PTFE Encapsulated O-Rings — Polypac High-Performance Seals
High-Performance PTFE Encapsulated O-Rings
Polypac's PTFE Encapsulated O-Rings deliver exceptional sealing performance by combining a chemically inert PTFE jacket with a resilient elastomer core. Engineered for demanding hydraulic and oil sealing applications, these encapsulated O-rings resist aggressive media, extreme temperatures, and wear while preserving elasticity and sealability.
Superior Chemical and Thermal Resistance
PTFE Encapsulated O-Rings provide outstanding resistance to solvents, acids, alkalis, and fuels. The PTFE outer layer dramatically extends service life in corrosive or high-temperature environments, while the elastomeric inner core (available in NBR, FKM, silicone, EPDM, FFKM) maintains compression set resistance and sealing reliability.
Precision Manufacturing and Material Expertise
As a scientific and technical hydraulic seal manufacturer, Polypac combines advanced production equipment with decades of material science experience. Our custom rubber ring and O-ring factory spans more than 10,000 m² with 8,000 m² of production space, ensuring consistent quality and tight dimensional control for PTFE Encapsulated O-Rings across standard and bespoke sizes.
Customized Solutions for Special Conditions
Polypac specializes in sealing material development and tailored solutions. Whether you require bronze-, carbon-, graphite-, MoS₂-, or glass-filled PTFE housings or specific elastomer cores, our R&D collaborations with universities and research institutions enable rapid customization to meet extreme pressure, friction, or chemical exposure demands.
Applications and Industry Benefits
Ideal for hydraulic cylinders, valves, pumps, and oil systems, PTFE Encapsulated O-Rings reduce downtime and maintenance costs by improving abrasion resistance and chemical compatibility. Their low friction surface enhances dynamic performance and contributes to smoother operation and longer life in mobile and industrial equipment.
Quality Assurance and Ordering
Polypac employs rigorous testing and inspection to guarantee performance. We offer small- and large-batch production, rapid prototyping, and full technical support to specify the right PTFE Encapsulated O-Rings for your application. Contact Polypac for samples, drawings, and engineering assistance to optimize sealing performance and reliability.
PTFE Encapsulated O-Rings Display
Why did my O-ring fail prematurely?
Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.
What is the difference between NBR and FKM materials?
NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.
When should I use a spring-energized seal instead of a standard elastomeric seal?
Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.
How can I prevent seal damage during installation?
Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.
How do I choose the right material for my sealing application?
Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.
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