One feature that sets it apart from regular iso tank containers is that the DFT containers, can be operated when placed in the common horizontal plane as well as the vertical plane, not unlike a silo. When standing vertically on its rear end frame, the DFT container does indeed resemble a silo if only you look at its conical bottom section.
This vertical configuration and it’s resulting small footprint is favoured on Offshore Oil Rigs where space is tight. Dual means ‘consisting of two parts.’ In practical terms what it means here is that ‘Dual’ relates to it affording Operators twice the regular common tank functionality i.e. a capacity to load under vacuum plus additionally the capacity to load & discharge through positive air pressure.
Besides the design of the DFT container, what gives it its power is the equipment it gets ‘hooked up to,’ to load and discharge. This includes heavy-duty liquid ring vacuum pumps with air capacity of 1600cfm, Liquid Ring Vacuum Pump, ATEX certified T-5, belt-driven, 27″ Hg Vacuum. As for pneumatic operation Modular 1000 cfm (150 psi) Zone ll DNV 2.7-1 Air Compressors have to be deployed.