John Crane’s USP seal design to improve pump efficiency, sustainability
IDEAL DESIGN The non-contacting design of John Crane’s USP mechanical seals helps to reduce friction, prevent wear and extend pump life in abrasive and corrosive environments
USP SPIRAL GROOVE This technology combines spiral groove features with a dual cartridge system for enhanced durability and performance
USP TYPE SB2A The USP mechanical seal from John Crane performs even in harsh environments where conventional seals fail
Using spiral groove technology, the Upstream Pumping (USP) mechanical seals from Gauteng-based John Crane are designed to provide reliable, high-pressure seals for pump systems operating in challenging mining, minerals processing and refining applications.
The non-contacting design helps to reduce friction, prevent wear and extend pump life, making it ideal for abrasive slurries and corrosive substances, the company explains.
The John Crane Type SB2USP seal exemplifies this technology, combining spiral groove features with a dual cartridge system for enhanced durability and performance, even in harsh environments where conventional seals fail.
Other benefits associated with these seals include reduced cooling water requirements, water use and improved reliability and energy efficiency, says John Crane.
USP seals’ near-frictionless operation generates negligible heat, reducing or eliminating the need for cooling systems, making them a sustainable choice for water-conscious operators. This is in addition to being ideal for remote, water-scarce locations, with the USP seal operating with minimal barrier fluid.
Flush water use is also drastically reduced, consuming a few millilitres of water an hour, compared with conventional seals that require up to 8 ℓ/min. In addition, unlike traditional seals, which typically require repairs every two to three years, USP seals often run for five years or more, with some lasting more than a decade in demanding environments, claims John Crane.
The company says this results in longer intervals between repairs, lower maintenance costs and enhanced operational uptime.
Its low-friction design also decreases motor torque, lowering energy consumption, and supports decarbonisation goals.
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