Polypac O-Ring Seals — Reliable Rubber O-Rings for Industrial Use

Polypac manufactures high-quality O-ring seals in a modern 10,000 m² facility. Offering NBR, FKM, silicone, EPDM and FFKM materials, we provide reliable, tested and customizable sealing solutions for demanding hydraulic and oil applications.
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Product Information

Polypac O-Ring Seals: Dependable Sealing Solutions

Polypac is a scientific and technical manufacturer of hydraulic seals and oil seals, specializing in seal production, sealing material development, and customized solutions for special working conditions. Our O-ring seals are designed for reliability, long service life, and easy installation across a wide range of industries.

Advanced Factory and Testing

Our custom rubber ring and O-ring factory covers more than 10,000 square meters, with 8,000 square meters of production space. We use advanced production and testing equipment to ensure consistent quality. Polypac works closely with universities and research institutes, keeping our materials and processes at the leading edge of seal technology.

Materials and Options

We offer O-rings in a variety of materials to meet different temperature, chemical and pressure requirements:

  • NBR (Nitrile) — oil and fuel resistance for general hydraulic uses
  • FKM (Viton) — high temperature and chemical resistance
  • Silicone — excellent flexibility and low-temperature performance
  • EPDM — weather, steam and hot water resistant
  • FFKM — top-tier chemical resistance and extreme performance

Experience and Development

Founded in 2008, Polypac began with filled PTFE seals (bronze, carbon, graphite, MoS₂, glass filled PTFE). Over the years we expanded into rubber O-rings to provide complete sealing solutions. Our experience in materials and manufacturing ensures each O-ring performs reliably under real-world conditions.

Why Choose Polypac?

  • Proven quality: strict testing and quality control at every step.
  • Wide material range: choose the right compound for your application.
  • Custom solutions: tailored sizes, hardness and compounds for special environments.
  • Technical support: guidance from experienced sealing engineers.

Whether you need standard O-rings or custom-made seals for demanding hydraulic, automotive, or industrial systems, Polypac delivers dependable performance and peace of mind. Contact us to find the right O-ring for your application.

Picture Show

  • O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes (3)
  • O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes (6)
  • O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes (1)

FAQ

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.
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.
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 does "AS568" mean?
AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.
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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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Tags
PU O-Rings
PU O-Rings
Low Friction Wear Ring
Low Friction Wear Ring
OEM Replacement Part
OEM Replacement Part
O-Ring Washer
O-Ring Washer
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Whether you need product details, technical support, or a custom solution, we’re here to assist.

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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How Can We Help You?

Whether you need product details, technical support, or a custom solution, we’re here to assist.

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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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