Solenoid Operated Spool Valve, ISO size 05
Q
max
= 100l/min,p
max
= 315bar
Direct Acting, Soft Switching
Series WEDEU…
1/5
Reference: 300-P-185310-EN-03
Issue: 09.2024
AB
Magnet
b
Magnet a
PT
S Switching time is steplessy variable from outside
the valve
S Full adjustment range is 150 … 1500 ms
S Special opening geometry, high switching
performance
S High flow rates
S Good Dp-Q values: no narrowing of flow paths in
energised position
S Slip-on coils: coils can be changed without opening
the hydraulic envelope
S Pressures to 315 bar in P, A and B
S For subplate mounting, Interface ISO size 05 to
ISO 4401-05-04
1 Description
Series WEDEU ...-10 solenoid operated spool valves are di
rect acting units that provide smooth, shock-free accelera
tion, deceleration and reversal of hydraulic cylinders and
motors. The design incorporates low-cost ramp controls
that are entirely hydraulic in operation. The principal
components of the valve are a cast body, a control spool
with centering springs, and wet armature solenoids with
high-pressure core tubes and slip-on coils (DC only). A coil
can be replaced, or the voltage changed, without opening
the hydraulic envelope. The valve switching time is adjusted
by means of a flow-control screw that is accessible from the
outside of the valve. The effect of the throttle is to reduce the
rate of oil transfer between the two spring chambers. This,
in turn, dictates the speed at which the spool shifts. To en
sure that the spring chambers are purged of air and comple
tely filled with oil when the valve is commissioned, it must be
operated through 6 ... 12 complete cycles (spool stroked
end-to-end) with the flow control screw turned fully open.
After this has been done, the flow control needle can then
be screwed in half a turn at a time (2 mm Allen key required)
until the required switching time is attained.
Warning: the flow control must never be screwed in fully i.e.
until it ”bottoms” - this would prevent any transfer of oil and
the valve would no longer function. The system design must
ensure that air cannot be sucked back through the tank line.
To provide a reliable oil supply to the two spring chambers,
the minimum tank line back pressure should be 1 bar.
2 Symbols
WEDEU-42-A-10 WEDEU-42-AD-10
WEDEU-42-AG-10
WEDEU-42-BD-10
WEDEU-42-BG-10
WEDEU-43-D-10
WEDEU-43-G-10
AB
PT
a
AB
PT
a
AB
PT
b
AB
PT
ba
AB
PT
a
AB
PT
b
AB
PT
ba
WEDEU-42-AH-10 WEDEU-42-BH-10 WEDEU-43-H-10
AB
PT
a
AB
PT
b
AB
PT
ba
4
A
B
PT
b
WEDEU-42-B-10
Crossover transients
4/2 FUNCTIONS
4/2 FUNCTIONS
WITH 4/3 SPOOLS
4/2 FUNCTIONS
WITH 4/3 SPOOLS
4/3 FUNCTIONS
1
2
3
7
6
12
11
8
9
10
5
NOTE! Other spool types on request.
300-P-185310-EN-03/09.2024
Series WEDEU
2/5
3 Technical data
General characteristics Description, value, unit
Designation 4/2 and 4/3 solenoid operated directional spool valves
Design direct acting, soft-switching
Mounting method mainfold mounting
Size nominal size 10 mm, 4401-05-04 size 5 interface
Mass 1 solenoid = 4.8 kg
2 solenoids = 6.3 kg
Mounting attitude horizontal recommended
(vertical mounting makes air bleeding difficult)
Hydraulic characteristics Description, value, unit
Maximum operating pressure P, A and B 315 bar
Maximum return pressure 160 bar
Maximum flow rate 100l/min
Switching frequency max. 1200 cycles/h
Flow direction see symbols
Hydraulic fluid HL and HLP mineral oil to DIN 51 524;
for other fluids, please contact BUCHER
Hydraulic fluid temperature range -30 °C … +80 °C
Ambient temperature range -30°C … +50°C
Viscosity range 10…500mm
2
/s (cSt), recommended 15...250mm
2
/s (cSt)
Minimum fluid cleanliness
Cleanliness class to ISO 4406:1999
class 20/18/15
Electrical characteristics Description, value, unit
Actuator type solenoid coil
Solenoid coils type pressure-tight wet armature design (slip-on coil system)
Supply voltage 12V DC, 24 V DC, 196 V DC
(Other voltages on request)
196 V DV: DIN (can be used with rectifier for 230 AC)
Supply voltage tolerance ± 10 %
Nominal power consumption 39 W
Relative duty cycle 100%
Protection class to ISO20653 / EN60529 IP65 to DIN 40050
Electrical connection 3-pin square plug rotatable 4x90° to DIN 43650 / ISO 4400
300-P-185310-EN-03/09.2024
Series WEDEU
3/5
4 Performance graphs
measured with oil viscosity 33 mm
2
/s (cSt)
20 100
2
10
40 60 80
4
6
8
12
A- / B spools
D spool
G spool
H spool
A ⇒ T
B ⇒ T
P
⇒
T
P ⇒ A
P ⇒ B
3356
-- -- 5 6
-- -- -- --
10 30 50 70
50
100
150
350
20 40 60 80
7
6
5
4
3
2
1
250
300
200
90 100
2245
3367
1167
Solenoid
OFF
ON
--
--
--
--
3
--
t
U
23 56
41
0 VDC
D Solenoid force: = ± 15 % voltage variation
= ± 50 % switching time
D Cold / hot solenoid: = ± 20 % switching time
D Flow rate Q (l/min): = influences values 3 + 6
(lower Q = shorter t)
D Pressure diff. Δp (bar): = ± 75 % change in Δp
= ± 10 % switching time
→ Q (l/min)
→ Q (l/min)
→ Δp (bar)
→ Δp (bar)
Δp-Q characteristics
Application limits
T
he quoted maximum flow rates apply when
t
he flows passing through the valve are equal
i
n both directions (symmetrical). For non-
s
ymmetrical flows, the maximum rates are
s
ubstantially reduced, in worst cases to only
1/3 of the above values.
