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Spring Energized Seal — Polypac High‑Performance Sealing Solutions

Spring Energized Seal — Precision Sealing for Extreme Conditions

Overview

Spring Energized Seal by Polypac combines a resilient energizing spring with engineered sealing materials (PTFE variants and high-performance elastomers) to maintain consistent contact pressure and low leakage across wide temperature and pressure ranges. The Spring Energized Seal design is ideal for applications requiring long service life, low friction, and chemical resistance.

Material Technology

Polypac leverages decades of experience in filled PTFE (bronze, carbon, graphite, MoS₂, glass) and advanced elastomers (NBR, FKM, silicone, EPDM, FFKM) to tailor Spring Energized Seal constructions. Our material selection optimizes wear, swell, and creep resistance for each application, ensuring the spring and sealing element operate in harmony under dynamic and static conditions.

Performance & Applications

Spring Energized Seals perform reliably in hydraulic cylinders, valves, rotary shafts, downhole tools, and cryogenic or high-temperature systems. They excel where pressure differentials, vibration, or media incompatibility challenge standard seals. Expect reduced maintenance, extended MTBF, and improved system efficiency when replacing conventional seals with Polypac Spring Energized solutions.

Manufacturing & Quality

Polypac's custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading testing equipment. Founded in 2008 with PTFE specialization, we maintain strict QC, traceability, and collaborate with universities and research institutions to validate Spring Energized Seal performance to international standards.

Customization & Support

We provide engineered sealing solutions—custom sizes, spring configurations, and compound formulations—to meet unique working conditions. Polypac offers prototyping, FEA-assisted design, and sample testing so your Spring Energized Seal integrates seamlessly into existing systems.

Why Choose Polypac

As a scientific and technical hydraulic seal manufacturer, Polypac blends material science with precision manufacturing and global partnerships. Choose our Spring Energized Seal for proven durability, expert engineering support, and scalable production backed by rigorous testing and on-time delivery.

Spring Energized 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.

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.

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.

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.

Table of Contents

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Spring Energized Seal — Precision Sealing for Extreme Conditions
Overview
Material Technology
Performance & Applications
Manufacturing & Quality
Customization & Support
Why Choose Polypac
Spring Energized Seal Display

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