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Piston Rod Seal Solutions by Polypac

Polypac Piston Rod Seal Solutions

Precision Sealing for Piston Rods

Polypac's Piston Rod Seal range is engineered to provide reliable rod sealing in hydraulic cylinders across mobile, industrial, and heavy-duty sectors. Designed to resist extrusion, wear, and fluid degradation, our seals maintain system efficiency, reduce leakage, and extend cylinder life under high pressure and variable temperatures.

Materials & Technology

Starting from filled PTFE formulations (bronze, carbon, graphite, MoS2, glass-filled PTFE) to elastomers such as NBR, FKM, EPDM, silicone, and High Quality FFKM, Polypac selects materials for optimal compatibility with hydraulic fluids and working environments. Our material science team customizes sealing compounds to balance friction, wear resistance, and sealing performance for piston rod dynamics.

Manufacturing Excellence & Capacity

With a dedicated factory over 10,000 m2 and an 8,000 m2 production area, Polypac invests in advanced molding and testing equipment to ensure consistent quality. Founded in 2008, we combine industrial experience with long-term partnerships with universities and research institutes to innovate in seal geometry, tolerances, and surface finishes.

Custom Solutions for Special Conditions

Whether you need low-friction seals for high-speed rods, high-temperature compounds, or seals adapted to contaminated or abrasive environments, Polypac provides tailored Piston Rod Seal designs. Our engineering team supports prototyping, material selection, and performance validation to meet specific duty cycles and regulatory requirements.

Quality Assurance & Testing

Every seal undergoes rigorous dimensional inspection, material verification, and functional testing to ensure leak-tight performance. Our processes emphasize repeatability and traceability so customers can trust Polypac seals in critical hydraulic applications.

Why Choose Polypac

Polypac combines technical R&D, broad material capabilities, and large-scale manufacturing to deliver cost-effective, durable Piston Rod Seals. Contact us for samples, drawings review, or custom quotes — partner with a proven seal specialist for enhanced hydraulic reliability.

Piston Rod Seal Display

FAQ:

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.

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.

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.

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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Polypac Piston Rod Seal Solutions
Precision Sealing for Piston Rods
Materials & Technology
Manufacturing Excellence & Capacity
Custom Solutions for Special Conditions
Quality Assurance & Testing
Why Choose Polypac
Piston Rod Seal Display

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