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

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Polypac Heavy Duty Piston Seal

Polypac Heavy Duty Piston Seal delivers reliable, long-lasting sealing for hydraulic cylinders under high pressure and tough conditions. Manufactured with advanced materials (PTFE variants, NBR, FKM, EPDM, FFKM) and strict testing, it ensures low friction, excellent wear resistance, and customizable solutions.

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Product Description

Product Overview

The Polypac Heavy Duty Piston Seal is designed for demanding hydraulic applications. Built to withstand high pressures, wide temperature ranges, and abrasive environments, this seal provides dependable performance and long service life. It’s ideal for industrial cylinders, construction equipment, and mobile hydraulics where reliability matters.

Key Features

High-pressure capability for heavy-duty hydraulic systems.
Low friction design to improve efficiency and reduce wear.
Excellent abrasion and extrusion resistance for long life.
Wide temperature range and media compatibility.
Precision manufacturing for consistent fit and performance.

Materials & Options

Polypac offers a broad range of materials to match application needs, including advanced filled PTFE (bronze, carbon, graphite, MoS₂, glass) for superior wear and low friction, and elastomers such as NBR, FKM, silicone, EPDM, and FFKM for flexible sealing and chemical resistance. Custom blends and coatings are available for special working conditions.

Benefits for Your Equipment

Using Polypac Heavy Duty Piston Seals reduces downtime and maintenance costs. The seals maintain hydraulic efficiency, prevent fluid leakage, and extend component life. Their robust construction helps equipment perform reliably in extreme pressure, temperature swings, and contaminated environments.

Applications

Common uses include construction machinery, agricultural equipment, mining hydraulics, industrial presses, and marine systems. Polypac customizes seals to fit unique cylinder designs and operational demands.

Why Choose Polypac

Founded in 2008, Polypac is a leading manufacturer specializing in seal production, sealing material development, and tailored solutions. Our factory spans over 10,000 m² with 8,000 m² of production space and advanced testing equipment. We collaborate with universities and research institutions to ensure product reliability and innovation.

Quality & Support

Every seal undergoes strict quality checks. We offer technical guidance, custom design services, and rapid production to meet urgent needs. Trust Polypac for proven sealing solutions that protect your hydraulic systems.

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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.

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 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.

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.

If you have any questions about our goods or services, please feel free to contact us.

Let's talk

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.

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