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Hydraulic O-rings for high pressure — Polypac

Why Polypac for high-pressure hydraulic sealing

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier with deep expertise in Hydraulic O-rings for high pressure. Since 2008 we have combined material science, precision production, and field-tested designs to deliver O-rings that resist extrusion, compression set, and chemical attack. Choose Polypac for reliable sealing performance, long service life, and tailored solutions for demanding environments.

Materials engineered for extreme conditions

We offer a wide portfolio including NBR, FKM, FFKM, EPDM, and silicone O-rings, plus specialty PTFE-filled compounds (bronze, carbon, graphite, MoS₂, glass). Each compound is selected and formulated to meet pressure, temperature, and fluid compatibility requirements. Our material development ensures that Hydraulic O-rings for high pressure maintain elasticity, sealing integrity, and low friction in both static and dynamic applications.

Advanced manufacturing and strict quality control

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² production space and industry-leading production and testing equipment. Every batch undergoes dimensional inspection, hardness testing, and pressure/endurance trials. Our close partnerships with universities and research institutions enable continuous improvement and rapid iteration for bespoke sealing challenges.

Applications and proven performance

Our Hydraulic O-rings for high pressure are engineered for hydraulic cylinders, pumps, valves, subsea equipment, and high-pressure instrumentation across automotive, aerospace, oil & gas, and industrial sectors. Designed to minimize leakage and downtime, Polypac seals perform reliably under cyclic loading, extreme temperatures, and aggressive hydraulic fluids.

Custom solutions and support

From standard sizes to custom geometries, Polypac provides end-to-end service: material selection, prototyping, testing, and volume production. Contact our technical team for application-specific recommendations, fluid compatibility charts, and rapid quoting. Trust Polypac to deliver high-pressure hydraulic sealing solutions that protect equipment and optimize system efficiency.

Hydraulic O-rings for high pressure Display

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.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

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.

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.

Table of Contents

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Hydraulic O-rings for high pressure — Polypac
Why Polypac for high-pressure hydraulic sealing
Materials engineered for extreme conditions
Advanced manufacturing and strict quality control
Applications and proven performance
Custom solutions and support
Hydraulic O-rings for high pressure Display

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