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Low Friction Step Seal — Precision Sealing by Polypac

Low Friction Step Seal — Precision Sealing by Polypac

Overview

Polypac's Low Friction Step Seal is engineered for demanding hydraulic and rotary applications that require minimal drag, long service life, and consistent sealing under variable loads. Combining our decades of experience in filled PTFE technology and elastomer science, this step seal minimizes stick-slip and heat generation while maintaining excellent retention of fluids and pressure.

Key Features & Benefits

Low Friction Step Seal features a stepped profile that reduces contact area and dynamic friction, resulting in lower wear rates and improved energy efficiency. Benefits include extended service intervals, reduced heat build-up, superior response at low speeds, and stable performance across wide pressure ranges — all contributing to lower total cost of ownership.

Materials & Construction

Available in bronze-filled, carbon-filled, graphite, MoS₂-filled, and glass-filled PTFE formulations, the Low Friction Step Seal can be paired with NBR, FKM, silicone, EPDM, or FFKM elastomer energizers. This hybrid construction allows tailored chemical compatibility, temperature resistance, and mechanical resilience for specific working conditions.

Performance & Testing

Manufactured in our 10,000+ m² facility with 8,000 m² production space, each Low Friction Step Seal undergoes rigorous dimensional control and dynamic testing on industry-leading equipment. Polypac's quality systems and test protocols ensure low friction coefficients, tight tolerances, and predictable wear behavior under cyclic loads.

Typical Applications

Ideal for hydraulic cylinders, rotary actuators, pumps, and mobile equipment, the Low Friction Step Seal excels in applications demanding smooth motion and reliable sealing with aggressive fluids, high pressures, or fluctuating temperatures. Common industries include construction, oil & gas, automotive, and industrial hydraulics.

Customization & Supply

Polypac specializes in customized sealing solutions: bespoke dimensions, compound selection, and assembly-ready components are available to meet OEM specifications. With large-scale production capabilities and flexible tooling, we support prototypes to high-volume runs with short lead times.

R&D & Partnership Strength

Since 2008, Polypac has partnered with leading universities and research institutions to advance sealing materials and tribology. Our continuous innovation ensures the Low Friction Step Seal benefits from the latest developments in filled PTFE and elastomeric science.

Why Choose Polypac?

Choose Polypac for proven low-friction step sealing technology, comprehensive material expertise, and manufacturing excellence. Contact our technical team for application review, sample testing, and a tailored sealing solution to maximize the life and efficiency of your equipment.

Low Friction Step Seal Display

FAQ:

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.

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.

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.

Table of Contents

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Low Friction Step Seal — Precision Sealing by Polypac
Overview
Key Features & Benefits
Materials & Construction
Performance & Testing
Typical Applications
Customization & Supply
R&D & Partnership Strength
Why Choose Polypac?
Low Friction Step Seal Display

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