STEIN BUSHING SEALS

Stein Seal provides design, testing, and manufacturing services for seals and precision components, including carbon bushing seals for high-pressure gas and liquid applications. Fixed, solid carbon, floating, solid metal, segmented, and carbon insert and metal banded bushings are available.

Stein’s bushing seals are perfect for high-pressure gas and liquid applications. Each bushing seal is custom designed to fit the application and can be combined with our other seals to create sealing systems that meet the most stringent operating requirements.

The bushing seal is a clearance seal consisting of a close-fitting stationary sleeve within which the shaft rotates. The leakage is controlled from the high-pressure side of the bushing to the low-pressure side by the restricted clearance between the shaft and the bushing bore. Bushing seals can be designed in either a fixed- or floating-sleeve configuration, depending upon the operating clearance requirements, shaft movement, and vibration. The fixed bushing seal consists of a long sleeve affixed to the machine housing and offers possibilities for a relatively inexpensive assembly. Being fixed, however, it behaves like a redundant bearing when rubbing occurs and requires large clearances. A floating bushing can move in a radial direction relative to the shaft and machine housing. The floating characteristic permits them to move relatively freely with shaft movement and deflections, providing the advantage of a closer annular clearance and avoiding severe shaft rub.