Bushing Seals

Stein’s bushing seals are the perfect choice for high-pressure gas and liquid applications. Each bushing seal is custom designed to fit the application and is often combined with our other seals to create sealing systems that meet the most stringent operating requirements. The bushing seal is a sleeve that forms a small clearance about a shaft where leakage is limited by flow resistance between the clearance and the bushing. Bushings can be designed in either a fixed or floating sleeve configuration depending on the operating clearance requirements, shaft movement, vibration or misalignment. For machinery such as steam turbines, segmented bushings allow easy maintenance access to the shaft.

Typical applications include aircraft engine main shaft seals, compressors, pumps, and high-speed processing equipment. Configurations include either a floating design or fixed design depending on the tolerances of the specific seal applications

Key Bushing Seal Features:

• Floating bushings move radially, but are captured axially in the housing with spring loading, to better tolerate any shaft movement
• Available in a wide variety of materials suitable to each application: alloy, steels, 300/400 series stainless steel, Inconels, Hastelloy, ceramics and carbon graphite

Types of Bushings:

• Fixed Bushing
• Solid carbon Bushing
• Float Bushing
• Solid metal Bushing
• Segmented Bushing
• Carbon insert and metal banded Bushings

General Bushing Seals Performance Characteristics:

• Shaft rotation speeds up to 152.4 meters per second (500 feet per second)
• Temperature ranges up to 300° C (500° F)
• Pressure ranges up to 20,000 KPa (3000 psi)
• Diameter sizes range up to 40 cm (18 in.)