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Wiper Seal Solutions by Polypac: Durable Hydraulic Protection

Wiper Seal — Essential Protection for Hydraulic Systems

Wiper Seal by Polypac prevents contaminants from entering hydraulic cylinders, protecting rods and internal seals. Designed for harsh environments, our wiper seals combine low friction with superior scraping action to remove dirt, dust, and moisture before damage occurs. Polypac leverages decades of sealing expertise to deliver reliable, long-life solutions tailored to demanding applications.

Performance & Material Options

Polypac offers wiper seals in a wide range of materials including NBR, FKM, EPDM, silicone, FFKM, and a variety of filled PTFE compounds (bronze, carbon, graphite, MoS₂, glass). Each material is selected to meet temperature, chemical compatibility, and abrasion-resistance requirements, ensuring optimal performance for mobile hydraulics, construction equipment, and industrial cylinders.

Precision Manufacturing & Quality Control

Our custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space. Advanced production and testing equipment enable tight tolerances, consistent lip geometry, and repeatable sealing performance. Polypac maintains strict QA protocols and long-term R&D cooperation with universities and institutes to continuously improve wiper seal life and leakage prevention.

Customization for Special Conditions

Whether you need bespoke sizes, compound formulations, or multi-component seals, Polypac designs wiper seals for special working conditions such as high-speed rods, contaminated environments, or extreme temperatures. Our engineering team provides rapid prototyping, material selection guidance, and performance testing to match application-specific requirements.

Benefits & Applications

Key benefits include contamination exclusion, extended seal and rod life, reduced maintenance costs, and improved system reliability. Typical applications: hydraulic cylinders, telescopic booms, pneumatic actuators, and industrial presses. Polypac’s wiper seals are ideal where uptime and protection matter most.

Get a Quote

Contact Polypac for expert advice, material selection, and competitive quotes on Wiper Seals and full sealing systems. As one of China’s leading hydraulic seal manufacturers, Polypac delivers engineered solutions that perform.

Wiper Seal Display

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.

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.

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.

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.

Table of Contents

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Wiper Seal — Essential Protection for Hydraulic Systems
Performance & Material Options
Precision Manufacturing & Quality Control
Customization for Special Conditions
Benefits & Applications
Get a Quote
Wiper Seal Display

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