Stein Seal's line of precision crafted
circumferential sealing devices is 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 control, and 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
Unique design increases flexibility to provide better
sealing
