Hardy controllers along with a PLC/PAC dispense ingredients from weigh hoppers and/or feeders. They open and close
the dispensing gates or valves of weigh hoppers that are mounted on, or suspended by, one or more load points (load
cells and mounting hardware); control the rate of flow of material through feeders on load cells or sitting on
Multiple feeders can be set up in a Controller-Device configuration for automatic ratio tracking. This allows for the
simultaneous blending of multiple ingredients resulting in faster product through-put.
Typically, setpoint flow rates of Controlled ingredients are a ratio of the actual flow rate of the primary
ingredient. The flow rate of the primary ingredient can be determined by the Hardy Controller, but can also be
determined by other instruments such as a fluid flow meter.
In some instances, the setpoint flow rates of the secondary ingredients are a ratio of some other parameter in the
process, such as temperature or pressure. If the primary material rate of flow (or parameter) goes up or down the
other ingredients will follow.
To learn more about how Hardy can increase the efficiency of your blending application, visit our Case Studies today.