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

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Polypac Rod Seals — Custom Hydraulic Rod Seal Supplier

Polypac designs and manufactures high-performance rod seals and O-rings using advanced materials and testing. With custom solutions, large capacity, and rapid quotes, we deliver durable, low-friction seals for harsh hydraulic conditions.

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Product Information

Polypac Rod Seals — Reliable sealing for demanding hydraulic systems

Polypac is a scientific and technical manufacturer specializing in hydraulic seals and oil seals. Our rod seals are engineered for long life, low friction, and reliable leak prevention in cylinders, valves, and hydraulic equipment. We combine advanced materials and precise manufacturing to solve real-world sealing challenges.

Why choose Polypac rod seals?

Custom materials: PTFE (bronze, carbon, graphite, MoS₂, glass filled) and elastomers including NBR, FKM, silicone, EPDM, FFKM.
Proven durability: Low wear and stable performance under high pressure, temperature, and aggressive media.
Large production capacity: Factory covers over 10,000 m² with 8,000 m² of production space and advanced testing equipment.
Research-backed quality: Long-term partnerships with universities and research institutes ensure up-to-date sealing technology.

Custom solutions for special working conditions

Whether you need a standard rod seal or a tailored O-ring, Polypac offers fast customization. We assess working temperature, pressure, speed, and fluid compatibility to recommend the best material and profile. Our experienced team provides prototypes, sample testing, and volume production to meet OEM and aftermarket needs.

Manufacturing excellence

Founded in 2008, Polypac began with filled PTFE seals and expanded to a full range of rubber rings and O-rings. Our modern production lines and rigorous quality control mean consistent dimensions, tight tolerances, and reliable performance across batches.

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Choose Polypac for rod seals that reduce downtime and extend equipment life. Contact us for technical support, sample orders, and fast quotes—let our sealing experts design the right solution for your hydraulic application.

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Question you may concern

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 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.

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.

If you have any other questions, please write email to us or call us , we will reply you as soon as possible.

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