Spring Energized Rotary Seals

Flanged Cantilever Spring Energized Seals are a special class of radial seals with an added feature to help retain the seal under rotary forces. The flange is an extension of the heel of the seal, which locates in a counterbore of the housing. At assembly, the seal flange gets pinched in the housing providing a positive mechanical lock that keeps the seal stationary. Flanged seals are an excellent choice for equipment that can be designed with end plates. In these cases, assembly of a flanged seal is simple and provides a robust design as well as a level of redundant sealing on the static side of the gland. Process machinery that require a product to be contained (mixers, augers, spool valves) are good applications of this design.

When considering a rotary service seal and additional gland length is available, an O-Ring Heel Seal provides a level of anti-rotation and redundant sealing. The addition of an O-Ring on the heel of a radial seal creates a high friction interface
at the bore to counteract rotary forces. With proper hardware design, a high level of sealing can be realized, making an O-Ring Heel Seal a good choice where gaseous or low viscosity fluids need to be sealed.

The O Ring OD Cantilever Spring Energized Seals are a high-performance sealing solution designed for rotary applications where additional gland diameter is available. This seal integrates a low-durometer O-ring on its outer diameter (OD) to create a high-friction interface with the bore, effectively resisting rotational forces and preventing seal movement within the housing. The cantilever spring energizes the seal lips, ensuring consistent sealing force across a wide range of pressures and temperatures. This configuration is particularly beneficial in applications such as vapor recovery systems and vacuum pumps, where low friction and high sealing efficiency are critical.