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Polypac Hydraulic Seals — Durable Sealing Solutions

Polypac offers high-performance hydraulic seals and O-rings, including PTFE-filled variants and multiple rubber compounds. Advanced production and testing ensure reliable, long-lasting sealing solutions customized for demanding conditions.

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Product Information

Polypac Hydraulic Seals — Reliable Sealing for Demanding Conditions

Polypac is a scientific and technical manufacturer focused on hydraulic seals and oil seals. With a 10,000+ m² facility and 8,000 m² production space, we combine modern equipment and research partnerships to deliver seals that reduce leakage, extend service life, and lower maintenance costs.

Why Choose Polypac Hydraulic Seals?

Proven reliability: Designed to withstand high pressure, temperature swings, and abrasive environments.
Advanced materials: Filled PTFE and elastomers for low friction and strong wear resistance.
Custom solutions: Tailored seals and O-rings to meet special working conditions and designs.
Quality control: Modern testing equipment and collaboration with universities ensure consistent performance.

Materials & Custom Options

We began in 2008 producing filled PTFE seals and have expanded to many materials. Common options include:

PTFE variants: bronze-filled, carbon-filled, graphite-filled, MoS₂-filled, and glass-filled — ideal for low friction and high wear resistance.
Elastomers for O-rings: NBR, FKM, silicone, EPDM, and FFKM — chosen for chemical compatibility, temperature range, and elasticity.
Custom formulations and sizes: Designed to meet special pressures, speeds, or media.

Applications & Performance

Polypac hydraulic seals are suitable for hydraulic cylinders, pumps, valves, and other oil-sealing applications across construction, agriculture, industrial machinery, and energy. Benefits include:

Reduced leakage and downtime
Lower friction for smoother operation
Longer service intervals and overall cost savings

Our experienced team provides technical support to help you select the right seal, material, and tolerance. Whether you need standard O-rings or a specialized PTFE sealing solution, Polypac delivers practical, tested, and customized products that protect your equipment and improve system reliability.

Contact Polypac to discuss specifications, samples, and custom production options.

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FAQ

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.

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 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.

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.

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

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dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

GSJ Piston Seal: A Double-Acting Hydraulic Seal for Zero Leakage

Polypac GSJ Piston Seal is a double-acting hydraulic seal designed for zero leakage, ensuring maximum efficiency and durability in hydraulic systems. Ideal for high-performance applications, this piston seal offers reliable sealing solutions to enhance your machinery’s lifespan and operation.

GSJ Piston Seal: A Double-Acting Hydraulic Seal for Zero Leakage