Function, Section - Bosch Rexroth Z4WE Serie Manual De Instrucciones

RE 23193/07.11 Z4WE

Function, section

The directional valve type Z4WE is a solenoid-operated direc-
tional spool valve. It controls the start, stop and direction of
a flow.
The directional valve basically consists of housing (1), one
or two solenoids (2), control spool (3), as well as two return
springs (4).
In the de-energized condition, control spool (3) is held in the
central position or in the initial position by the return springs (4).
The control spool (3) is actuated by wet-pin solenoids (2).
To ensure proper functioning, care must be taken that
the pressure chamber of the solenoid is filled with oil.
4 3
A
A
Type Z4WE 6 ...
① = component side
② = plate side
The force of solenoid (2) acts via plunger (5) on control
spool (3) and pushes the latter from its rest position to the re-
quired end position. This opens up the required flow direction
A② to A① and B② to B①.
After solenoid (2) was de-energized, return spring (4) pushes
control spool (3) again back to its rest position.
An optional manual override (6) allows control spool (3) to be
moved without energization of the solenoid.
Due to the design principle, internal leakage is inherent to the
valves, which may increase over the service life.
Admissible shock and vibration loads see data sheet 08012.
1 4
1
B
B
2
Hydraulics Bosch Rexroth AG
Notice!
5 2
"b"
7/16
6