Polypac High Temperature O-Rings — Heat-Resistant Seal Solutions

Polypac high temperature O-rings offer reliable, heat-resistant sealing for extreme environments. Available in FFKM, silicone, FKM and custom compounds. Manufactured in a 10,000 m² facility with advanced testing and academic collaboration.
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Product Information

Polypac High Temperature O-Rings — Reliable Sealing in Extreme Heat

Polypac High temperature O-rings are engineered for demanding applications where heat, pressure, and aggressive media challenge ordinary seals. Backed by over a decade of seal development and a dedicated 10,000 m² manufacturing facility, Polypac delivers heat-resistant O-rings you can trust.

Why choose Polypac high-temp O-rings?

  • Proven materials: We supply high temperature O-rings in FFKM, silicone, FKM and other specialty compounds to meet specific operating ranges and chemical exposures.
  • Custom solutions: From standard sizes to bespoke rubber rings, Polypac provides custom O-rings tailored to special working conditions.
  • Industrial-grade production: Our factory spans more than 10,000 square meters with 8,000 m² of production space and industry-leading testing equipment.

Applications

Polypac heat-resistant O-rings are ideal for aerospace, petrochemical, automotive, power generation, and manufacturing equipment where temperatures and harsh media require superior performance. Common uses include high temperature valves, pumps, compressors, and hydraulic systems.

Quality, Testing, and Technical Support

Polypac maintains strict quality control with modern testing instruments and processes to ensure long-term reliability of every high temperature O-ring. Founded in 2008, we began by producing filled PTFE seals (bronze, carbon, graphite, MoS2, glass) and now offer a broad spectrum of sealing materials. Our long-term collaborations with universities and research institutions—domestic and international—support continuous material development and independent verification, meeting Google E-E-A-T expectations for expertise and authority.

Key benefits at a glance

  • Wide temperature ranges depending on material (silicone, FKM, FFKM)
  • Chemical and thermal resistance for aggressive environments
  • Precision manufacturing and strict inspection for consistent performance
  • Custom compound development and fast prototyping

Polypac’s high temperature O-rings combine expert design, advanced materials, and reliable production to protect your equipment and reduce downtime. Contact us for material recommendations, custom sizes, and technical data sheets to match the best heat-resistant O-ring to your application.

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Q&A

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.
How important is surface finish on the metal parts that contact the seal?
Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.
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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Polypac Industrial Technology Co.,Ltd
No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.
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Your privacy matters to us. We handle your data securely, in compliance with international quality and safety certifications.

With over 10 years of sealing expertise, we are ready to provide you with reliable solutions.

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