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Spring-Energized Seals
Spring-energized seals are precision-engineered sealing solutions designed for high-performance applications where standard elastomer seals may fall short. These seals combine the durability of high-performance polymers with the resilience of a metal spring to deliver consistent sealing force—even under extreme conditions.
How They Work
At the core of every spring-energized seal is a metal spring housed within a polymer jacket. The spring applies a continuous radial or axial load to the seal lip, ensuring contact with the mating surface. This design allows the seal to adapt to fluctuations in pressure, temperature, and hardware tolerances, maintaining an effective seal even in challenging environments.
Key Advantages
- Consistent Sealing Performance under dynamic, static, high-pressure, and vacuum conditions.
- Excellent Chemical Compatibility with aggressive media (depending on the polymer used, such as PTFE, UHMW, or PEEK).
- Wide Temperature Range tolerance, suitable for cryogenic to high-heat applications.
- Low Friction and Wear, ideal for applications where reduced drag and extended service life are critical.
Common Applications
- Aerospace and Defense Systems
- Medical and Pharmaceutical Equipment
- Cryogenic Valves and Pumps
- Oil & Gas Exploration and Refining
- Food and Beverage Processing
- Chemical Processing Systems
Spring Types Used
Each spring type offers distinct benefits, depending on the sealing requirements:
- Garter Springs: Continuous circular springs, ideal for rotary applications requiring uniform force around a shaft.
- V Springs (Cantilever Springs): Provide excellent radial loading, used in dynamic reciprocating and rotary sealing.
- Helical Wound Springs: Compact and effective for moderate loads and pressures, commonly used in static or light dynamic sealing.
- Canted-Coil Springs: Offer flexible, multi-point contact with the seal jacket, allowing for high sealing integrity and compensating for misalignment or hardware tolerance variations.
Customization Options
- Wide selection of polymer jackets (PTFE, PEEK, UHMWPE, and others)
- Spring materials available in stainless steel, Hastelloy®, Inconel®, and more
- Jacket geometries tailored to shaft, bore, or face sealing
- FDA, USP Class VI, or other industry-specific certifications available
Spring-energized seals are a go-to choice when reliability, performance, and longevity are non-negotiable. Whether you're working in extreme environments or precision applications, these seals offer a proven, customizable solution.