Polypac Rod Seal Manufacturer - Precision Hydraulic Rod Seals

Polypac provides durable, precision rod seals and O-rings for hydraulic systems. With advanced materials, a large factory, and customized solutions, Polypac ensures reliable, leak-free performance.

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Product Information

Product Overview

Polypac rod seals are designed to deliver long-lasting, leak-free performance in hydraulic cylinders and other rod-driven applications. Backed by over a decade of research and manufacturing experience, our seals combine proven materials and strict quality control to meet demanding working conditions.

Why Choose Polypac Rod Seals

Reliable sealing: Engineered to prevent fluid leakage under high pressure and repeated motion.
Durable materials: We use filled PTFE variants and a wide range of elastomers to match temperature, chemical, and wear requirements.
Advanced production: Our facility spans more than 10,000 m² with 8,000 m² of production space and industry-leading testing equipment.
Trusted expertise: Founded in 2008, Polypac collaborates with universities and research institutions to continuously improve seal performance.

Materials and Options

Polypac offers rod seals in a variety of materials to suit different environments:

Filled PTFE: bronze, carbon, graphite, MoS₂, and glass-filled PTFE for low friction and high wear resistance.
Elastomers: NBR, FKM, silicone, EPDM, and FFKM for flexibility and chemical compatibility.
O-rings and rubber rings: Custom sizes and compounds for static and dynamic sealing.

Customization and Testing

We provide tailored sealing solutions for special working conditions. Whether you need high-temperature resistance, aggressive fluid compatibility, or extended wear life, our engineers will recommend the right compound and design. Every batch undergoes strict testing to ensure dimensional accuracy, material properties, and sealing performance.

Applications

Polypac rod seals are suitable for hydraulic cylinders in industries such as construction machinery, agricultural equipment, mining, marine systems, and industrial automation.

Trust and Support

Choosing Polypac means choosing a partner focused on quality and service. With modern production lines, professional R&D, and responsive customer support, we help you select the correct seal and provide reliable supply for your projects.

For custom designs or technical inquiries, contact Polypac to get a quote and expert recommendations for your rod sealing needs.

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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.

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.

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.

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.

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