Engineered to the application

The Stefa® High-Pressure Radial Shaft Seals range represents a step-forward for rotary sealing, offering a variety of features designed to enhance performance and longevity in demanding pressurized environments.

From initial design to serial production, Trelleborg Sealing Solutions supports you in developing a solution customized to your application, including testing and validation services to ensure a trusted and reliable product.

Features and Benefits

  • Customized and developed for the application to extend product life and maximize effectiveness.
  • Optimized for various speed and pressure combinations to improve sealing performance.
  • Protect sensitive components over a long service life by effectively retaining lubrication.
  • Lower total cost of ownership through proprietary designs and material formulations.
  • Meet specific requirements for wear, temperature and chemical compatibility with a tailored portfolio of high-quality materials.
  • Compensate for shaft misalignment and eccentricity with innovative engineered design.
  • Ensure product availability through engineering and logistics support from a global part.
Download the Product Guide
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Stefa® High-Pressure Radial Shaft Seals Webinar

Attend this webinar to:

  • Get insights into our full range of rotary sealing solutions for pressures up to 20 MPa/2,900 psi
  • Have a look at our unique capabilities to simulate and test special working conditions, customary to individual use cases (for example shaft centricity or pulsation of pressure)
  • Convince yourself of our manufacturing quality: We hold ourselves to the highest standard by following a zero-defect approach as the threshold for our quality acceptability
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HP20

A proprietary lip geometry that self-balances under strong pressure.

  • METAL RETAINER 
    Prevents lip extrusion at high pressures and dissipates heat, extending service life. 
  • ENGINEERED GEOMETRY 
    Pressure-balanced design ensures stable shaft contact, enhancing sealing and reducing friction. 

Pressure: From 5 to 20 MPa/  725 to 2,900 psi   
Speed: Up to 2.5 m/s/8.2 ft/s 
Temperature: -40 °C to +100 °C/-40 °F to +212 °F

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SPS-HP20

Effectively resists sideloads and shaft eccentricity over a long service life.

  • CUSTOMIZABLE DESIGN
    Geometry and materials engineered for each application to maximize performance.
  • FLEXIBLE LIP GEOMETRY 
    Energized by a stainless steel spring to compensate for sideloads and shaft eccentricity.

Pressure: Up to 15 MPa/2,175 psi 
Speed: Up to 5 m/s/16.4 ft/s 
Temperature: -40 °C to +100 °C/-40 °F to +212 °F

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HP20S

High quality, cost-efficient and long-lasting performance for high torque, low speed motors.

  • ENERGIZING SPRING 
    Extends seal lifespan and enhances both pressurized and unpressurized operation.
  • PADS AND CHANNELS 
    Improves lip lubrication at start-up and higher shaft speeds to reduce wear.

Pressure: Up to 15 MPa/2,175 psi 
Speed: Up to 5 m/s/16.4 ft/s 
Temperature: -40 °C to +100 °C/-40 °F to +212 °F

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SPV

Enhanced service life at high speeds with pressure spikes and changes in direction.

INNOVATIVE DESIGN 
Features are engineered and tested to deliver cutting-edge sealing performance and endurance.

FLEXIBLE MATERIALS 
Elastomer grades are customized to suit specific application needs, including premium HNBR and FKM materials.

Pressure Up to 2.5 MPa/363 psi 
Speed Up to 17 m/s/55.7 ft/s 
Temperature -40 °C to +100 °C/-40 °F to +212 °F

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TRP

A proprietary geometry that effectively combines performance and manufacturing reliability.

ADDITIONAL DUST LIP 
Enhanced protection to extend lifespan in polluted environments.

IMPROVED LIP CONTACT
Reduces friction and optimizes sealing efficiency under pressure and speed.

Pressure: Up to 0.7 MPa/102 psi
Speed: Up to 10 m/s/32.8 ft/s
Temperature: -40 °C to +100 °C/-40 °F to +212 °F