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Chemical Processing plant - alumina.jpg




Alumina refinery



Alumina refinery seawater intake pumps were using gland packing to prevent leakage from the shaft of the pump, however the gland packing was wearing out too quickly resulting in seawater spraying from the pumps. It was decided to change the gland packing out for a mechanical seal.

  • RPM 1450

  • Discharge Pressure 10bar

  • Shaft size: 75mm


  • Awkward stuffing box location. Technicians have to work whilst lying on their stomachs to install the mechanical seal.

  • Competitors mechanical seal has multiple components that make it difficult to install in the working position.



Flexaseal Style 85 split cartridge seal - this world first, split cartridge mechanical seal reduces downtime for challenging and time consuming installations. The two piece seal made the job easy for the technicians to handle and reduced installation time by half.


  • The easiest installation of any split cartridge mechanical seal in the world: Simply attach two halves over the shaft and mount to the pump like any other cartridge seal.

  • Only split cartridge mechanical seal where just two pieces are handled: No handling of lapped faces as both are secured safely in cartridge halves. Faces can’t be cocked, chipped or scarred.

  • Only split cartridge mechanical seal in which the impeller can be adjusted without removing the seal: Simply reinstall setting clips, release set screws and adjust impeller position then re-tighten set screws and remove the clips.

  • The only split cartridge mechanical seal fully assembled and pressure tested at the factory: Ensuring the sealing integrity of each Style 85 before is sent to the field. This process gives your installation an even higher success rate.

  • No measurements, no shims, no special tools, no glue: Standard cartridge setting clips assures proper axial and radial alignment and makes installation even easier.

  • The technicians were extremely satisfied with the ease of installation.

  • The Flexaseal 85 Split Cartridge Seal has been in and working for approximately 12 months with no leaks or issues.

Flex A Seal Style 85 installation.jpg
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