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Polypac High Pressure Piston Rod Seal — Reliable Hydraulic Performance

Polypac's High pressure piston rod seal offers durable, leak-free protection for heavy-duty hydraulic cylinders. Manufactured with advanced materials (PTFE, NBR, FKM) and factory-tested for high-pressure reliability.

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Product Details

Polypac High Pressure Piston Rod Seal — Built for Tough Conditions

Polypac presents a High pressure piston rod seal designed to protect hydraulic cylinders from leakage and contamination in the most demanding applications. Backed by Polypac’s decades of sealing expertise and modern factory capabilities, this piston rod seal combines durable materials and precise manufacturing for consistent, long-term performance.

Why choose Polypac piston rod seals?

Proven reliability: Engineered to withstand high pressure and repeated motion, reducing downtime and maintenance costs.
Quality materials: Available in filled PTFE, bronze-filled PTFE, carbon-filled PTFE, MoS₂ PTFE and elastomers like NBR, FKM, EPDM and FFKM to meet varied working conditions.
Custom solutions: Polypac offers tailored seal designs and rubber rings to suit special environments and unique cylinder geometries.

Manufacturing and testing you can trust

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier. Our custom rubber ring and O-ring factory spans over 10,000 square meters, with 8,000 square meters of dedicated production space. We use advanced production and testing equipment and maintain long-term collaborations with universities and research institutes to continuously improve sealing performance.

Applications and benefits

Designed for heavy machinery, construction equipment, agricultural hydraulics, and industrial presses, the High pressure piston rod seal delivers:

Leak-free operation under high pressure
Resistance to wear and chemical exposure
Stable sealing over wide temperature ranges
Easy integration with standard hydraulic cylinder designs

Polypac’s experience and commitment

Founded in 2008, Polypac began with filled PTFE seals and has expanded into a wide range of O-rings and sealing solutions. Our product development, strict quality control, and collaborative research ensure that every High pressure piston rod seal meets industry standards and customer expectations.

For reliable hydraulic sealing, choose Polypac’s High pressure piston rod seal—engineered for performance, tested for safety, and available with custom options to fit your system.

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FAQ

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.

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

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