FEATURES
- Electro-hydraulically operated by pilot valve NW6
- Flows up to 600l/min
- Internal or external pilot supply and drain line selectable
by internal plug setting
SPECIFICATIONS
Nominal pressure: max. 320 bar
Flow-rate:
Symbols E, H, J, EA, max. 600 l/min at 210 bar
Q, D, D/OF (500 l/min at 320 bar)
Symbol G: max. 500 l/min at 210 bar
(450 l/min at 320 bar)
Control pressure: min. 5 up to max. 210 bar
Pressure in line T: max. 140 bar
(with internal drain)
Pressure in line T: max. 210 bar
(with external drain)
Fluids: Hydraulic oil to DIN 51524 part 1 and 2
Media operating temp. range: -20°C up to max. +80°C
Ambient temperature range: -20°C up to max. +50°C
Viscosity range: 10 – 400 mm²/s is recommended
Filtration: ISO 4406 class 20/18/15
or better
Weight: 8,5 kg incl. pilot valve
Electrics
Type of voltage: DC
Vol
tage tolerance: ±10%
Nominal power: 30W (12V / 2,5A) resp. 32W (24V /1,33A)
Switch-on time: Main stage: 40 ms up to 100 ms
Main stage 40 ms up to 80 ms
(Control pressure 100bar)
Coil duty rating: 100%
Electrical connection: plug according to DIN 43650
IP rating: IP 65 nach EN 60529; DIN 40050
with correctly fitted connector
4/3-Directional control valve
electro-hydraulically operated
4WEH I 25 / 4WEH EI 25
A B
SYMBOL
E
H
J
G
EA
D
D/
OF
bis 320 bar
bis 600 l/min
FUNKTION
E 5.227.2.0 /08.10
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PERFORMANCE
Diagrams
Symbol piston position Ports
P -> A P -> B A -> T B -> T P -> T
E not operated
operated 1 1 2 3
H not operated *6
operated 2 2 1 2
J not operated 4
4
operated 1 1 1 4
G not operated 5
operated 6 6 3 4
Q not operated
operated 1 1 2 3
EA not operated
operated - 1 2 -
D/OF operated 1 1 4 3
* A-B blocked
B b
locked
A blocked
(plug M6x8)
Cross section for plug setting
Valve type Plug setting
X Y
Internal pilot supply and no plug plug
external drain
I Internal pilot supply and no plug no plug
drain
external pilot supply and plug plug
drain
EI external pilot supply and plug no plug
internal drain
4/2 directional valve
with spring offset Type 4WEH 25, 32
4/3 directional valve
spring centered Type 4WEH 25 , 32
4/2 directional valve
with spring offset Type 4WEH 25, 32
X = extern
Y =
extern
P T
a
A B
TP
x
b
y
a
P T
b
A
B
P T
a
A B
TP
x
b
y
a
P T
b
0
A B
P T
a
A B
TP
x
b
y
a
P T
b
0
A B
X = extern
Y = extern
X = extern
Y = extern
Main
sta
ge
Pilot D
Main
Valve
plus Pilot
A B
TPX
Y
b
a
A B
TPX
Y
b
a
0
A B
TPX Y
b
0
a
Main
stage
Pilot J
Main
Valve
plus Pilot
Main
stage
Pilot JA
Main
Valve
plus Pilot
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MODEL CODE
4WEH I 25 E S01 –24DG / V
Name
4/2- resp. 4/3-directional spool valve
with pilot spool valve
Pilot supply and drain
I = internal pilot supply and drain
EI = External pilot supply and internal drain
Nominal size
25 = NW 25
Symbol
Available Symbols:E, J, G, H, Q, D, EA, D-OF
Types
S01 = Standard
Nominal voltage and plug
12 = 12 Volt DC
24 = 24 Volt DC
DG: DIN plug according to EN 175301-803
DO: M12x1 plug
Seals
V = Viton (Standard)
N = NBR
Standard models Part no.
types on request
Electro-hydraulic pilot control
FUNCTI
ON
HYDAC 4/2 und 4/3 directional valves for oil hydraulic systems
are to open and close flow paths. In de-energized mode the
main piston will be retained by a spring in the initial position.
An under oil switching magnet pushes the pilot piston in its
end position whereby the main piston – hydraulically operated
– moves to his end position.
Hereby the chosen flow paths will be enabled according to the
symbol of the valve. After switching-off the solenoid the pilot
piston will be pushed back in its initial position by the spring. A
manual override allow the switching of the pilot valve without
erection of the solenoid.
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Fixing plate
Hole pattern according to
DIMENSIONS
1) Manual override
2) Space for mounting the coil
3) Space for mounting the plugs
4) DIN plug (optional)
5) Fixing plate with O-rings
5x O-Ring 29,82 x 2,62 – 90 Sh
2x O-Ring 20,24 x 2,62 – 90 Sh
Fixing screws
6x M12 x 60 DIN 912-12.9
Torque 115 +1 Nm
All dimensions in mm.
Fixing elements are not in the scope of supply.
Do not design port
L f
or standard
valves, no sealing
on valve side!
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str. 5
66280 Sulzbach / Saar
Tel.: 06897 / 509 -0
Fax: 06897 / 509 -598
Email: flutec@hydac.com
Annotation
The technical information in this
brochure are relating to the operating
conditions and applications.
At deviant applications and/or
operating conditions please contact
the technical dept.
Technical information are
subject to technical modifications.
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