Proportional spool valves
Wanduh AG Tel. +41 33 672 72 72 E-mail: sales@wanduh.com Illustrations not obligatory Data sheet no.
Postfach Fax +41 33 672 72 12 Internet: www.wanduh.com Data subject to change 1.10-06E 1/3
CH-3714 Frutigen Edition 11 02
FUNCTION
Spool stroke, aperture and volume ow in-
crease proportionally to the increase in the
electric current at the proportional solenoid.
This special design senses and compensales
load induced ow changes. Flow remains
constant with var ying pressure. The optimised
shape of the spool results in a good resolution
of owimportant for sensitive motion control.
To control the valve Wanduh proportional
ampliers are available (see register 1.13).
APPLICATION
Because of the high resolution and low hy-
steresis, these valves are particularly suitable
for demanding tasks. Applications: handling
operations, robots, actuators, radar controlled
vehicles, tool making and paper production
machines, in other words anywhere where
precise control systems are needed.
DISCRIPTION
Directly controlled spool valve, actuated
by a Wanduh proportional solenoid (VDE
standard 0580), in ve chamber design. Wet
solenoid in oil. Spools with precision machined
oil passages control the oil volume wich is
proportional to the solenoid current. Reduced
pressure drop achieved by optimised ow
channels. Precise spool t, long life. Spool
made of hardened steel, valve body made
of high quality cast iron suitable for hydraulic
valves. Flange type, threaded connection by
means of a connecting plate.
ELECTRICAL SPECIFICATIONS
Construction Proportional solenoid, wet pin push type,
pressure tight.
Standard-Nominal voltage U = 12 VDC U = 24 VDC
Limiting current I
G
= 1250 mA I
G
= 680 mA
Relative duty factor 100% DF (see data sheet 1.1-430)
Protection class IP 65 to EN 60 529
Connection / Power supply Over device plug connection
to ISO 4400 / DIN 43650 (2P+E)
Other electrical specications see data sheet 1.1-115 (PI35V)
GENERAL SPECIFICATIONS
Nominal size NG4-Mini acc. to Wanduh-standard
Designation 4/2-, 4/3- Proportional control valve
Construction Direct operated spool valve
Mounting Flange, 4 holes for socket cap
screws M5 x 40
Fastening torque M
D
= 5,5 Nm (screw quality 8.8)
Pipe connection Connection plates, Multi-station ange
subplate, Longitudinal stacking system
Mounting position any
Ambient temperature -20…+50 °C
Weight: 4/2-way m = 1,1 kg
4/3-way m = 1,4 kg
Proportional directional valve
• pressure compensated
• Q
max
= 8 l/min
• p
max
= 250 bar
HYDRAULIC SPECIFICATIONS
Fluid Mineral oil, other uid on request
Contamination ISO 4406:1999, class 18/16/13
efciency (Required ltration grade ß6…10≥75)
refer to data sheet 1.0-50/2
Viscosity range 12 mm
2
/s…320 mm
2
/s
Fluid temperature -20…+70 °C
Working pressure p
max
= 250 bar (ports P, A, B)
Tank pressure
max tank pressure in T
p
max
= 160 bar
Nominal volume Q
N
= 2 l/min Q
N
= 6 l/min
ows Q
N
= 4 l/min Q
N
= 8 l/min
Min. volume ow Q
min
= 0,020 l/min
Leakage volume ow on request
Resolution 1 mA ∗
Repeatability ≤ 1 % ∗
Hysteresis ≤ 2 % ∗
∗ by optimal dithersignal
TYPE CODE
VWS 4 - - TF - #
Control valve, proportional
Number of control ports
Description of symbols acc. to table
Nominal volume ow
2 l/min 02 6 l/min 06
4 l/min 04 8 l/min 08
Normally closed
Nominal voltage U
N
12 VDC G12
24 VDC G24
Design-Index (Subject to change)
NG4-Mini
®
Proportional spool valves
Wanduh AG Tel. +41 33 672 72 72 E-mail: sales@wanduh.com Illustrations not obligatory Data sheet no.
Postfach Fax +41 33 672 72 12 Internet: www.wanduh.com Data subject to change 1.10-06E 2/3
CH-3714 Frutigen Edition 11 02
TYPE CHARTS / DESIGNATIONS OF SYMBOLS
D41
Z41a
Z41b
Z42b
Z42a
D42
CHARACTERISTICS oil viscosity υ = 30 mm
2
/s
Q = f (l) Volume ow-signal-characteristics
Q = f (p) Volume ow-pressure-characteristics
Q
N
= 2 l/min
Q = f (p) Volume ow-pressure-characteristics
Q
N
= 8 l/min
Q = f (p) Volume ow-pressure-characteristics
Q
N
= 6 l/min
Q = f (p) Volume ow-pressure-characteristics
Q
N
= 4 l/min
2,5
2,0
1,5
1
0,5
0
0 50 100 150 200 250
p [bar]
K0288
Q [l/min]
100% l
G
75% l
G
50% l
G
5
4
3
2
1
0
0 50 100 150 200 250
p [bar]
K0289
Q [l/min]
100% l
G
75% l
G
50% l
G
6
5
4
3
2
1
0
0 50 100 150 200 250
p [bar]
K0290
Q [l/min]
100% l
G
75% l
G
50% l
G
8
6
4
2
0
0 50 100 150 200 250
p [bar]
K0291
Q [l/min]
100% l
G
75% l
G
50% l
G
0 10 20 30 40 50 60 70 80 90 100
l
[
%
]
K0292
Q [l/min]
8
6
4
2
0
Q
N
= 8 l/min
Q
N
= 6 l/min
Q
N
= 4 l/min
Q
N
= 2 l/min
Proportional spool valves
Wanduh AG Tel. +41 33 672 72 72 E-mail: sales@wanduh.com Illustrations not obligatory Data sheet no.
Postfach Fax +41 33 672 72 12 Internet: www.wanduh.com Data subject to change 1.10-06E 3/3
CH-3714 Frutigen Edition 11 02
DIMENSIONS
4/2-way valve 4/3-way valve
ACCESSORIES
Sub-plates register 2.9
Proportional-amplier register 1.13
PARTS LIST
Position Article Description
10 256.3454 Proportional solenoid PI35V-G24
256.3426 Proportional solenoid PI35V-G12
20 253.8000 Plug with integrated manual
override HB4,5
30 219.2001 Plug A (grey)
35 219.2002 Plug B (black)
40 057.4208 Cover
50 246.1161 Socket head cap screw M4 x 60 DIN 912
60 246.1111 Socket head cap screw M4 x 10 DIN 912
70 160.2052 O-ring ID 5,28 x1,78
Technical explanation see data sheet 1.0-100