4/3, 4/2 and 3/2 directional valve with wet-pin DC solenoids

4/8 Bosch Rexroth AG Hydraulics WE 6 .…H RE 23164/07.06
Function, section
Directional valves of type WE are solenoid-operated directional
spool valves. They control the start, stop and direction of a
flow.
These directional valves basically consist of housing ( ), one
or two solenoids (2), control spool (3), as well as one or two
return springs (4).
In the non-operated condition, control spool (3) is held by
return springs (4) in the central or in the initial position. Control
spool (3) is actuated via wet-pin solenoids (2).
The force provided by solenoid (2) acts via plunger (5) on
control spool (3) and shifts the latter from its rest position to
the desired final position. This enables the required direction of
flow depending on the spool symbol.
5 1 3 5
6 6
2
“a” “b”
Type 4WE 6 E7X/H…
A (P) B
4 T
4
When solenoid (2) is de-energised, control spool (3) is pushed
by return spring (4) back to its rest position.
Manual override (6) allows control spool (3) to be shifted without
energisation of the solenoid.
Note!
To ensure proper operation, see to it that the pressure
chamber of the solenoid is filled with oil!
The manual override may only be operated using a rounded-off
tool (Ø3 + mm)!
Operation only up to a tank pressure of 50 bar.
2