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

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Polypac Heavy Duty Step Seal

Polypac Heavy Duty Step Seal delivers long-lasting, low-friction sealing for demanding hydraulic applications. Made from advanced filled PTFE and elastomers, it resists extrusion, wear, and extreme temperatures. Custom sizes and fast production.

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Product Description

Overview

Polypac Heavy Duty Step Seal is engineered for demanding hydraulic and oil-sealing applications where reliability and long service life matter. Backed by Polypac’s 15+ years of material expertise and advanced manufacturing capacity, this seal delivers robust performance with easy installation and consistent leakage control.

Key Benefits

Built for heavy use

The step design improves extrusion resistance and load distribution, making it ideal for high-pressure, heavy-duty cylinders. It reduces deformation under stress and maintains a tight seal even in harsh conditions.

Low friction, long life

Using filled PTFE variants (bronze, carbon, graphite, MoS₂, glass) or compatible elastomers, the seal minimizes friction and wear. This results in smoother operation, reduced heat generation, and longer maintenance intervals.

Adaptable to conditions

Available in multiple materials (NBR, FKM, EPDM, silicone, FFKM, and filled PTFE), the Heavy Duty Step Seal can be customized for temperature extremes, chemical exposure, or abrasive environments.

Why Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier specializing in seal production, sealing material development, and customized sealing solutions for special working conditions. Our custom rubber ring and O-ring factory covers over 10,000 m² with 8,000 m² of factory space and advanced production and testing equipment. We collaborate with universities and research institutions to keep materials and processes cutting-edge.

Applications & Value

Perfect for construction machinery, agricultural equipment, heavy hydraulics, and industrial presses, the Heavy Duty Step Seal reduces downtime, lowers repair costs, and improves system reliability. Custom sizes and quick prototyping mean faster time-to-market for OEMs and service providers.

Order & Support

Polypac offers technical consultation, material selection guidance, and fast sample production. Contact us to specify dimensions, working conditions, and required certifications for a tailored sealing solution.

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Frequently Asked Questions

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 can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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.

If you have any other questions, please write email to us or call us , we will reply you ASAP.

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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.

DSR Series Rod Seal | High-Pressure & Shock Resistant Step Seal Design

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DSR Series Rod Seal | High-Pressure & Shock Resistant Step Seal Design