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

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Polypac High Pressure Piston Seal

Polypac High Pressure Piston Seal offers reliable sealing for demanding hydraulic systems. Advanced materials, precision manufacturing, and custom solutions ensure long life and leak-free performance in extreme conditions.

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Product Description

Product Overview

The Polypac High Pressure Piston Seal is engineered for demanding hydraulic applications where reliability and longevity matter. Designed to withstand high pressures and frequent reciprocating motion, this seal minimizes leakage and reduces maintenance downtime. Available in advanced PTFE-filled compounds and a range of elastomers, it meets diverse operating environments.

Key Features

High Pressure Performance

Optimized profile and material selection ensure consistent sealing under high-pressure conditions. The seal maintains contact and stability across a wide pressure range, delivering leak-free operation for cylinders and pistons.

Durable Materials

Polypac uses a variety of materials including bronze-filled PTFE, carbon-filled PTFE, graphite PTFE, MoS2-filled PTFE and glass-filled PTFE, plus elastomers like NBR, FKM, EPDM, silicone and FFKM. This range allows the right balance between friction, wear resistance and chemical compatibility.

Precision Manufacturing

Manufactured in Polypac’s modern facilities with advanced production and testing equipment, each seal is produced to tight tolerances for consistent quality and interchangeability.

Applications

Ideal for hydraulic cylinders, construction machinery, heavy equipment, and industrial presses. The seal performs well in high-pressure piston applications where reliability, low leakage and long service life are required.

Why Choose Polypac

Proven Experience

Founded in 2008, Polypac specializes in seal production, sealing material development and customized sealing solutions. Our 10,000+ sqm facility and collaborations with universities and research institutes support continuous innovation and quality control.

Custom and Tested Solutions

Polypac offers tailored seals for special working conditions. Extensive testing ensures each product meets performance expectations, giving customers confidence and reducing field failures.

Specifications & Materials

Standard sizes available; custom dimensions on request. Material options include filled PTFE variants for extreme wear resistance and a full range of elastomers for sealing versatility. Contact Polypac for material recommendations based on pressure, temperature and fluid type.

With clear product design, advanced materials and a commitment to quality, the Polypac High Pressure Piston Seal is a dependable choice for critical hydraulic applications.

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Question you may concern

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.

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.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

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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.

DAQ2 Piston Seal Kit | Enhanced U-Cup with Anti-Extrusion Rings

Polypac’s DAQ2 Piston Seal Kit features enhanced U-cups with anti-extrusion rings, designed for high pressure piston seal applications. Ideal for metric piston seal kits, it ensures superior durability and reliable performance in industrial hydraulic seal systems.

DAQ2 Piston Seal Kit | Enhanced U-Cup with Anti-Extrusion Rings