Abstract: An apparatus for use in growing a plant crop, the apparatus comprising a structure enclosing a volume in which a crop can be maintained in a controlled environment during the growth of a crop, the structure housing two endless belts in spaced-apart parallel relationship and mounted for synchronous motion about a closed path, a trough to removably retain a nutrient solution for a crop, suspension means to enable a container holding a crop to be suspended between and move with the belts, the paths of the belts being such as to at least partially immerse the container in nutrient solution and feed a crop at least once on a complete belt circuit.

Abstract: A fluid energy reduction device especially for a flow control valve has a fluid inlet and a fluid outlet separated by a plurality of stacked plates in the form of a trim stack. Each plate of the stack has a plurality of rows of discrete, spaced columns that extend to the plate above in the stack. Fluid flowing through the trim stack is obstructed by the columns and is forced to divide into a plurality of subordinate flow paths. The rows of columns are staggered in such a way that fluid downstream of the first row of columns is incident directly on columns of the next row. The arrangement provides for the smooth pressure drop and energy reduction in the fluid without cavitation, noise or vibration.