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Hydraulic Cylinder Rod Seal Replacement — Polypac Precision Seals

Hydraulic Cylinder Rod Seal Replacement — Polypac Precision Seals

Overview: Why Proper Rod Seal Replacement Matters

Hydraulic cylinder rod seal replacement is a critical maintenance step to prevent fluid leakage, contamination ingress and premature cylinder failure. Polypac leverages 15+ years of sealing expertise to provide replacement seals that restore performance, protect system components and extend service life in demanding hydraulic applications.

Polypac Advantages: Advanced Materials & Customization

When you choose Polypac for hydraulic cylinder rod seal replacement, you gain access to a wide selection of materials including filled PTFE variants and elastomers such as NBR, FKM, EPDM, silicone and FFKM. Our factory-scale capabilities allow custom rubber rings, O-rings and tailored seal geometries to meet special pressure, temperature and media conditions.

Performance: Engineered for Reliability

Polypac designs replacement rod seals to minimize friction, resist extrusion and withstand contamination. Our seals are optimized for dynamic contact, fast cycling and high-pressure environments — delivering reliable sealing performance that reduces maintenance intervals and improves system efficiency.

Quality Assurance: Testing and Traceability

Every hydraulic cylinder rod seal replacement from Polypac is produced on advanced equipment and tested for dimensional accuracy, hardness and material integrity. We maintain traceability and collaborate with universities and research institutes to validate long-term durability under real-world conditions.

Installation & Compatibility Guidance

Polypac provides installation instructions and compatibility data to ensure a proper hydraulic cylinder rod seal replacement. Our technical team advises on groove dimensions, backup rings, lubrication and surface finish to prevent scuffing and ensure a leak-free seal.

Ordering & Support

With a 10,000+ m² production footprint and global supply experience, Polypac delivers replacement seals at scale. Contact our engineers for fast quotes, material selection and custom sealing solutions tailored to your hydraulic systems.

hydraulic cylinder rod seal replacement Display

FAQ:

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 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.

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.

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.

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.

Table of Contents

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Hydraulic Cylinder Rod Seal Replacement — Polypac Precision Seals
Overview: Why Proper Rod Seal Replacement Matters
Polypac Advantages: Advanced Materials & Customization
Performance: Engineered for Reliability
Quality Assurance: Testing and Traceability
Installation & Compatibility Guidance
Ordering & Support
hydraulic cylinder rod seal replacement Display

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