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Polypac Piston Seals — Reliable Hydraulic Sealing Solutions

Polypac Piston Seals — Performance, Precision, Professionalism

Overview

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier delivering durable piston seals for a wide range of industries. As experienced piston seal suppliers, we combine decades of materials knowledge with modern production to provide low-friction, long-life sealing solutions that minimize leakage and maintenance costs.

Advanced Materials & Product Range

We manufacture piston seals in filled PTFE (bronze, carbon, graphite, MoS₂, glass), as well as elastomers including NBR, FKM, silicone, EPDM and FFKM. This diverse material portfolio lets Polypac optimize wear, friction, chemical resistance and temperature tolerance for each application—ensuring the right piston seal for mobile hydraulics, industrial cylinders, and specialized equipment.

Custom Manufacturing & R&D

Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading equipment for molding, machining and inspection. We partner with universities and research institutes to develop new compounds and design bespoke piston seals for extreme pressures, abrasives, or temperature cycles.

Testing & Quality Assurance

Every piston seal undergoes rigorous dimensional, material and performance testing to meet customer specifications. Our production control and QA protocols ensure consistent extrusion resistance, dynamic sealing performance and extended service life—reducing downtime and replacement frequency.

Applications & Benefits

Polypac piston seals are engineered for hydraulic cylinders, construction machinery, agricultural equipment, oil & gas systems and precision industrial actuators. Benefits include enhanced sealing reliability, reduced frictional losses, improved energy efficiency and tailored resistance to fluids and contaminants.

Why Choose Polypac

Choose Polypac for proven expertise among piston seal suppliers: comprehensive material options, scalable production, advanced testing, and custom engineering support. Contact us for consultation, prototypes or volume supply to optimize your hydraulic sealing performance.

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FAQ:

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.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

Table of Contents

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Polypac Piston Seals — Performance, Precision, Professionalism
Overview
Advanced Materials & Product Range
Custom Manufacturing & R&D
Testing & Quality Assurance
Applications & Benefits
Why Choose Polypac
piston seal suppliers Display

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