The D1FM Series of electrohydraulic proportional directional control valves are servo valves with high resolution at low command inputs. Precise control of position and force loops and machine tool feed rates can be achieved. The valve incorporates drive electronics with an integral LVDT for continuous monitoring of the spool position. A zero-lap spool is available for closed-loop applications with two different "power down" configurations.
Parker Hannifin Corp., Hydraulic Valve Div., 520 Ternes Ave., Elyria, OH 44035.