More than 30 Rotork IQ actuators have been installed on jet valves to provide critical air regulation control at the Milano San Rocco wastewater treatment plant.
The treatment plant is one of the largest examples of wastewater reuse for irrigation in the world. It processes the wastewater from over one million people, equating to an average flow of 3 m3/s.
The actuators have been installed to control the air-inlet in the oxidation tanks. The oxygen within the tanks allows the various microorganisms that process the harmful elements within the wastewater to survive, so precise control is essential. The actuators are operated by a signal from the control room to regulate the valves and keep the set air flow rate within the tanks.
The actuators have been installed with a Folomatic analogue input card and a Current Position Transmitter (CPT). The Folomatic card enables the actuator to respond to an analogue signal from the control room, while the CPT provides an analogue current output relative to its position. This data allows the operator to measure the valve’s movements.