Just seeking clarification,
Please, how different is an FCV (Flow Control Valve) from a PCV (Pressure Control Valve) on a liquid service.
I mean, an FCV regulates fluid flow rate by adjusting the flow obstacle (i.e. valve orifice). But can this be achieved without the fluid pressure being affected?
Most certainly not! Any restriction to flow, contributes to pressure loss.
So, does this make an FCV also perform the work of a PCV as well?
Also, can a PCV adjust pressure without affecting the flow rate of the fluid?
Basically, how different are these two valves? Because it seems that the controlling parameters in both valve is the same i.e, flow and pressure at the same time though nomenclature separates them (FCV, PCV).
I need expert clarification.
Thanks.