Stein Seal Company

Peenya, Bangalore, Karnataka

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.

• 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.

• 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

Stein Seals extensive line of precision crafted face seals meets our customers demanding criteria for innovation, performance, versatility and reliability. Whether used independently or as part of a sealing system, our face seals are the smart choice for gas and liquid applications that require high-pressures and high shaft speeds, with moderate axial shaft movement.

Common applications include gearboxes, aircraft engine main shafts, compressors, pumps, and propulsion systems. Our face seals are fast and easy to install, maintain and replace to minimize downtime and reduce cost. Configurations include standard single ring, back-to-back, face-to-face, or a tandem arrangement.

• Efficiently manage radial shaft movements while maintaining low leakage rates
• Leakage rates remain constant over the life of the seal ensuring consistent, reliable sealing
• Pressure balanced for higher delta pressure capability and decreased heat generation for long seal life
• Designed to tolerate sudden pressure reversals, such as in chemical gas applications

• Contacting (rubbing)
• Non-contacting (film riding)
  • Hydrodynamic
  • Hydrostatic

• Shaft rotation speeds up to 152.4 meter per second (500 feet per second)
• Temperatures ranges up to 538 C (1000 F)
• Pressure ranges up to 1206 KPa (175 psid)
• Shaft diameters range from 12.7 millimeters (0.500 inches) with the maximum determined by the application requirements

Steins 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 or fixed design depending on the tolerances of the specific applications

• 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

The Stein Seal Company has developed an innovative, patented, Film Riding (Dry Gas) Circumferential (Ring) Seal (FRCS). The FRCS seal utilizes carbon rings that ride on a film of gas resulting in an infinite wear life in theory. The FRCS has no carbide components to crack or shatter since the design incorporates a hard coated ductile metal runner. The FRCS design is inherently more compact than a dry gas face seal with the carbon ring having a smaller radial profile. This feature allows the FRCS to fit in a small radial and axial envelope that reduces the complexity of a retrofit labyrinth or bushing seal without modifying the compressor case. The FRCS is easily adaptable for retrofits by combining several seal rings and multiple injections of process compatible gasses and educators to complement process purity.

The FRCS provides a simpler and less expensive sealing solution because high pressure seal rings are far less complicated and less prone to problems inherent in dry gas face seal technology. The system cost is reduced since the seal is simplified and reliability increased. For low pressure applications the seal support system can be minimized or fixed to eliminate PC and FC devices dramatically reducing cost.

With over 55 years of seal design and manufacturing for the industrial and aerospace markets Stein Seal Company has the experience to solve your sealing problems. Stein Seal provides sealing solutions to meet customer needs. To discuss a specific application or for more information please contact the Stein Seal Company directly.

The Stein Seal Company has developed API (American Petroleum Institute) 682 seals for the oil and gas industry market. Stein Seal has designed, manufactured and tested a Type A pusher seal, Arrangement 3, dual pressurized cartridge seal for this market. In an Arrangement 3 design the barrier fluid pressure is kept higher than the seal chamber pressure and is designed to handle and contain hazardous and light hydrocarbon fluids. The process-end face (inner) seal is specially balanced to handle reverse pressures while the atmospheric-end (outer) seal will contain the barrier fluids.

The Stein Seal Type A pusher seal is also available in Arrangement 1 and 2. An Arrangement 1 seal is a single contacting wet cartridge seal with a bushing. Arrangement 2 cartridge seal is the same configuration as the Arrangement 3 seal but is an un-pressurized dual seal where the barrier fluid pressure is kept lower than the seal chamber fluid pressure. The atmospheric-end (outer) seal will provide additional containment of hazardous fluids.

The Stein Seal Company seals designed for the oil and gas industry are built and qualification tested according to the rigorous API 682 standards test protocols.

With over 55 years of seal design, manufacturing and testing for the industrial and aerospace markets Stein Seal Company has the experience to solve your sealing problems. Stein Seal provides sealing solutions to meet customer needs. To discuss a specific application or for more information please contact the Stein Seal Company directly.