Circumferential Carbon Seals

Circumferential Carbon Seals

Stein Seal’s line of precision crafted circumferential carbon 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 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 Performance Characteristics:

• Shaft rotation speeds up to 183 meters per second (600 feet per second)

• Temperature 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

Explore our latest innovation – the Standardized Carbon Seals. Designed to outperform traditional seals in numerous applications, these seals are a game-changer. Interested in learning more? Check out our Standard Seal Brochure and review the data sheet today.


+1 215-256-0201


1500 Industrial Boulevard 

KulpsvillePA 19443-0316



+1 215-256-0201

Stein Seal Company
P.O. Box 316
1500 Industrial Blvd.
Kulpsville, PA 19443-0316 U.S.A.