dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

English

Turkish

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Rubber O-Rings — Reliable, Custom Sealing Solutions

Polypac rubber O-rings deliver durable, customizable sealing for hydraulic and industrial uses. Available in NBR, FKM, silicone, EPDM and FFKM with strict testing, fast production and expert support.

Get a free quote

Product Details

Polypac Rubber O-Rings — Reliable Sealing Solutions

Polypac offers high-quality rubber O-rings designed for hydraulic systems, oil seals and demanding industrial environments. Our O-rings focus on long-lasting performance, tight sealing, and easy installation so your equipment runs reliably with minimal maintenance.

Materials & Performance

We provide O-rings in a wide range of materials to meet different working conditions:

NBR (Nitrile): excellent oil and fuel resistance for general hydraulic use.
FKM (Viton): superior high-temperature and chemical resistance.
Silicone: flexible at low temperatures and suitable for food-grade or medical-related applications.
EPDM: great for weather, steam and hot water resistance.
FFKM (Perfluoroelastomer): the highest chemical and thermal resistance for extreme conditions.
Choose the material that matches your temperature range, fluid compatibility, and lifespan needs.

Custom Sizes & Quality Control

Polypac specializes in custom rubber rings and O-rings. Our factory spans over 10,000 m² with 8,000 m² of production space and advanced manufacturing and testing equipment. We support custom dimensions, special compounds and small-batch prototyping, ensuring fast turnaround for urgent projects. Every batch undergoes stringent inspection and performance testing to guarantee seal integrity under real operating conditions.

Why Choose Polypac

Founded in 2008, Polypac began with filled PTFE seals and has grown into one of China’s leading seal manufacturers. We maintain long-term collaboration with universities and research institutes to continuously improve materials and processes. Our combined experience in sealing material development, oil seals and hydraulic solutions means we deliver products that balance cost, durability and performance.

Polypac Rubber O-Rings are practical, reliable and made for real-world use. Contact us for material recommendations, custom quotes, or to request samples—your sealing challenge is our specialty.

Product Images

Q&A

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.

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 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.

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.

Let's talk

PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

O-Rings | Standard & Metric Seals for Hydraulic, Pneumatic & Plumbing

Polypac O-Rings offer durable, high-quality standard and metric seals ideal for hydraulic, pneumatic, and plumbing applications. Our range includes High Quality rubber O-Rings, silicone O-Rings, and comprehensive O-Ring kits for reliable, leak-proof performance in any system.

O-Rings | Standard & Metric Seals for Hydraulic, Pneumatic & Plumbing

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-rings are the most versatile and economical sealing solution for static and dynamic applications. Our nitrile rubber O-rings offer excellent resistance to petroleum-based oils, fuels, and hydraulic fluids, making them ideal for a wide range of industrial, automotive, and plumbing uses.

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes

This comprehensive O-ring kit contains the most commonly used sizes and durometers for general maintenance and repair.

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes

O-Rings | Standard & Metric Seals for Hydraulic, Pneumatic & Plumbing

Polypac O-Rings offer durable, high-quality standard and metric seals ideal for hydraulic, pneumatic, and plumbing applications. Our range includes High Quality rubber O-Rings, silicone O-Rings, and comprehensive O-Ring kits for reliable, leak-proof performance in any system.

O-Rings | Standard & Metric Seals for Hydraulic, Pneumatic & Plumbing