Linear-force motors enhance proportional valves

The use of single, double or bi-directional solenoids in proportional valves is often problematic as they effect reduced uncontrolled load movements, produce lower driving forces, use more power and features high maintenance cost. Thus, fluid technology designers are advised to use linear force motors in their direct-drive servo-proportional valves because this motor type offers numerous advantages over solenoids. These include increased frequency response, more spool-driving force and reduced power consumption.
Solenoids have been a part of direct-drive valves since electrical control systems for fluid power came into being. While solenoid-actuated valves have served fluid-power technology well, a problem with nearly [...]