Description of the Valve Filters in hydraulic systems generallyprotect downstream devices while filtering particles and dust. The filterconsists of filter cartridges that have to be exchanged if contaminated. An indicator on top of the unit measures apressure difference across the filter and in case of overpressure indicatesthat a replacement should be made soon. The indicator is either a visual or a visual0electrical device that transmits a signal. If the filter cartride has to be replaced,the operator separates the cartridge from the pressure line by just togglingthe balllvalve. The filter cartridge can be replaced without interrupting theprocess.
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