Polypac Excavator Piston Seals — Durable Hydraulic Solutions

Polypac Excavator Piston Seals — Precision Sealing for Heavy Equipment

Overview

Polypac specializes in manufacturing high-reliability excavator piston seals designed for the most demanding hydraulic systems. Our seals are engineered to provide exceptional sealing performance in high-pressure, high-speed and contaminated environments common to construction equipment. Whether for new builds or retrofit projects, Polypac's excavator piston seals ensure leak-free operation and longer maintenance intervals.

Materials & Performance

We offer a broad range of materials including bronze-, carbon-, graphite-, MoS₂- and glass-filled PTFE for low friction and high wear resistance, alongside elastomers such as NBR, FKM, silicone, EPDM and FFKM for optimal compatibility with oils and extreme temperatures. Each compound is selected to balance friction, extrusion resistance and chemical compatibility so your excavator piston seals perform reliably under shock loads, abrasive particles and thermal cycling.

Manufacturing & Quality

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading manufacturing and testing equipment. Founded in 2008, we combine decades of material expertise with strict QA processes and collaborative R&D with top universities and research institutes to validate seal life, hardness, and dimensional precision for excavator piston seals.

Customization & Application

Every fleet and hydraulic circuit is different. Polypac provides bespoke sealing solutions — from profile redesigns to compound tuning — to meet unique working conditions like high contamination, deep mud, saltwater exposure, or extreme heat. Our custom O-rings and rubber rings complement excavator piston seals to create complete, reliable sealing systems tailored to your equipment.

Why Choose Polypac

As one of China’s largest dedicated seal manufacturers, Polypac combines material science, precision manufacturing and field-proven designs to lower downtime and total cost of ownership. Contact us for sample kits, material data sheets and application-specific recommendations — and experience excavator piston seals engineered to keep your hydraulics running stronger, longer.