Polypac Step Seal – Reliable Hydraulic Step Seals

Polypac Step Seal is a high-performance hydraulic seal engineered for demanding environments. Available in PTFE blends and elastomers, it offers low friction, long life, and customizable sizes backed by rigorous testing.
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Product Description

Polypac Step Seal — Overview

Polypac Step Seal is a precision-engineered hydraulic seal designed to deliver dependable performance in harsh working conditions. Made by Polypac, a specialist in seal production and sealing material development, the Step Seal combines advanced materials and strict manufacturing controls to ensure long service life, low leakage, and smooth operation.

Why Choose Step Seal

Durable Materials

Step Seal is available in a range of proven materials, including filled PTFE (bronze, carbon, graphite, MoS₂, glass) and elastomers like NBR, FKM, EPDM, silicone and FFKM. These options let you balance wear resistance, chemical compatibility, and temperature performance to match your application.

Low Friction and Long Life

The PTFE-based options deliver exceptionally low friction and minimal stick-slip, reducing wear on moving parts and improving energy efficiency. Elastomer versions provide good elasticity and sealing under dynamic loads.

Customizable and Precision-Made

Polypac offers custom sizes and compound formulations to fit specific cylinder designs and special working conditions. Our factory—over 10,000 m² with 8,000 m² of production space—uses advanced equipment to ensure tight tolerances and consistent quality.

Applications

Step Seal is ideal for hydraulic cylinders, pumps, construction and mining equipment, agricultural machinery, and other heavy-duty systems where reliable sealing under pressure is essential.

Quality and Testing

Founded in 2008, Polypac maintains rigorous testing procedures and long-term collaboration with universities and research institutes. Each Step Seal undergoes material verification and performance tests to meet demanding industry standards, giving you confidence in field reliability.

Benefits at a Glance

  • Reduced leakage and maintenance
  • Wide material choices for chemical and temperature resistance
  • Custom designs for special conditions
  • Advanced production and thorough testing

Get Started

Contact Polypac to specify Step Seal for your equipment. Our technical team will recommend the best material and size, provide samples, and support testing to ensure the right fit for your application.

Detailed display

  • FSKR-2 拷贝
  • FSKR-3 拷贝
  • FSKR-9 拷贝

Q&A

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.
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.
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.
Get in Touch
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Polypac Industrial Technology Co.,Ltd
No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.
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Tags
hydraulic piston seal
hydraulic piston seal
custom piston seals​
custom piston seals​
High temperature NBR O-ring kit
High temperature NBR O-ring kit
Hydraulic Rod Seal Kit
Hydraulic Rod Seal Kit
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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.

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

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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.

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