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Polypac High Temperature Piston Rod Seal Solutions

Polypac High Temperature Piston Rod Seal Solutions

Overview

Polypac specializes in High temperature piston rod seal systems engineered to withstand elevated temperatures, high pressures and aggressive fluids. Founded in 2008, we combine 15+ years of sealing expertise with advanced materials including filled PTFE variants and high-performance elastomers (NBR, FKM, silicone, EPDM, FFKM) to deliver durable, reliable seals for hydraulic and pneumatic applications.

Materials and Performance

Our High temperature piston rod seal portfolio uses bronze-filled, carbon-filled, graphite PTFE and MoS2-filled PTFE for excellent thermal stability and low friction. For dynamic sealing under heat, FKM and FFKM elastomers provide chemical resistance and long service life. Material selection is optimized by analyzing temperature ranges, pressure, speed and fluid compatibility to minimize wear, extrusion and leakage.

Typical Applications

Designed for heavy industry, our High temperature piston rod seals are used in hydraulic cylinders for steel mills, forging presses, petrochemical actuators, power generation turbines and offshore equipment. They maintain sealing integrity where conventional seals fail, offering reduced downtime and predictable maintenance intervals.

Customization and Testing

Polypac operates a custom rubber ring and O-ring factory covering over 10,000 m2 with 8,000 m2 of production space. We provide tailored geometries, surface finishes and composite solutions for special working conditions. All designs undergo rigorous testing—thermal cycling, pressure endurance, friction and wear tests—ensuring field-proven performance before delivery.

Why Choose Polypac

As one of China’s largest seal manufacturers, Polypac pairs industrial-scale production with academic collaboration and R&D partnerships. Our advanced production and testing equipment, plus long-term cooperation with universities and research institutes, ensure innovative sealing solutions backed by data and experience.

Ordering and Support

We offer fast prototyping, volume manufacturing and global technical support. Contact Polypac for material recommendations, CAD drawings and application-specific sealing strategies to optimize lifecycle cost and uptime for your High temperature piston rod seal requirements.

High temperature piston rod seal Display

FAQ:

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.

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.

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.

Table of Contents

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Polypac High Temperature Piston Rod Seal Solutions
Overview
Materials and Performance
Typical Applications
Customization and Testing
Why Choose Polypac
Ordering and Support
High temperature piston rod seal Display

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