Polypac Polyacetal BRT Rings
Polypac Polyacetal (POM) BRT Rings deliver low friction, excellent wear resistance and dimensional stability for hydraulic and industrial sealing. Custom sizes, advanced testing and decades of sealing expertise ensure reliable performance.
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Product Details
Polypac Polyacetal BRT Rings — Reliable, Low‑Friction Sealing
Polypac Polyacetal BRT Rings are precision-molded seal rings made from high-grade polyacetal (POM). Designed for hydraulic, pneumatic and rotating applications, they combine low friction, excellent wear resistance and strong dimensional stability to extend service life and reduce maintenance.
Key Features
- Low friction coefficient for smooth movement and reduced power loss.
- High wear and abrasion resistance for long-term reliability.
- Excellent dimensional stability and low creep under load.
- Good chemical compatibility with hydraulic oils and many lubricants.
- Precise tolerances for consistent sealing performance.
Practical Benefits
- Lower downtime: durable material reduces replacement frequency.
- Improved efficiency: reduced friction helps maintain system performance.
- Cost-effective: long service life lowers total ownership cost.
- Easy integration: compatible with common housings and shaft sizes.
Common Applications
Polyacetal BRT Rings are ideal for:
- Hydraulic cylinders and pumps
- Valves and rotary unions
- Automotive components and transmissions
- Industrial machinery and bearings
Customization and Quality Assurance
Polypac offers tailored solutions to meet specific working conditions. Our custom ring factory spans over 10,000 m², with 8,000 m² of production space and advanced production and testing equipment. Since 2008, we have expanded from filled PTFE seals to a broad material portfolio, including NBR, FKM, silicone, EPDM and FFKM O-rings.
Why Choose Polypac
- Technical expertise: deep knowledge in sealing materials and applications.
- Advanced testing: ensures consistent quality and reliable field performance.
- Collaborative development: long-term partnerships with universities and research institutions.
- Customer focus: custom sizes, quick samples, and OEM support to match your needs.
Polypac Polyacetal BRT Rings bring dependable sealing performance and measurable benefits to your systems. Contact us to discuss custom dimensions, material options and volume production to meet your application requirements.
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Question you may concern
What is the purpose of the metal spring in a rotary shaft seal?
The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.
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.
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 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.
Get in Touch
PRODUCTS
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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