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Cylinder Scraper Seal - Polypac Custom Hydraulic Seals

Cylinder Scraper Seal Solutions by Polypac

Overview

Polypac's Cylinder Scraper Seal line is engineered to deliver reliable rod protection and contaminant exclusion for hydraulic and pneumatic cylinders. Designed for efficient removal of dirt, water and debris while minimizing friction and wear, our Cylinder Scraper Seal products safeguard system integrity, reduce downtime and extend service life across construction, agriculture, mining and industrial machinery.

Materials & Construction

We manufacture Cylinder Scraper Seals in a wide range of high-performance materials including filled PTFE (bronze, carbon, graphite, MoS2, glass), NBR, FKM, EPDM, silicone and FFKM. Each compound is selected to match temperature, chemical exposure and abrasion demands. Our seals combine resilient elastomeric lips with reinforced PTFE scraping edges where required, offering low friction, excellent wear resistance and superior extrusion control.

Performance & Applications

Cylinder Scraper Seal designs from Polypac excel in harsh environments—removing particulate contamination while maintaining lubrication film and preventing ingress. Typical applications include hydraulic cylinders, excavator booms, loaders, presses and offshore equipment. Our seals are optimized for minimal leakage, stable dynamic performance and compatibility with common hydraulic fluids and greases.

Customization & Quality Assurance

Founded in 2008, Polypac operates a custom rubber ring and O-ring factory covering more than 10,000 m2 with 8,000 m2 of production space. We offer custom sizing, profile modification and specialized compound development for unique working conditions. Advanced production and testing equipment, combined with collaborations with universities and research institutes, ensure consistent quality, dimensional precision and validated performance under real-world loads.

Why Choose Polypac

As a scientific and technical hydraulic seal manufacturer and oil seal supplier, Polypac provides end-to-end solutions—from material selection to prototyping and serial production. Our Cylinder Scraper Seal portfolio balances durability, cost-effectiveness and ease of installation. Contact Polypac for datasheets, custom quotes and application engineering support to specify the right scraper seal for your machinery.

Cylinder Scraper Seal 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.

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 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 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.

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.

Table of Contents

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Cylinder Scraper Seal Solutions by Polypac
Overview
Materials & Construction
Performance & Applications
Customization & Quality Assurance
Why Choose Polypac
Cylinder Scraper Seal Display

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