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

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dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Hydraulic Cylinder Seal

Polypac Hydraulic Cylinder Seals combine PTFE and premium elastomers for low friction, high wear resistance, and reliable sealing in demanding conditions. Custom designs and advanced testing ensure long service life for OEM and aftermarket.

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Product Description

Polypac Hydraulic Cylinder Seal

Polypac Hydraulic Cylinder Seals deliver dependable sealing for hydraulic systems used in construction, agriculture, industrial machinery, and mobile equipment. Built from advanced PTFE compounds and high-quality elastomers, our seals reduce friction, resist wear, and maintain performance under high pressure and wide temperature ranges.

Why Choose Polypac?

Polypac is a scientific and technical seal manufacturer with over a decade of experience. Our factory covers more than 10,000 m², equipped with modern production and testing facilities. We began with filled PTFE seals and have expanded to offer O-rings and seals in NBR, FKM, silicone, EPDM, FFKM and more. Our close partnerships with universities and research institutes support ongoing material and product improvements.

Key Features

Low friction: PTFE and specialty compounds minimize stick-slip and improve efficiency.
High wear resistance: Filled PTFE options (bronze, carbon, graphite, MoS₂, glass) extend service life.
Reliable under pressure: Designed for stable sealing in high-pressure hydraulic cylinders.
Wide temperature range: Suitable materials for hot and cold environments.
Customizable: Tailored designs and material choices to match special working conditions.
Strict quality control: Advanced testing ensures consistent performance and tight tolerances.

Applications

Ideal for piston and rod seals, guide rings, scrapers, and backup rings in hydraulic cylinders. Whether OEM production or aftermarket replacement, Polypac seals are optimized for durability and smooth operation.

Benefits for Your Business

Using Polypac seals reduces downtime, lowers maintenance costs, and improves equipment life. Our custom solutions help you solve sealing challenges quickly, backed by professional technical support and scalable production capacity.

Contact Polypac today to specify the right Hydraulic Cylinder Seal for your application — custom materials, precise tolerances, and proven performance.

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Q&A

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.

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.

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.

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.

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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.

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