Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
NBR O-Ring with PTFE Surface Coating for Corrosion & Wear Resistance
Ideal for Chemical, Food, Pharmaceutical & Semiconductor Industries
The PTFE-coated NBR O-ring is a meticulously engineered high-performance sealing component that optimally blends the complementary strengths of its dual-material structure. Its NBR (nitrile rubber) base serves as a robust foundation, delivering exceptional oil resistance, mechanical durability, and consistent structural integrity—core traits for reliable industrial sealing. The surface PTFE (polytetrafluoroethylene) coating elevates its capabilities further: it adds a non-stick finish that prevents material adhesion, a wide temperature range (-240℃ to 288℃) to adapt to extreme environments, and strong resistance to corrosive acids, alkalis, and harsh chemicals.
Designed for versatility, it excels in critical sectors like chemical processing, food production, pharmaceuticals, and semiconductors, offering low friction for smooth equipment operation, easy cleaning to reduce maintenance downtime, and contamination resistance to uphold safety standards. More than just a seal, it solves common industrial pain points (wear, corrosion, adhesion) while ensuring long-lasting performance, making it a trusted choice for boosting efficiency in demanding equipment applications.
5.0
design customization
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1. Product Advantages
Forever Seals’ PTFE-coated NBR O-ring stands out for its dual-material synergy—combining NBR’s (nitrile rubber) inherent oil resistance, high tensile strength, and low compression set with PTFE’s (polytetrafluoroethylene) industry-leading non-stick properties, extreme temperature tolerance (-240℃ to 288℃), and superior chemical resistance. Unlike standard O-rings, it resists wear, acids, alkalis, and contamination, ensuring long-lasting sealing efficiency. Its low friction coefficient reduces equipment wear during operation, while the easy-to-clean PTFE surface cuts maintenance downtime—critical for high-demand industrial workflows.
2. Working Principle
This O-ring operates on a “base + coating” collaborative design: the NBR core forms a tight, flexible seal against mating surfaces, leveraging its elasticity to prevent fluid/gas leakage and withstand mechanical stress (e.g., pressure, vibration) in industrial equipment. The thin, uniform PTFE coating acts as a protective barrier—shielding the NBR base from corrosive media (acids, solvents) and high/low temperatures, while its non-stick nature prevents material adhesion (e.g., food residues, chemical byproducts) that could compromise sealing performance. Together, these layers ensure reliable, consistent sealing even in harsh environments.
3. Product Details
Material Composition: High-grade NBR rubber core (acrylonitrile-butadiene copolymer) + precision-sprayed PTFE coating (thickness: 5-15μm, depending on size).
Temperature Range: -240℃ (-400℉) to 288℃ (550℉) for continuous use; brief exposure to 300℃ (572℉) is acceptable.
Key Specifications: Available in standard sizes (AS568, ISO 3601) and custom dimensions; Shore A hardness: 70-90 (NBR base); resistance to oils, fuels, hydraulic fluids, and most organic solvents.
Quality Assurance: Each unit undergoes leak testing, coating adhesion checks, and temperature-resistance validation to meet Forever Seals’ strict industrial standards.
4. Application Range
Ideal for sectors requiring durable, contamination-free sealing:
Chemical Industry: Pipes, valves, and reactors handling acids, alkalis, and corrosive solvents.
Food & Beverage: Processing equipment (mixers, pumps) where non-stick, easy-clean surfaces prevent product contamination.
Pharmaceuticals: Sterile equipment (autoclaves, drug synthesis tanks) meeting GMP (Good Manufacturing Practice) standards.
Semiconductors: Precision tools (wafer handlers, vacuum chambers) where low friction and chemical resistance protect sensitive components.
5. FAQ
Q1: How long does the PTFE coating last?
A1: Under normal operating conditions (within temperature/chemical limits), the coating maintains integrity for 2-5 years—longer than uncoated NBR O-rings. Forever Seals recommends replacement if coating peeling or wear is visible.
Q2: Can this O-ring be used with food-grade materials?
A2: Yes. Both the NBR core and PTFE coating meet FDA (U.S. Food and Drug Administration) and EU 10/2011 standards, making it safe for food contact applications.
Q3: What’s the difference between “sprayed PTFE” and “dipped PTFE” coatings?
A3: Our sprayed PTFE creates a thinner, more uniform layer (reducing friction without adding excess bulk) compared to dipped coatings—ideal for tight sealing spaces in precision equipment.
6. Company Selling Points (Forever Seals)
Expertise: 15+ years of specializing in high-performance sealing solutions for industrial, food, and pharmaceutical sectors.
Customization: Offer tailored sizes, hardness levels, and coating thicknesses to match unique customer equipment needs.
Quality Control: ISO 9001-certified production process; every O-ring is tested for leak resistance, coating adhesion, and temperature tolerance before shipment.
Customer Support: 24/7 technical assistance and fast delivery (3-5 business days for standard orders; 7-10 days for custom orders) to minimize downtime for clients.
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