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Piston Seal Kit — Polypac High-Performance Hydraulic Seals

Piston Seal Kit — Polypac High-Performance Hydraulic Seals

Overview

Polypac's Piston Seal Kit is a purpose-built sealing solution engineered for hydraulic cylinders and high-pressure piston applications. As a scientific and technical hydraulic seal manufacturer and oil seal supplier, Polypac blends decades of R&D with lean manufacturing to deliver piston seals that minimize leakage, reduce friction, and extend service intervals.

Materials & Performance

Our Piston Seal Kit uses advanced filled PTFE variants (bronze, carbon, graphite, MoS₂, glass) alongside elastomers including NBR, FKM, silicone, EPDM and FFKM. This material range enables tailored performance for wear resistance, low friction, high temperature stability, and chemical compatibility—critical for demanding hydraulic systems.

Customization & Manufacturing Capability

Polypac operates a custom rubber ring and O-ring factory over 10,000 m² with 8,000 m² of production space and industry-leading equipment. We provide bespoke Piston Seal Kit designs for special working conditions—abrasive media, extreme temperatures, high-speed pistons or long-stroke cylinders—supported by close collaboration with universities and research institutes.

Applications & Benefits

Ideal for construction machinery, industrial presses, mobile hydraulics, marine and aerospace systems, the Piston Seal Kit delivers reliable sealing under pressure. Benefits include improved energy efficiency from reduced leakage, longer maintenance intervals, predictable lifetime costs, and compatibility with OEM retrofits.

Quality Assurance & Testing

Every Piston Seal Kit undergoes rigorous dimensional, material and performance testing using advanced equipment. Polypac’s commitment to quality is backed by traceable production batches, strict tolerance control, and material certifications to ensure consistent field performance.

Why Choose Polypac

Choose Polypac for proven expertise in filled PTFE and elastomer seals, extensive production capacity, and tailored solutions for extreme environments. Contact Polypac to specify a Piston Seal Kit that meets your hydraulic performance targets and reduces total lifecycle cost.

Piston Seal Kit Display

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 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 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.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

Table of Contents

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Piston Seal Kit — Polypac High-Performance Hydraulic Seals
Overview
Materials & Performance
Customization & Manufacturing Capability
Applications & Benefits
Quality Assurance & Testing
Why Choose Polypac
Piston Seal Kit Display

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