网页RE 23178-XE, Edition: 2020-11, Bosch Rexroth AG Function, section Directional valves of type WE are solenoid-actuated directional spool valves. They control start, stop and direction of a flow. The directional valves basically consist of housing (1), one or two solenoids (2), control spool (3), and one or two return springs (4).