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Polypac Metal Tube Seals — Precision Hydraulic Sealing Solutions

Polypac Metal Tube Seals — Reliable Performance for Demanding Applications

Advanced Manufacturing & Materials

Polypac combines decades of sealing expertise with industry-leading production lines and testing equipment. Our Metal Tube seal solutions draw on PTFE composites (bronze, carbon, graphite, MoS2, glass-filled) and advanced elastomers (NBR, FKM, silicone, EPDM, FFKM) to optimize wear resistance, friction, and chemical compatibility for hydraulic and rotary systems.

Custom Design for Special Working Conditions

When off-the-shelf parts fail, Polypac’s engineered Metal Tube seals and custom O-rings meet unusual pressures, temperatures, and media. Our R&D partnerships with universities and research institutes ensure rapid prototyping, material selection, and tailored geometry to extend service life and reduce maintenance intervals.

Factory Capacity & Quality Assurance

Our custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space. Advanced machining, molding, and test rigs support consistent tolerances and ISO-grade inspection. Every Metal Tube seal batch undergoes dimensional, hardness, and leakage testing to guarantee performance under real-world conditions.

Applications & Benefits

Polypac Metal Tube seals are ideal for hydraulic cylinders, pistons, screw pumps, and rotary shafts across construction, oil & gas, marine, and industrial hydraulics. Customers benefit from reduced friction, lower particulate generation, improved sealing under dynamic loads, and compatibility with aggressive fluids.

Why Choose Polypac

Founded in 2008, Polypac has evolved from PTFE-filled seals to a full-spectrum sealing supplier. Our commitment to material science, advanced equipment, and custom engineering ensures dependable Metal Tube sealing solutions that cut downtime and lifecycle cost.

Get Started — Custom Quotes & Technical Support

Contact Polypac today for a consultation on Metal Tube seals, bespoke O-rings, and sealing material development. Our technical team provides CAD-guided design reviews, sample runs, and scalable production for your sealing needs.

Metal Tube Display

FAQ:

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 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 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.

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.

Table of Contents

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Polypac Metal Tube Seals — Reliable Performance for Demanding Applications
Advanced Manufacturing & Materials
Custom Design for Special Working Conditions
Factory Capacity & Quality Assurance
Applications & Benefits
Why Choose Polypac
Get Started — Custom Quotes & Technical Support
Metal Tube Display

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