SES 300 Series

Helical Wound Spring Energized Seals (SES) are primarily used in static applications, slow speeds, extremely low temperatures, and infrequent dynamic conditions when friction and wear are secondary concerns. The spring design has excellent loading capabilities with minimal deflection.

The 300 Series incorporates a U‑shaped seal jacket with a high‑performance stainless steel helical wound spring that produces very high load versus lip deflection. The helical wound spring provides an evenly distributed load on each individual band of the spring. Because the gaps between the coils are very small, the spring creates a near‑continuous load around the interference of the seal, significantly reducing potential leak paths. This is why 300 Series seals are well‑suited for zero or low system pressure, vacuum, and cryogenic applications.

Seal jackets are made from high‑performance fluoroplastic compounds and engineered plastics that provide high abrasion resistance, dimensional stability, and outstanding resistance to most fluids, chemicals, and gases, as well as resistance to aging.

The 300 Series is available in three unique jacket materials to address a broad range of applications. Each seal jacket is used in combination with a high‑performance stainless steel elliptical coil spring to apply positive sealing force to the mating surface.