Piston Rod Seal Replacement Parts - Polypac Precision Seals

Piston rod seal replacement parts - Polypac

High Quality piston rod seal replacement parts for reliable performance

Polypac offers a complete range of piston rod seal replacement parts engineered for longevity and leak-free operation in hydraulic cylinders. Our seals combine advanced polymers and filled PTFE compounds with precision molding to ensure consistent sealing across pressures, temperatures, and harsh environments. Whether you need standard rod seals or specialized solutions, our products minimize downtime and maintenance costs while maximizing system efficiency.

Materials & compatibility

We manufacture piston rod seal replacement parts using a spectrum of materials including NBR, FKM, EPDM, silicone, and high-performance FFKM, plus filled PTFE (bronze, carbon, graphite, MoS2, glass). These materials are selected for compatibility with hydraulic fluids, temperature ranges, and abrasive conditions. Material choice and design optimization ensure proper friction control and wear resistance for both new builds and retrofit applications.

Advanced manufacturing & quality testing

Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space equipped with industry-leading molding and testing equipment. Our seals undergo dimensional inspection, material analysis, and pressure endurance tests. Long-term partnerships with universities and research institutions support continuous improvement and innovation in seal performance and reliability.

Customized solutions for special working conditions

From heavy-duty construction machinery to precision industrial hydraulics, Polypac designs piston rod seal replacement parts tailored to your application. We provide custom compound development, tailored cross-sections, and integrated sealing systems to address rod misalignment, contamination, and extreme temperatures.

Why choose Polypac

Founded in 2008, Polypac is a scientific and technical hydraulic seal manufacturer committed to quality, responsiveness, and engineering support. We deliver competitive lead times, technical datasheets, and OEM-grade replacements. Choose Polypac for proven sealing expertise, scalable production, and reliable piston rod seal replacement parts that keep your hydraulics running.

Ordering & technical support

Contact our sales and engineering team for material recommendations, CAD drawings, sample trials, and volume quotes. Polypac provides end-to-end support from specification to delivery, ensuring you get the right piston rod seal replacement parts for your equipment.

Piston rod seal replacement parts Display

FAQ:
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.

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 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.

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