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Polypac Compact Piston Seal — Reliable Low-Friction Hydraulic Seal

Polypac Compact Piston Seal offers low friction, long life and reliable sealing for hydraulic cylinders. Customizable materials and sizes, produced in our advanced factory since 2008.

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Product Details

Polypac Compact Piston Seal — Performance Meets Durability

The Polypac Compact Piston Seal is designed for modern hydraulic cylinders that demand compact installation, low friction and long-term leak protection. Engineered for smooth operation and minimal wear, this piston seal reduces energy loss and extends system life while fitting tight groove spaces.

Key Benefits

Low friction for improved efficiency and reduced heat
High-pressure capability for demanding hydraulic systems
Long service life with excellent wear resistance
Compact design ideal for limited-space applications
Easy installation and reliable sealing performance

Materials & Compatibility

Polypac offers Compact Piston Seals in a range of proven materials to match working conditions: filled PTFE variants (bronze, carbon, graphite, MoS2, glass) and elastomers such as NBR, FKM, EPDM, silicone and FFKM. Choose the best combination for temperature range, chemical exposure and pressure.

Typical Applications

Used widely in hydraulic cylinders for construction equipment, industrial machinery, mobile hydraulics and special-purpose systems where space is limited but performance cannot be compromised.

Why Choose Polypac

Polypac is a scientific and technical hydraulic seal manufacturer with specialty in sealing material development and tailored solutions for special working conditions. Our custom rubber ring and O-ring factory covers over 10,000 m2 with 8,000 m2 of production space and advanced testing equipment. Since 2008 we have expanded from filled PTFE seals to a broad range of O-rings and seals, and we collaborate closely with universities and research institutes for ongoing innovation.

Customized Service

We provide custom sizes, tailored materials and rapid prototyping to meet unique cylinder designs. Whether you need improved chemical resistance, higher temperature tolerance or ultra-low friction, Polypac can deliver a solution optimized for your application.

Get Started

Contact Polypac for datasheets, sample orders or design support. Upgrade your hydraulic system with a compact piston seal that delivers reliable sealing, lower maintenance and better performance.

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Q&A

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.

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.

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.

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.

If you don’t find your answer, please E-mail us and we’ll be happy to help you out.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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