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site name Bruks-Siwertell
site name Bruks-Siwertell

Ship unloader - USA

White Siwertell Ship unloader in operation

Highest unloading capacity worldwide

This order for a Siwertell cement unloader was awarded by Houston Cement Company in Texas, thanks to its extremely high cement unloading capacity for its kind


The Siwertell ship unloader is part of a cement handling terminal in Houston, Texas, USA, which includes unloading and storage in silos of 100,000t in total. With low costs for maintenance and power consumption, this heavy-duty unloader is exceptionally suitable for the terminal’s high yearly throughput. 

For dust free transfer of the cement to the jetty belt conveyor, the delivery includes a movable transfer trolley, and the equipment includes a PLC control system. 

The HMI system, named SiMon (Siwertell Monitoring System), which is a PC based, is continuously providing operating data. It also contains the complete operation and service manuals and relevant pages can easily be printed out for maintenance work.

With its environment-friendly operation and numerous reference installations, the Siwertell unloader fully met the requirements from Houston Cement, which led them to placing the order with Siwertell.

Jim Gatens, President of Houston Cement Company, says “our decision to opt for a Siwertell solution that offered a discharge capacity well in excess of the existing industry standard really came down to freight rates and demurrage rates and the fact that we wanted the terminal to have a much higher annual throughput than the existing terminal. 

We consulted with other manufacturers for information on their units and they took a similar forward-looking approach, but no other unit could match the high unloading rate that we wanted and Siwertell could offer”

For more information, please contact us

Sales Manager, Northern Africa & Europe

Bertil Andersson

+46 705895920

  • Ship unloading
  • Cement

Houston Cement Company, L.P.

Additional facts

Unloader model

ST 640-D, rail-mounted

Unloading capacity


Maximum ship size

60,000 dwt, beam 31,7

Total weight


29.725871194842, -95.216087393434

Houston, USA