EN 5.227.11.0/01.21
1
4/2 and 4/3 directional spool valve
solenoid-operated, direct-acting
soft-shift
4WEW 6
DESCRIPTION
HYDAC 4/2 and 4/3 directional spool
valves of the 4WEW 6 series are
directional valves which are designed to
open and close ow paths in oil-hydraulic
systems. The valve operates by an
oilimmersed solenoid. During this process,
the solenoid pushes the valve’s control
spool into the position which will obtain
the desired ow path. An orice in the
magnetic spool and special valve spools
with ne control grooves work together to
dampen the movement and a soft shifting
process.
Nominal size 6
up to 80 l/min
up to 350 bar
CONTENTS
Description 1
features 1
Model code 2
Spool types / symbols 3
Function 4
Section view 4
Technical data 4
Performance 5
DIMENSIONS 6
Electrical connections 7
Manual overrides 7
Equipment 8
FEATURES
z Direct-acting, solenoid-operated spool valve
z Interface according to DIN 24340 Form A6, ISO 4401-03
z Removable high-performance solenoid coil, no need to open the
hydraulic system during replacement
z Coil rotatable by 360°, allows exible installation
z Electrical connection in several versions available
z Soft-shift process reduces shocks in hydraulic systems
z With concealed manual override, additional versions available
EN 5.227.11.0/01.21
2
MODEL CODE
4WEW 6 E S01 – 24 D G /V
_
Type
Solenoid-operated directional valve with 4 main ports, soft-shift
Nominal size
6
Spool symbol
See page 3
Series
S01 = specied by the manufacturer
Rated voltage of the solenoid coil
1)
12 = 12 VDC
24 = 24 VDC
220 = 220 VDC
Type of voltage
D = DC voltage
Electrical connection (for details, see page 7)
1)
G = male connector, DIN EN 175301-803 A
Sealing material
/N = NBR
/V = FKM
Manual override (for details, see page 7)
Not specied = with concealed manual override (standard)
1)
Other versions on request
EN 5.227.11.0/01.21
3
SPOOL TYPES / SYMBOLS
4/2-DIRECTIONAL SPOOL VALVES
Type Basic symbol With
intermediate position
D
T
A
P
B
a
T
A
P
B
a
GA
T
A
P
B
a
T
A
P
B
a
HA
T
A
P
B
a
T
A
P
B
a
4/3-DIRECTIONAL SPOOL VALVES
Type Basic symbol With
intermediate position
E
T
A
P
B
a b
T
P
a
b
G
T
A
P
B
a b
T
A
P
B
a
b
H
TP
a b
A B
T
A
P
B
a b
Q
T
A
P
B
a b
T
A
P
B
a b
EN 5.227.11.0/01.21
4
FUNCTION
The solenoid-operated directional spool
valves of the 4WEW 10 type are used to
control nominal ow and consist of one
valve casing (1) with an associated valve
spool (2). Depending on the type, each
valve is equipped with at least two return
springs (3) and one or two pole tubes (4)
and solenoid coils (5)
The valve is hydraulically controlled
by solenoids (5) which operate the
valve spool. A solenoid is a converter
which converts electrical energy into
mechanical energy. In this process,
the energised solenoid causes the
oilimmersed magnetic spool to make a
linear stroke movement. The solenoid
uses the guide rod (6) to move the
valve spool into the desired position.
This causes the nominal ow directions
between the respective ports to be
released or closed.
An orice in the magnetic spool and ne
control grooves in the valve spool work
together to slow down the switching
process and lessen pressure drops.
This signicantly reduces shocks in the
hydraulic system.
To obtain the valves’ optimum switching
capacity, the pole tube's pressure-tight
chamber should always be vented and
lled with oil.
If the solenoid has been de-energised,
the valve spool is pushed back into
the starting position by the appropriate
return spring.
The manual override (7) enables
valve operation without energising the
solenoid.
