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Single Lip Wiper Seals — Reliable Contamination Protection by Polypac

Single Lip Wiper Seals by Polypac

High-performance design

Our Single Lip Wiper is engineered to remove contaminants from piston rods and shafts efficiently while minimizing fluid loss. Designed for dynamic sealing environments, the Single Lip Wiper reduces abrasive wear and prevents dirt ingress, improving system reliability and reducing maintenance intervals.

Material and manufacturing excellence

Polypac manufactures Single Lip Wiper seals using High Quality elastomers and specialty composites. Beginning with our heritage in filled PTFE (bronze, carbon, graphite, MoS2, glass-filled), we've expanded to NBR, FKM, EPDM, silicone and FFKM for tailored compatibility. With a 10,000+ m² facility and 8,000 m² production space, our advanced equipment delivers consistent tolerances and repeatable performance.

Custom solutions for special conditions

Every application has unique demands. Polypac provides custom Single Lip Wiper dimensions, shore hardness and compound blends suited to extreme temperatures, aggressive fluids, or abrasive environments. Our R&D partnerships with universities and research institutes enable rapid development of bespoke sealing compounds and geometries.

Quality control and testing

Rigorous testing ensures every Single Lip Wiper meets performance targets. Our in-house testing capabilities simulate pressure, speed and contaminant exposure to validate longevity and sealing effectiveness. Traceability, batch control and material certifications are standard for critical applications.

Applications and benefits

Ideal for hydraulic cylinders, mobile equipment, construction machinery and industrial actuators, the Single Lip Wiper provides superior contaminant exclusion while preserving rod finish. Benefits include extended component life, reduced downtime, and lower lifecycle costs.

Why choose Polypac

Founded in 2008, Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier focused on sealing material development and customized sealing solutions. As one of China’s leading seal producers, we combine decades of material expertise, advanced production lines and global R&D collaborations to deliver reliable Single Lip Wiper seals that perform in the field.

Single Lip Wiper Display

FAQ:

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.

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.

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.

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.

Table of Contents

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Single Lip Wiper Seals by Polypac
High-performance design
Material and manufacturing excellence
Custom solutions for special conditions
Quality control and testing
Applications and benefits
Why choose Polypac
Single Lip Wiper Display

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