FCD used in water and wastewater application, which is responsible for : – Controlling the valves operation based on set of parameters ( water level, outlet water flow, water turbidity percentage ,…….etc.). – Backwash process , through : – Turning the air blower and backwash pumps on/off according to the philosophy of operation. – Visualization the auto backwash operation via HMI. The FCD also designed for several mode of operation as the following : – Manual mode. – Semi- auto mode. – Automatic mode.