dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Piston Rod Seal Supplier — Polypac Hydraulic & Oil Seals

Polypac is a leading piston rod seal supplier offering custom hydraulic seals, PTFE-filled seals, and O-rings (NBR, FKM, silicone, EPDM, FFKM). Advanced factory and testing ensure reliable sealing solutions for demanding conditions.

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Product Details

Piston Rod Seal Supplier — Reliable Sealing from Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier dedicated to producing high-performance piston rod seals. Since 2008, we have combined advanced production equipment, a 10,000 m² custom rubber and O-ring facility, and ongoing research partnerships to deliver durable, precision sealing solutions.

Why Choose Polypac Piston Rod Seals?

As a trusted piston rod seal supplier, Polypac focuses on practicality and long-term value. Our seals reduce leakage, extend cylinder life, and improve machine reliability. We serve hydraulic systems across industries—construction machinery, industrial presses, and mobile equipment—providing tailored seals for your working conditions.

Custom Materials for Real Conditions

We offer a wide range of materials to meet temperature, chemical and wear requirements, including NBR, FKM, silicone, EPDM, and FFKM. Starting from filled PTFE expertise (bronze, carbon, graphite, MoS₂, glass), our PTFE seals are ideal where low friction and long life are essential.

Advanced Manufacturing & Testing

Polypac's factory spans over 8,000 m² of production space and uses industry-leading equipment for molding, machining, and quality testing. This ensures consistent dimensions, material integrity, and performance under pressure. Our long-term collaborations with universities and research institutes strengthen product development and certification.

Products & Services

We supply piston rod seals, hydraulic seals, oil seals, and custom O-rings. Services include material selection support, custom design, rapid prototyping, and volume manufacturing. Whether you need PTFE-filled bearings or resilient elastomer O-rings, Polypac delivers solutions that fit your budget and timeline.

Get Sealing Confidence

Choose Polypac as your piston rod seal supplier for proven quality, customized options, and responsive service. Contact us to discuss application requirements and receive a tailored sealing recommendation. Your equipment deserves seals engineered for reliability.

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FAQ

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.

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.

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.

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.

If you have any questions or concern, please contact us.

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