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

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Polypac Hydraulic Piston Rod Seal Kit

Polypac Hydraulic Piston Rod Seal Kit offers reliable, low-friction sealing for hydraulic cylinders. Built with premium materials and precise testing, it reduces leakage, extends service life, and supports custom solutions for demanding conditions.

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Product Description

Product Overview

The Polypac Hydraulic Piston Rod Seal Kit is designed to provide dependable sealing for hydraulic cylinders in industrial and mobile equipment. Combining advanced materials and precision manufacturing, this kit minimizes leakage, lowers friction, and extends piston rod and cylinder life. Suitable for construction machinery, agricultural equipment, presses, and many other hydraulic systems.

Key Features

Reliable sealing against high pressure and contamination
Low friction design to reduce wear and improve efficiency
Wide material options: filled PTFE variants, NBR, FKM, EPDM, silicone, FFKM
Custom sizes and compounds available for special working conditions
Precision manufacturing and rigorous testing to ensure consistent performance

Performance Benefits

Using Polypac seal kits helps reduce downtime and maintenance costs by preventing oil leakage and protecting internal components from abrasive particles. Low-friction materials cut energy consumption and heat generation, while durable compounds extend service intervals. Our kits are engineered for smooth rod movement and long-term reliability.

Applications

Polypac Hydraulic Piston Rod Seal Kits are ideal for:

Hydraulic cylinders in construction and mining equipment
Mobile hydraulics for trucks and agricultural machinery
Industrial presses, injection molding machines, and lifts
Custom machinery operating under extreme temperatures or contaminated environments

Why Choose Polypac

Polypac is a scientific and technical seal manufacturer with over a decade of experience. Our custom rubber ring and O-ring factory covers more than 10,000 m², with 8,000 m² of factory space and advanced production and testing equipment. We began in 2008 with filled PTFE seals and now offer a full range of materials and tailored solutions. Long-term collaborations with universities and research institutes ensure continuous improvement and reliable sealing solutions.

Ordering & Customization

We provide ready-made kits and bespoke solutions. Share your cylinder dimensions, working pressure, temperature range, and media, and our engineering team will recommend the optimal material and design. Contact Polypac for samples, technical drawings, and volume pricing. Keep your hydraulics running cleaner and longer with Polypac seal technology.

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Question you may concern

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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 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.

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.

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