Whenever application details get further away from “normal” and closer to the edges of the capability envelope it becomes increasingly more difficult to establish a reliable flow control solution. Combinations of high pressure, high differential pressure, extremes of temperature, variable and/or extremes of flow rate and the aggressive nature of the media have previously resulted in some level of compromise, especially with the level of automation.
That has now changed as PCT are able to make the impossible, possible.
There are three important contributions to making the whole solution successful.
The Coriolis sensor measures the flow and sends an electronic signal to the electro-pneumatic controller. Within the electro-pneumatic controller, the firmware translates the flow signal into a pressure output that, in turn, controls the dome-loading pressure. Custom firmware within the E-PC ensures a seamless conversion of the measured flow rate signal into a corresponding pressure set-point used to vary the over-pressure within the valve and hence the amount of flow being controlled. By varying the dome-loading, the diaphragm will flex thereby either covering or exposing the orifices to vary the flow rate to the desired level.
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