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

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Polypac Special Profile Seal

Polypac Special Profile Seals are custom-designed hydraulic and oil seals delivering superior leak prevention, long service life, and excellent resistance to chemicals and extreme temperatures. Ideal for demanding industrial applications.

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Product Description

Overview

Polypac Special Profile Seals combine precision design, advanced materials, and rigorous testing to meet the needs of hydraulic and oil systems in harsh environments. As a trusted seal manufacturer, Polypac offers customized profiles to ensure perfect fit, reliable sealing, and extended equipment life.

Why Choose Polypac Special Profile Seals

Customized for Your Application

Every component can be tailored—geometry, hardness, and material—to match your machine’s tolerances and operating conditions. That means fewer leaks, less downtime, and better overall performance.

High Quality Materials & Proven Manufacturing

Starting with filled PTFE variants and expanding into NBR, FKM, silicone, EPDM, and FFKM, Polypac selects the right compound for wear resistance, chemical compatibility, and temperature stability. Our 10,000+ m² facility and advanced production and testing equipment ensure consistent quality from prototype to mass production.

Reliable in Extreme Conditions

Designed for high pressure, abrasive media, wide temperature ranges, and special working environments, these seals maintain sealing integrity where standard parts fail.

Key Benefits

Leak-tight performance across pressure and temperature ranges
Reduced maintenance and longer service intervals
Fast turnaround on custom profiles and small-batch runs
Compatibility with hydraulic fluids, oils, and many chemicals
Strong R&D support through partnerships with universities and research institutions

About Polypac

Founded in 2008, Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier. With one of China’s largest custom rubber ring and O-ring factories, we focus on sealing material development and tailored solutions for special working conditions.

Get Started

Contact Polypac for a quote or to discuss a custom profile. Whether you need a one-off prototype or volume supply, our team delivers solutions engineered for reliability and cost-effectiveness. Protect your equipment with seals built for the toughest jobs.

Detailed display

Question you may concern

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 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.

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.

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.

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

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PRODUCTS

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.

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