dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Polypac Rod Seal Kit for Hydraulic Cylinders

Polypac rod seal kit delivers reliable, long-lasting sealing for hydraulic cylinders. Made from advanced PTFE and elastomers with custom options, it reduces leaks and downtime in harsh conditions.

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Product Description

Overview

The Polypac Rod Seal Kit for hydraulic cylinders provides dependable sealing for rod applications in construction, agriculture, industrial machinery, and mobile equipment. Designed for easy installation and long service life, this kit combines advanced materials and precise manufacturing to minimize leakage and maintenance.

Key Features

Durable Materials

Polypac uses proven materials including filled PTFE (bronze, carbon, graphite, MoS₂, glass) and high-quality elastomers like NBR, FKM, EPDM, and silicone. These choices offer excellent wear resistance, low friction, and good chemical compatibility for a wide range of fluids and temperatures.

Complete Kit

Each rod seal kit typically includes the primary rod seal, wiper/dust seal, backup ring(s) and O-rings where needed. The full set ensures both internal sealing and external contamination protection for longer system life.

Benefits

Reduced Downtime

Reliable sealing reduces leaks and extends maintenance intervals, saving time and operating costs.

Custom Options

Polypac offers custom sizes and compound selections for special working conditions. Whether you need high temperature resistance, low friction, or aggressive fluid compatibility, we can supply tailored solutions.

Why Choose Polypac

Founded in 2008, Polypac is a scientific and technical manufacturer focused on seals and sealing materials. With over 10,000 m² of production space and advanced testing equipment, we collaborate with universities and labs to deliver quality products. Our experience with filled PTFE and a wide range of elastomers ensures you get a rod seal kit that fits precisely and performs reliably.

Applications

Ideal for hydraulic cylinders in construction machinery, forklifts, presses, agricultural equipment, and custom industrial systems. Suitable for harsh environments where durability and leak prevention are critical.

Ordering & Support

Polypac provides technical support to select the right kit for your cylinder. Contact us with bore and rod dimensions, operating pressure, fluid type and temperature range to get a tailored recommendation.

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Question you may concern

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.

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.

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.

If you have another questions, please feel free to contact us.

Get in Touch

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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