Circumferential Seals

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Stein Seal's line of precision crafted circumferential seals are perfect for low-pressure applications where minimal, controlled gas leakage, high temperatures, unlimited axial shaft movement and low wear are critical. They can be used independently or as part of a sealing system. The exceptionally lightweight carbon material and split housing capability make it easy to install, remove or repair seals in limited space areas.

Common applications include:

  • aircraft engine main shafts and accessory gearboxes
  • recirculation pumps
  • process industry
  • propulsion systems

Configurations include standard single ring, back-to-back, face-to-face, or a tandem arrangement.

Key Circumferential Seal Features:

  • Unique design increases flexibility to provide better sealing
  • Special gap segments permit the seal to adjust dimensionally for minimal leakage
  • Distinctive fabrication reduces pressure loading to maximize seal life
  • The use of compression and garter springs ensures that the segments remain in contact with mating surfaces during low delta pressure and shutdown conditions

Types of Circumferential Seals:

  • Clearance Seals
  • Liquid Seals
  • Film riding
  • Hydrostatic
  • Gas Seals
  • Hydrodynamic

General Circumferential Seal Performance Characteristics:

  • Shaft rotation speeds up to 183 meters per second (600 feet per second)
  • Temperatures ranges up to 538° C (1000° F)
  • Pressure ranges up to 586 KPa (85 psid)
  • Diameter sizes ranging from 23.495 to 1054.100 millimeters (0.925 to 41.500 inches) with no practical upper limit restriction
  • Leakage rates remain consistent over the life of the seal
  • Seal life is rated at over 20,000 hours

Contact Stein Seal to Design Your Circumferential Seals