This document specifies methods for determining, under steady-state conditions, the pressure differential caused by the flow through any given path in a hydraulic fluid power valve. Requirements for test installations, procedures and presentation of results are specified.Cross References:ISO 5781ISO 6264ISO 4401ISO 5598ISO 6263ISO 9110-1ISO 9110-2ISO 10372ISO 1219-1All current amendments available at time of purchase are included with the purchase of this document.