Oil Tank Piston Seals — Polypac Advanced Solutions

Oil Tank Piston Seals by Polypac: Performance Meets Durability

Polypac specializes in high-quality Oil Tank Piston Seals engineered for long life and reliable operation in hydraulic systems. Since 2008, our dedicated seal manufacturing and research teams have combined advanced filled PTFE compounds and a broad range of elastomers to deliver piston seals that resist wear, extrusion and chemical attack in demanding oil tank and hydraulic cylinder applications.

Precision Materials and Advanced Manufacturing

Our product range for Oil Tank Piston Seals includes bronze-filled PTFE, carbon-filled PTFE, MoS₂-filled PTFE and glass-filled PTFE, backed by NBR, FKM, EPDM, silicone and FFKM O-rings where elastomeric support is required. With an 8,000 m² factory space and state-of-the-art production and testing equipment, Polypac ensures consistent tolerances, low friction and optimal sealing performance across operating pressures and temperatures.

Custom Solutions for Special Working Conditions

Polypac understands that oil tank piston environments vary—contaminants, extreme temperatures, high pressures and aggressive fluids demand tailored sealing strategies. We provide custom seal profiles, compound formulations and O-ring pairings to meet specific application needs, working closely with clients and research institutions to validate performance in real-world conditions.

Rigorous Quality Assurance and Testing

Quality is engineered into every Oil Tank Piston Seal. Our in-house testing capabilities include dimensional inspection, material analysis, friction and wear testing, and simulated lifecycle evaluations. Long-term collaborations with universities and research centers reinforce our data-driven approach to durability and reliability.

Why Choose Polypac

As one of China’s leading seal manufacturers, Polypac combines scale, expertise and innovation to deliver cost-effective, high-performance piston seals. Whether you need off-the-shelf parts or fully customized sealing systems, our experienced team provides engineering support, rapid prototyping and production scalability to keep your hydraulic systems sealed and operating efficiently.

Contact and Customization

Contact Polypac to discuss your Oil Tank Piston Seals requirements. From material selection to prototype validation and mass production, we offer end-to-end sealing solutions that prioritize performance, longevity and serviceability.

Oil Tank Piston Seals Display

FAQ:
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.

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.

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 purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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.

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