Polypac O-Ring Washer Solutions for Hydraulic & Oil Seal Applications

Polypac O-Ring Washer Solutions

Polypac specializes in engineered O-Ring Washer products designed for hydraulic and oil seal applications. As a scientific and technical seal manufacturer, we deliver high-precision rubber rings and O-rings that combine long service life, chemical resistance, and low friction. Our O-Ring Washer category addresses static and dynamic sealing challenges across automotive, industrial hydraulics, and specialty equipment markets.

Material Options and Performance

Choose from a broad range of elastomers and composites: NBR for fuel and oil resistance, FKM for high-temperature and chemical resilience, Silicone for extreme temperature flexibility, EPDM for weather and steam resistance, and FFKM for the most aggressive chemical environments. We also provide advanced PTFE-filled options developed from our roots in filled PTFE technology to reduce wear and friction when needed.

Custom Manufacturing Capacity

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space, supporting high-volume runs and precision bespoke parts. Our manufacturing systems and tooling enable tight tolerances, consistent cross-sections, and repeatable quality for O-Ring Washers in metric and imperial sizes as well as non-standard geometries.

Quality Assurance & Testing

We employ industry-leading testing equipment and protocols to validate hardness, compression set, tensile strength, and leak integrity. Long-term cooperation with universities and research institutes ensures our material formulations and testing methods remain at the cutting edge, guaranteeing reliable sealing performance under special working conditions.

Applications and Benefits

Polypac O-Ring Washers serve hydraulic cylinders, pumps, valves, and rotating shaft seals, providing superior sealing, reduced maintenance, and extended equipment uptime. Benefits include enhanced durability, tailored chemical compatibility, and lower frictional losses—critical for energy efficiency and operational safety.

Why Choose Polypac

Founded in 2008, Polypac combines decades of PTFE and elastomer expertise with award-winning seal design, fast prototyping, and OEM collaboration. Whether you need standard O-Ring Washers or custom sealing solutions for extreme environments, Polypac delivers engineered performance backed by rigorous testing and responsive technical support.

O-Ring Washer Display

FAQ:
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.

What is the difference between a static seal and a dynamic seal?

A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.

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.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

Related Products
BRT-POM - Polypac

BRT O-Ring Gasket | Heavy Duty Sealing Washer for Hydraulic Equipment

Read More
BRT O-Ring Gasket | Heavy Duty Sealing Washer for Hydraulic Equipment
ORing-Kit 012 Hita sp - Polypac

Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections

Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections
ORing-Kit 011Sumt ou - Polypac

Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances

Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances
ORing-Kit 009 Hyud - Polypac

FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments

FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments
Kit008 - Polypac

Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use

Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use
ORing-Kit 007 Cat-A - Polypac

Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery

Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery
ORing-Kit GM006 - Polypac

AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics

AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
Top Selling Products
ORing-Kit 012 Hita sp - Polypac

Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections

Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections
ORing-Kit 011Sumt ou - Polypac

Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances

Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances
ORing-Kit 009 Hyud - Polypac

FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments

FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments
Kit008 - Polypac

Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use

Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use
ORing-Kit 007 Cat-A - Polypac

Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery

Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery
ORing-Kit GM006 - Polypac

AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics

AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
Kit005 - Polypac

O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance

O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance
ORing-Kit Cat4C8253 - Polypac

Nitrile & Viton O-Ring Kits CAT 4C8253 | Chemical & Temperature Resistant Seal Assortments.

Nitrile & Viton O-Ring Kits CAT 4C8253 | Chemical & Temperature Resistant Seal Assortments.
ORing-Kit Cat4C4782 - Polypac

O-Ring Kits CAT 4C4782 | Assorted Seal Kits for Repair, Maintenance & DIY Projects

O-Ring Kits CAT 4C4782 | Assorted Seal Kits for Repair, Maintenance & DIY Projects
801 TUBE - Polypac

Tube-801 | Industrial & DIY Tubing for Plumbing, Pneumatics, Hydraulics & Protection

Tube-801 | Industrial & DIY Tubing for Plumbing, Pneumatics, Hydraulics & Protection
T01 TUBE - Polypac

Tubes-T01 | Flexible & Rigid Pipe for Fluid, Air & Electrical Applications

Tubes-T01 | Flexible & Rigid Pipe for Fluid, Air & Electrical Applications
GSF - Polypac

GSF Piston Seals for Straight Cylinders | Bidirectional Seals for Ram & Plunger Cylinders

GSF Piston Seals for Straight Cylinders | Bidirectional Seals for Ram & Plunger Cylinders
Related Search
Viton (FKM) piston rod seal
Viton (FKM) piston rod seal
Wear Resistant Seals
Wear Resistant Seals
Custom O-rings manufacturer
Custom O-rings manufacturer
custom o ring seals​
custom o ring seals​
Silicone O-Rings
Silicone O-Rings
Food grade NBR O-ring kit
Food grade NBR O-ring kit
Improved Guide Ring
Improved Guide Ring
piston seals for hydraulic cylinders
piston seals for hydraulic cylinders
Spherical Ring
Spherical Ring
POM Backup Ring
POM Backup Ring

Stay Updated with Industry Insights

Subscribe to our articles and receive the latest news, expert guidance, and technical updates directly in your E-mail.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

Rest assured that your privacy is important to us, and all information provided will be handled with the utmost confidentiality.

Contact customer service
×
Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

Request Your Custom Sealing Solution

Fill in your requirements and our team will provide a tailored solution with a quick response.

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.

×

Request Your Custom Sealing Solution

Fill in your requirements and our team will provide a tailored solution with a quick response.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

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.

×
Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

How Can We Help You?

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.

×

How Can We Help You?

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

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

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.

×

📩 Looking for sealing solutions?

Start a chat and get quick answers.

Have questions about our products or services? Let’s chat and find the best solution for you.

Please enter your name not exceed 100 characters
The email format is not correct or exceed 100 characters, Please reenter!
Please enter a valid phone number!
Please enter your field_1188 not exceed 150 characters
Please enter your content not exceed 3000 characters

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.