In industrial applications, sealing performance is critical to equipment stability, safety, and operational efficiency. Standard seals often fail under extreme conditions—such as intense pressure, wide temperature fluctuations, and harsh chemical exposure. That’s where JST Spring energized seal come in. Engineered with a unique composite structure and superior materials, they deliver reliable performance even in the most challenging environments across a wide range of industries.

How JST Spring energized seal Work

JST Spring energized seal feature a smart composite design: an outer sealing jacket made of high-performance polymers such as PTFE or PEEK, combined with an internal metal spring. This setup relies on the synergy of three core components:

• A specially engineered U-shaped sealing geometry
• A customizable spring (tailored in load and shape to suit operating conditions)
• A durable, chemically resistant jacket

Together, these elements ensure exceptional leak-tight performance, reduced friction, and long-term reliability.

Material Selection for Diverse Application Needs

Selecting the right material is essential to sealing success. JST offers a variety of jacket and spring materials to meet specific operational demands.

Seal Jacket Materials:

The primary jacket materials include modified PTFE and other advanced polymers. PTFE stands out for its excellent chemical resistance and thermal stability—outperforming perfluorinated elastomers in many aggressive environments. It is compatible with most chemical fluids, solvents, hydraulic oils, and lubricants. Thanks to its minimal compression set, PTFE ensures lasting sealing performance over time.

Spring Options:

To compensate for the limited elasticity of PTFE and other polymers, JST spring-energized seals incorporate specially designed metal springs. Available in canted coil, helical spring, and cantilever spring configurations, these springs maintain consistent sealing force. Spring materials include:

• Stainless steel
• Hastelloy
• Elgiloy
• Inconel 718

This flexibility allows the seals to perform reliably in high-temperature and corrosive settings.

Wide-Ranging Performance and Application Coverage

JST Spring energized seal are engineered to perform under the most extreme conditions:

• Temperature Range: –196 °C to +300 °C
• Pressure Range: Vacuum to ultra-high pressure (70 MPa)
• Speed: Up to 20 m/s in dynamic applications

Our comprehensive product line covers all major sealing scenarios, including:

• Rod Seals
• Piston Seals
• Face Seals
• Rotary Seals
• Special Custom Solutions

With outstanding resistance to temperature, pressure, and corrosion—along with a low friction coefficient—JST Spring energized seal are the preferred choice in demanding sectors such as:

• Aerospace
• Food & Medical
• Oil & Gas
• Laser Equipment
• Industrial Automation
• Control Valves

JST’s sealing solutions have earned the trust of customers worldwide. We remain committed to delivering reliable, high-performance seals that help industries operate safer, longer, and more efficiently.