TECHNICAL DATA
General specications
MTTF
d
: According to EN ISO 13849-1:2015
chart C1 & C2
Ambient temperature range: [°C] -20 to +50
Installation position: No restrictions
Weight: [kg] 1.5 with one solenoid;
2.0 with two solenoids
Material: Valve casing: Cast iron
Pole tube: Steel
Coil housing: Steel
Name plate: Aluminium
Surface coating: Valve casing: Phosphate plated
Hydraulic specications
Operating pressure: [bar] Port A, B, P: p
max
= 350
Port T: p
max
= 210
Nominal ow: [l/min] See performance limits on page 5
Operating uid: Hydraulic oil to DIN 51524 Part 1, 2 and 3
Temperature range of operating uid: [°C] -20 to +80
Viscosity range: [mm²/s] 10 to 400 (25 is recommended)
Permitted contamination
level of operating uid:
Class 20/18/15 according to ISO 4406
Max. switching frequency: [1/h] 7,000
Manual override: up to approx. 50 bar tank pressure
possible
Sealing material: FKM, NBR
Electrical specications
Response time: [ms] See page 5
Type of voltage: DC
Rated voltage: [V] 12 24 220
Nominal power: [W] 32.7 31 28.2
Voltage tolerance: [%] ±10
Duty cycle: [%] 100
Protection class according to DIN EN 60529: With electrical connection “G” IP65
2
1
See “Conditions and Instructions for Valves” in brochure 53.000
2
If installed correctly
SECTION VIEW
1
EN 5.227.11.0/01.21
5
PERFORMANCE
Pressure drop
measured at ν = 36 mm²/s, T = 50 °C
Δp
Flow rate Q
Switching capacity
measured at ν = 36 mm²/s, T = 50 °C
Pressure p
Flow rate Q
Performance assignment to the associated spools:
Spool Pressure drop Power
limits
P→A B→T P→B A→T
D 3 3 3 3 3
E 2 3 2 3 1
G, GA 4 4 4 4 4
H, HA 1 3 1 3 2
Q 2 3 2 3 1
The performance limits were calculated with solenoids at
operating temperature and 10% low voltage.
The specied performance limits are applicable for operation
with two nominal ow directions.
If there is only one nominal ow direction, the power limits
may be lower.
Response times
Symbol Times [ms]
ON OFF
D 180 200 to 300
E 350 200 to 300
G, GA 350 150 to 300
H, HA 400 100 to 250
Q 400 200 to 300
EN 5.227.11.0/01.21
6
DIMENSIONS
Valve version with two coils
Valve version with one coil
Interface
ISO 4401-03-02-0-05 (CETOP 4.2-4-03-350)
Coil nut
Torque 5
±0.5
Nm
Coil can be turned through 360°
Standard manual override
at pole tube
EN 5.227.11.0/01.21
7
ELECTRICAL CONNECTIONS
G
Device
connector
DIN EN
175301-803 A
33
45
50
z IP65
Other models on request
MANUAL OVERRIDES
Standard
with
concealed
manual
override
75*
3.5
Operation
with tool
* Dimensions up to valve housing
The tank pressure should not exceed 50 bar. If the tank
pressure is higher, the force required to operate the manual
override increases accordingly.
For valves with two solenoids, simultaneous operation of both
manual overrides is prohibited.
EN 5.227.11.0/01.21
8
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
Tel: 0 68 97 /509-01
Fax: 0 68 97 /509-598
E-mail: valves@hydac.com
Note
The information in this brochure relates
to the operating conditions and
applications described. For applications
not described, please contact the
relevant technical department.
Technical modications are reserved.
EQUIPMENT
Designation Part no.
Seal kits (4-part set)
9.25 x 1.78 80 Sh NBR 3492432
9.25 x 1.78 80 Sh FKM 3120269
Mounting screws (4 pcs) DIN EN ISO 4762 - M5 x 30 - 10.9 603227