John Crane Introduces Sealing Solution with Upstream Pumping Technology

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The Type SB2/SB2A USP seal offers extended mean time between repairs, and reduced water and power consumption.

John Crane, a company specializing in rotating equipment solutions for process industries, has announced the launch of the Type SB2/SB2A USP seal. The new product combines the dual cartridge Type SB2/SB2A seal with its upstream pumping (USP) technology.

The sealing solution expands John Crane's current USP product portfolio by offering a more robust seal, suitable for the pulp and paper and mining industries where exceptional performance is required.

Ideal for use with environmentally hazardous and abrasive fluids, as well as slurry duties with up to 40% solids by weight and a solids hardness of eight Mohs, the Type SB2/SB2A USP seal is designed for pumps and other rotary equipment.

"Adding our one-of-a-kind USP seal face technology to our Type SB2/SB2A seal is a game-changer,” Terry Lemm, Portfolio Director of Universal Sealing Solutions, said. “Customers working with harsh and abrasive slurries will now have another tool for extending mean time between repair while nearly eliminating water consumption and reducing power consumption."


The new seal offers the same benefits as other products in the USP line, including extended mean time between repair, significant water reduction, energy savings, zero emissions, and lower total cost of ownership. The Type SB2/SB2A USP seal is compatible with the recently launched GS USP standardized support system, providing customers with reduced complexity, a smaller footprint, and a lower total cost of ownership.

Two design variants are available for different equipment:

  • Type SB2-USP, designed for DIN standard dimensions
  • Type SB2A-USP, designed for ANSI standard dimensions

John Crane, a subsidiary of Smiths Group, works in the area of engineered technologies and services for process industries, offering products such as mechanical seals and systems, couplings, filtration systems, and digital diagnostics technologies. Crane operates a global network of over 200 facilities in more than 50 countries.