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

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Polypac Oil Tank Piston Seals

High-performance Oil Tank Piston Seals from Polypac deliver reliable, leak-free operation in hydraulic and oil tank systems. Custom sizes, advanced materials, and strict testing ensure durability in demanding environments.

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Product Description

Product Overview

Polypac Oil Tank Piston Seals are engineered to provide reliable, long-lasting sealing performance in oil tanks, hydraulic pistons, and related equipment. Built with a focus on durability and leak prevention, these piston seals reduce maintenance, extend component life, and keep systems running smoothly under pressure.

Key Features

Excellent sealing under high pressure and temperature variations
Low friction for smooth piston movement and reduced wear
Resistant to oils, fuels, and many hydraulic fluids
Available in custom sizes and designs to fit special working conditions

Materials & Manufacturing

Polypac combines advanced materials like filled PTFE variants (bronze, carbon, graphite, MoS₂, glass) with elastomers such as NBR, FKM, silicone, EPDM, and FFKM. Our production uses industry-leading equipment and rigorous testing to ensure each piston seal meets performance expectations. Founded in 2008, Polypac has expanded from PTFE seals to a full range of O-rings and rubber seals, supported by an 8,000 m² factory and a 10,000 m² facility footprint.

Applications

Polypac Oil Tank Piston Seals are ideal for:

Hydraulic cylinders and pistons
Oil and fuel tanks requiring reliable piston sealing
Mobile and industrial machinery
Customized equipment operating in extreme or contaminated environments

Why Choose Polypac

Choosing Polypac means choosing proven expertise. As a scientific and technical seal manufacturer, we collaborate with universities and research institutions to develop better sealing solutions. Our large-scale factory, advanced testing, and commitment to custom solutions ensure you get seals tailored to your needs, backed by quality control and fast delivery.

Simple Purchase & Support

We offer easy customization, responsive technical support, and volume production capabilities. Whether you need a standard piston seal or a specialized design for harsh conditions, Polypac provides a cost-effective, durable solution.

Contact us to discuss specifications, sample requests, or bulk orders—Polypac makes sealing simple and dependable.

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FAQ

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.

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.

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.

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.

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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.

GSF Piston Seals for Straight Cylinders | Bidirectional Seals for Ram & Plunger Cylinders

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GSF Piston Seals for Straight Cylinders | Bidirectional Seals for Ram & Plunger Cylinders