Spring Energized Seals

Cantilever Spring Seal

Hansealing Cantilever Spring Seals utilize a V-shaped spring encased in a high-performance polymer jacket. During installation, the V-spring is compressed, generating consistent sealing energy that ensures a positive and reliable seal. Featuring a linear load curve and an exceptional deflection range, Hansealing Cantilever Spring Seals offer outstanding versatility. They are commonly used as high-performance replacements for rubber U-cups that have failed due to chemical corrosion, extreme temperatures, excessive friction, or wear.

These seals are ideally suited for reciprocating applications such as shock absorbers, hydraulic cylinders, pumps, and compressors. The unique spring design focuses sealing force at the front lip, making it highly effective as an environmental excluder or for scraping viscous media. Additionally, the spring cavity can be filled with FDA-compliant silicone for clean-in-place (CIP) applications in regulated industries.

Canted Coil Spring Seal

Hansealing Canted Coil Spring Seals feature a precisely wound wire spring enclosed within a high-performance polymer jacket. Unlike conventional spring designs, the canted coil provides a semi-linear load curve, delivering stable sealing force across a wide deflection range. This makes them ideal for friction-sensitive applications such as HPLC systems, encoders, and flap actuators, where consistent performance is essential. In battery-powered devices, these seals help minimize friction and extend battery life.

Hansealing Canted Coil Spring Seals feature a precisely wound wire spring enclosed within a high-performance polymer jacket. Unlike conventional spring designs, the canted coil provides a semi-linear load curve, delivering stable sealing force across a wide deflection range. This makes them ideal for friction-sensitive applications such as HPLC systems, encoders, and flap actuators, where consistent performance is essential. In battery-powered devices, these seals help minimize friction and extend battery life.

Helical Spring Seal

Hansealing Helical Spring Seals use a wound ribbon metal spring enclosed in a durable polymer jacket. The helical spring design delivers a high load over a limited deflection range, making it an excellent choice for applications that demand very tight sealing. Best suited for static or slow dynamic conditions, these seals are commonly applied in stem seals and cryogenic valves, where additional sealing force is needed to withstand extreme thermal effects.

Flanged Seal

Hansealing Flanged Seals are a specialized type of radial seal designed with an extended flange to resist rotary forces and ensure reliable retention. The flange, formed as an extension of the heel, fits into a housing counterbore where it is compressed during assembly. This creates a positive mechanical lock that keeps the seal stationary, enhancing both durability and sealing performance.

Flanged seals are well-suited for equipment incorporating end plates, as installation is simple and robust. They also provide an added level of redundant sealing on the static side of the gland. Typical applications include process machinery such as mixers, augers, and spool valves—where product containment and long-term reliability are essential.

O-Ring Heel Seal

Hansealing O-Ring Heel Seals are an effective choice for rotary service applications where additional gland length is available. By integrating an O-Ring at the heel of the radial seal, a high-friction interface is created at the bore, helping resist rotary forces while providing anti-rotation stability. With proper hardware design, these seals deliver a high level of performance, making them particularly suitable for sealing gaseous or low-viscosity fluids where redundant sealing and reliability are essential.

O-Ring OD Seal

Hansealing O-Ring OD Seals are designed for rotary service applications where additional gland diameter is available. By adding an O-Ring on the outside diameter of a radial seal, a high-friction interface is created at the bore to resist rotary forces and improve sealing reliability. Since the O-Ring is softer than the jacket material, it provides greater compliance and ensures a tight seal on the bore. This design is commonly applied in vapor recovery systems and vacuum pumps, where low running friction and high sealing efficiency are critical.

Cased Spring Seal

Hansealing Cased Spring Seals are engineered for extreme rotary service, offering both durability and reliable sealing. In this design, a metal case surrounds the spring seal and is press-fit into the hardware bore. The metal-to-metal fit provides a secure seal and a highly effective anti-rotation mechanism.

These seals are ideal for rotary applications such as gearboxes and power transmission systems, where performance and reliability are critical. They are also well-suited as rod end scrapers, effectively excluding aggressive media in demanding environments.

Internal Face Spring Seals

Internal Face Spring Seals are primarily used in static sealing applications. They are designed to retain pressure within vessels, making them effective for lid closures and pipe flange connections. Compared with O-Rings, PTFE-based Face Spring Seals deliver enhanced pressure capacity, chemical resistance, and temperature range. They are also well-suited for cryogenic applications, where reliable sealing is essential.

External Face Spring Seals

External Face Spring Seals are commonly applied in static sealing environments where the goal is to exclude environmental media from exposed joints, hinge points, or pipe fittings. Compared with O-Rings, PTFE-based Face Spring Seals offer superior chemical compatibility, pressure handling, and temperature performance. They are also effective in cryogenic conditions, providing reliable protection in demanding applications.