Spring-Energized Seals and Sealing Solutions

Seal Sales Drawing

To request a digital copy of our new design guide, please send an inquiry to: CDI-Global.Sales@CDIproducts.com


For nearly 40 years, our spring energized OptiSeal® components, OptiPak assemblies, and A6R composite seals have solved the toughest sealing challenges in the oilfield. A broad portfolio of NORSOK approved compounds, proprietary blends, and other advanced polymeric materials brings to market fully customizable sealing solutions designed for superior performance in critical service applications.

  • Quick delivery
  • No molds required
  • Precision CNC manufactured
  • Wide material choices
  • Varied Spring configurations

How Spring-Energized Seals Work

Our OptiSeal® components and A6R composite seals are all based around the following design principles to provide enhanced sealability within your application:

  • Materials
  • Seal geometry and lip profile
  • Energizer materials (primarily metallic and elastomeric)

The basic design of CDI's spring-energized seals (or those with elastomeric o-rings) begins with a U-shaped seal jacket made from high-performance, inert, thermoplastic materials. The energizer is installed in the interior of the seal and energizes the jacket material as system pressure and squeeze increase. 

At low system pressures, the energizer actuates the seal jacket and increases sealability. At higher system pressures, the seal is pressure-energized by the fluid media—offering a sealing combination that ensures adequate sealability through the entire pressure range in a given application.

Why Use Spring-Energized Seals?

our spring-energized OptiSeal® components, OptiPak configurations, and A6R composite seals are
designed for a range of service conditions, from dynamic conditions, to differential pressures and temperature ranges. Some additional benefits of using our spring-energized sealing options include:

  • Completely customizable components 
  • Seals, sealing elements, and configurations for broad pressure ranges
  • Effective in sealing large extrusion gaps
  • High-performance materials
  • Available for rod and piston sealing
  • Less friction in dynamic applications
  • Materials lend seal to lower permanent set
  • Lowered friction in dynamic application

From lip profile customization, to unique contours and seal geometries, our experts partner with you to design the optimal sealing solution.

Common Spring-Energized  Seal Performance Characteristics 

 Typical Operating Conditions Typical Service Environments 
  • Static Motion
  • Dynamic (rotating, oscillating, and reciprocating)
  • High and Low speeds
  • Rotary Applications
  • Hydraulic Sealing Environments
  • Presence of RGD/EGD
  • HPHT
  • Differential pressures
  • Sour service (H2S)
  • Corrosive environments
  • Broad media ranges

Jacket Material Selection for Spring-Energized Seal Design

Material selection and compatibility are primary factors that contribute to excellent sealability. When designing a spring energized seal for your application, our engineering staff chooses materials with physical attributes, performance properties, and performance characteristics specific to your applicaion. 

CDI design experts carefully assess  all aspects of the application environment, including:
  • Temperature
  • Pressure
  • Dynamic conditions
  • Seal squeeze
  • Required seal geometry

The range of materials used in our spring energized seals allow for efficient use in applications with variations in temperature, pressure, and media. The result is a sealing solution capable of performing in dynamic, hostile environments where traditional elastomeric seals fail. 


 Commonly Used Jacket Materials

Materials 

Benefits and Features

  PTFE
  • Low coefficient of friction
  • Reduced stick-slip
  • No explosive decompression
  • Excellent dielectric properties
 UHMW (PE)
  • Low coefficient of friction
  • High toughness
  • High abrasion resistance
  • Broad chemical resistance
 Elastomer
  • Great sealability
  • High toughness
  • Very flexible
  • Available in thermoset and thermoplastic
 PEEK
  • Excellent chemical and corrosion capabilities
  • Good extrusion resistance
  • Thermal stability across broad temperatures
  • Lubricated grades available
  • Wide range of mechanical properties
 Acetal
  • General-purpose plastic material
  • Very high flex or fatigue resistance
  • Low moisture absorption
  • Dimensionally stable
 Custom Blends Our specialists can work with you to develop a custom compounds specific to your application. 
Please contact us here.

To enhance the inherent properties of a given material, a range of fillers and additives can be added. Reinforcing fibers, conductive fillers, colorants, and additional blends are available. Common fillers include:glass, carbon, graphite, MoS2, bronze, stainless steel, PPS, and CaF2.

Energizer Material Selection

While spring energizers are among the most popular materials used in the energized seals we offer, elastomeric options such as custom o-rings are available upon request. 

Characteristics such as load value, corrosion resistance, and deflection range are primary factors our engineers assess when selecting a spring for a given application. 

Common  Seal Energizers

    • V-Spring

    • Canted Coil

    • Flatband Helical

    • O-Rings

Have a design in mind or need help designing the ideal sealing solution? Contact us here.