The values 1 and 4 are jointly controlled by the setting of the
flow control, but it is usually the case that they are not equal.
Both values normally fall in the range 150 ... 1,500 ms. The
switching times are also strongly influenced by the following
factors
:
There are a large number of factors that cannot easily be
pre-determined. This means that the flow control cannot be
factory-set and adjustment on-site is therefore essential.
This is simple in practice, thanks to the externally-accessible
flow control.
OFF
ON
Switching times
1 = total energising time
2 = time until flow paths begin to open
3 = time for solenoid to open spool fully
4 = total spring-return time
5 = time until flow paths begin to close
6 = time for spring to close spool fully
5 Installation information
ATTENTION!
All installation and servicing must be carried out
with care, and by qualified personnel only. When
servicing valves (cleaning, changing seals, etc.)
note the following:
A (and B) spools must not be reversed, or the
function P ⇒ A / B ⇒ T will become P ⇒ B / A ⇒
T (and vice versa). All other spools are symmetri
cal but should always be reassembled with their
original orientation, in any case.
IMPORTANT!: When changing seals, the new
seals should be thoroughly oiled or greased be
fore fitting them to the valve.
IMPORTANT!: Use the correct tightening torque
when fitting Spring cap, DC and Core tube.
IMPORTANT!: At installation, be sure to mount
the valve with its hydraulic ports mating with those
of the manifold block or subplate and, finally, use
the correct tightening torque for the 4 x M6 moun
ting screws.
300-P-185310-EN-03/09.2024
Series WEDEU
4/5
6 Dimensions & sectional view
ø 65
215
107
97 11
ø 65
215
107
9711
13
approx. 115
71
36
30
10
ø 65
107 97 107
311
21,5 54
46 12
110
PG 9
70
ø 15,6
1,3
P
AB
TT
PG 9
PG 9
PG 9
Plug can be
turned 4 x 90_
Coil can be
secured at
any angle
through
360_
supplied complete with
4 hex. skt. cap screws
M6 x 40. Tightening
torque
Ma = 8 ... 10 Nm
to
remove
the coil
Manual override
at solenoid end(s)
4/2 function, B valve4/2 function, A valve
to remove
the plug
Nameplate
Size 05 interface to ISO
Solenoid
a
Solenoid
b
Solenoid
a
Solenoid
b
4/3 function
7 Schematic section
Sealkit no. DS-122-V, comprising:
Itm. Qty. Description Size
1 5 O-ring no. 014 ∅ 12.42 x 1.78 N90
2 2 O-ring no. 118 ∅ 21.89 x 2.62 N90
3 1 O-ring no. 012 ∅ 9.25 x 1.78
4 2 O-ring ∅ 30.00 x 2.00 N70
5 2 O-ring ∅ 30.00 x 2.00 N70
6 1 O-ring no. 010 ∅ 6.07 x 1.78 N90
Manual
override
30 A/F hex.
Tightening torque
Ma = 45 ... 55 Nm
27 A/F
Tightening torque
Ma = 45 ... 55 Nm
4
5
6
1
3
2
300-P-185310-EN-03/09.2024
Series WEDEU
5/5
8 Ordering code
9 Related data sheets
Reference Description
400-P-050101 Size 05 interface to ISO 4401-05-04
400-P-515101 LRSA DIN plug
E 2024 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen
www.bucherhydraulics.cominfo.ch@bucherhydraulics.com
All rights reserved.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The
information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual
improvement, we reserve the right to amend the product specifications contained in this catalogue.
Classification: 430.300.300.305.305