Spring-Energised Seals

A spring-energised seal is a machined polymer jacket containing a corrosion-resistant metal spring. The spring maintains contact force when fluid pressure is low or conditions change, while the jacket provides the sealing surface for rotary, reciprocating or static duties involving difficult media.

Key facts

Family: Rotary & Mechanical Seals
Common types: V-spring jacket, Helical spring jacket, Canted-coil jacket, Flanged rotary jacket, Internal-face seal
Materials: Virgin PTFE, Carbon-filled PTFE, Bronze-filled PTFE, PEEK, UHMW-PE, Stainless steel spring
Used in: Chemical metering pumps, Vacuum equipment, Cryogenic valves, Process swivels, Aerospace actuators

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Types

V-spring jacket
Helical spring jacket
Canted-coil jacket
Flanged rotary jacket
Internal-face seal

Materials

Applications

Chemical metering pumps
Vacuum equipment
Cryogenic valves
Process swivels
Aerospace actuators

What to send for a quote

shaft or bore diameter
groove section and width
motion type
fluid and temperature
pressure direction

Questions about spring-energised seals

What should I send to identify spring-energised seals?

Send shaft or bore diameter, groove section and width, motion type, fluid and temperature, pressure direction. Show whether the open spring cavity faces pressure and note any anti-rotation or flange feature on the jacket. A clear photograph, drawing or readable reference can resolve details that dimensions alone do not show.

How should I select spring-energised seals?

Match spring form and jacket compound to motion, media, friction, wear, temperature cycling and groove installation method. Confirm the mating parts and operating environment before ordering, since an apparently similar size can use a different profile, material or internal arrangement.

Last updated: 2026-10-08