Parker Hannifin developed the EADPF iprotect filter, a duplex filter system designed to improve both safety and filtration performance in a wide range of industrial applications. The filter incorporates Parker’s hydraulic solenoid valve technology, making it possible to switch between filters remotely. When one filter element becomes contaminated, the in-built filter condition indicator sends a signal to the duplex valve unit, telling it to switch to the other filter with a clean element. This enables effective filtration to continue without the need for manual intervention. At the same time, a warning signal is provided to the local overall system controller, informing the operator that the contaminated filter element requires replacement.