09.2017
WK
460 110
Type WEH22
WK 460 110 09.2017
dm /min
3
- 1 -
APPLICATION
up to 35 MPa
up to 450
Directional spool valve type WEH22
electro-hydraulically operated
NS22
D
D
D
DA
A
A
AT
TT
TA
A
A
A SSSSH
H
H
HE
EE
EE
EE
ET
TT
T ---- O
O
O
OP
P
P
PE
EE
ERA
RA
RA
RAT
TT
TIIIIO
O
O
ON
N
N
N MA
MA
MA
MANUA
NUA
NUA
NUALLLL
Directional spool valves type WEH22…
WEH22…
WEH22…
WEH22… electro-
hydraulically operated are intended for change in
direction of fluid flow in a system and thus it allows
to change direction of movement of a receiver -
mostly piston rod of a cylinder or hydraulic motor as
well to use functions:
on and off. These directional
spool valves are used for subplate mounting in any
position in a hydraulic system.
DESCRIPTION OF OPERATION
Main bore and annular ports P
P
P
P, T
TT
T, A
A
A
A, B
B
B
B are made in the
housing (1) and connected to its subplate connection.
Directional valve is switched by shifting the spool (2) into
one end position. Various control functions are
dependent on the spool (2) which affects the change in
configuration of connections among ports P
P
P
P, T
TT
T, A
A
A
A, B
B
B
B in
the housing (1). The spool (2) is shifted from its neutral
position by affecting pressure of hydraulic fluid supplied
via pilot valve (4) into one chamber of caps (3). The pilot
valve (4) - type WE6
WE6
WE6
WE6… is operated by means of
solenoids (5). In case of failure, the pilot valve (4) may be
shifted manually by means of manual overrides (6). The
spool (2) is centered in neutral position by means of
springs (7) - version 4WEH22
…
/…
…
…
…
or may be
hydraulically operated by the fluid pressure from the
pilot valve (4) - version 4WEH22H
H
H
H…/… - for 3-position
directional valves the centering is possible by means of
the sleeve (8). Sealing of the directional valve to a
subplate is secured by sealing rings.
H-4WEH22E13/G24NZ4
H-4WEH22HE13/G24NZ4
T
TT
T
P
P
P
P
A
A
A
A
B
B
B
B
X
X
X
X
Y
Y
Y
Y
a
b
1
2
3
4
5
6
7
T
TT
T
P
P
P
P
A
A
A
A
B
B
B
B
X
X
X
X
Y
Y
Y
Y
L
a
b
8
The product
The product
The product
The product is complied with the regulations of
is complied with the regulations of
is complied with the regulations of
is complied with the regulations of
directive
directive
directive
directive 2014/35/UE
2014/35/UE
2014/35/UE
2014/35/UE
