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

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Polypac Mobile Equipment Seal

Polypac Mobile Equipment Seals deliver durable, low-friction hydraulic and oil sealing for construction, agriculture, and mining machinery. Custom materials and advanced testing ensure reliable performance in harsh conditions.

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Product Description

Product Overview

Polypac Mobile Equipment Seal is engineered for demanding mobile machinery — excavators, loaders, tractors, cranes and other hydraulic systems. Backed by Polypac’s 8,000 m² production space and industry-leading testing equipment, these seals combine proven materials and custom design to keep your equipment running longer with less downtime.

Key Features

Durable materials: available in advanced PTFE composites (bronze, carbon, graphite, MoS₂, glass) and elastomers like NBR, FKM, EPDM, silicone, FFKM.
Low friction and wear resistance for longer life under heavy loads and high stroke speeds.
Chemical and temperature resilience — suitable for oils, fuels and extreme environments.
Precise fit and stable sealing performance under vibration and shock.
Custom solutions for special working conditions and tight tolerances.

Applications

Designed specifically for mobile equipment hydraulics and lubrication systems, Polypac seals are ideal for piston rods, hydraulic cylinders, rotary shafts and oil chambers in construction, agriculture, mining, forestry and material handling machines.

Why Choose Polypac

Founded in 2008, Polypac began with filled PTFE seals and has grown into a full-range seal manufacturer. Our factory spans over 10,000 m², with advanced production and testing capabilities. We collaborate with universities and research institutes to continuously improve materials and designs. Whether you need standard O-rings or bespoke PTFE solutions, Polypac offers fast prototyping, reliable quality control and scalable production.

Benefits at a Glance

Reduced maintenance and downtime
Improved equipment efficiency and lifespan
Flexible material choices to match your fluid and temperature needs
Expert customization for unique or extreme applications

Get Started

Contact Polypac for sample parts, drawings review, or a quote. Our team will help select the right material and design to maximize performance and cost-effectiveness for your mobile equipment.

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Question you may concern

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.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

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.

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.

If you have any other questions, please write email to us or call us , we will reply you as soon as possible.

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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.

UKH Piston Seal Kit | Single-Acting U-Cup with Anti-Extrusion Ring

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UKH Piston Seal Kit | Single-Acting U-Cup with Anti-Extrusion Ring