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Spherical Lip Wiper: High-Performance Hydraulic Seals by Polypac

Spherical Lip Wiper — Precision Contamination Control

The Spherical Lip Wiper from Polypac is engineered to protect hydraulic rods and cylinders by efficiently scraping away contaminants while maintaining low friction and long service life. As a scientific and technical hydraulic seal manufacturer and oil seal supplier, Polypac combines advanced materials and tight manufacturing tolerances to deliver lip wipers that extend system uptime and reduce maintenance costs.

Superior Sealing Performance

Designed for demanding environments, the Spherical Lip Wiper provides consistent contact with surfaces to exclude dust, dirt, and fluid ingress. Polypac optimizes lip geometry and durometer profiles to balance lip compliance with wear resistance, ensuring dependable sealing performance across a wide range of pressures and temperatures.

Material Options & Customization

Polypac offers Spherical Lip Wiper solutions in a wide selection of materials — including NBR, FKM, EPDM, silicone, and FFKM — and advanced filled PTFE compounds (bronze, carbon, graphite, MoS₂, glass). Our 10,000+ m² facility and modern production equipment enable customized formulations and sizes to meet unique application requirements.

Applications & Industries

Ideal for mobile hydraulics, industrial cylinders, construction machinery, and precision equipment, the Spherical Lip Wiper protects against contaminants in harsh operating conditions. Its geometry suits reciprocating shafts and rods where contamination exclusion and minimal drag are essential for system efficiency.

Quality, Testing & Research Backing

Polypac’s R&D collaborations with universities and research institutions support continuous improvement of the Spherical Lip Wiper. Rigorous testing—wear, sealing, and contamination resistance—ensures each component meets industry performance standards and customer specifications.

Why Choose Polypac

Since 2008, Polypac has evolved from specialty PTFE seal production to a comprehensive supplier of O-rings and custom rubber rings. With an 8,000 m² factory space, advanced testing equipment, and extensive material knowledge, Polypac delivers Spherical Lip Wiper solutions that combine proven reliability with scalable customization and responsive technical support.

FAQ:

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

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.

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.

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.

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.

Table of Contents

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Spherical Lip Wiper — Precision Contamination Control
Superior Sealing Performance
Material Options & Customization
Applications & Industries
Quality, Testing & Research Backing
Why Choose Polypac

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