High performance directional v alve, ISO size 05
Solenoid controlled, 2-stage
Series WEVDE ...
Reference: 400--P--185110--EN--Aa/09.15
1/4 430.20.60.90
Replaces: W--30.40A
Classification:
S 315 bar, 160 l/min
S High switching reliability thanks to
2--stage follower spool operation
S Unaffected by:
-- asymmetric flow paths
-- long periods under high pressure
without switching
-- large pressure drops across the
spool lands
-- low supply voltage
S High flow rates
S Good ∆p -- Q characteristics
S Pressure in P, A and B to 315 bar
S Wet armature design, change coils
without opening hydraulic envelope
S With manual override
S Mounting interface to ISO 4401 /
CETOP R35H size 5, NFPA D05,
DIN 24 340 A10
1. Description
Series WEVDE ... -- 10 high performance
spool valves are internally piloted and
use the follower spool principle. The
main valve components are a cast
body, a spring-- centered follower spool
assembly and wet ar mature s olenoids
with pressure--tight core tube and
slip-- on coil. These v alves provide reli-
able service even under the severest
operating conditions such as very high
flow rates, high operating pressures,
supply voltage drops, long periods
without switching, large and sudden
changes in fluid temperature etc. The
highly effective spool actuation method
combines the advantages of direct act-
ing and two--stage solenoid valves,
without incurring the well known disad-
vantages of either type. The main spool
is offset by both the solenoid force and
the P ⇒ T *) pressure difference inside
the valve. The greater the P ⇒ Tpres-
sure difference, the greater the offset-
ting force. The spool is returned to the
mid--position in the same way, usingthe
P ⇒ T pressure difference and without
the need for the usual heavy centering
springs. If very low flow rates, or an
open circuit condition, result in there
being no P ⇒ T pressure difference,
then the spool actuaction reverts to the
normal solenoid / centering spring ar-
rangement.
*) The pressure in P must always be
equal to, or greater than, that in T and
the valve must be connected in the
conventional manner i.e. pressure to P,
Ttotank.
2. Symbols
1
WEVDE--42--A--10 WEVDE--42--AD--10
WEVDE--42--AG--10
WEVDE--42--BD--10
WEVDE--42--BG--10
WEVDE--43--D--10
WEVDE--43--G--10
A
B
PT
a
AB
PT
b
A
B
PT
a
A
B
PT
b
AB
PT
ba
WEVDE--42--B--10
A
B
PT
a
AB
PT
b
A
B
PT
ba
WEVDE--42--AH--10 WEVDE--42--BH--10 WEVDE--43--H--10
AB
PT
a
AB
PT
b
AB
PT
ba
WEVDE--42--AJ--10 WEVDE--42--BJ--10 WEVDE--43--J--10
AB
PT
a
AB
PT
b
A
B
PT
ba
2
3
4
8
7
9
10 16 22
14
15
20
21
13 19
4/2 FUNCTIONS
4/2 FUNCTIONS
WITH 4/3 SPOOLS
4/2 FUNCTIONS
WITH 4/3 SPOOLS
4/3 FUNCTIONS
Crossover transients
400--P--185110--EN--Aa/09.15
2/ 4
3. Characteristics
Type 4/2 and 4/3 solenoid controlled spool valves
Design combined direct acting and 2-- stage
Mounting method manifold mounting
Size nominal size 10 mm, ISO 4401 size 5 interface
Mass kg 4,8 (1 solenoid)
6,3 (2 solenoids)
Mounting attitude horizontal recommended
(vertical mounting makes air bleeding difficult)
Flow direction see symbols
Operating pressure in P, A und B bar max. 315
Operating pressure in T (tank line) bar max. 160
Flow rate Qmax l/min 160
Fluids Hydraulic oils HL and HLP to DIN 51 524
Fluid temperature range _C --25 ... + 80
Ambient temperature _C --25 ... + 50
Viscosity range cSt 10 ... 500, recommended 15 ... 250
Minimum fluid cleanless 18/14 to ISO 4406 /CETOP RP70H 8 ... 9 to NAS 1638
Magnet type pressure--tight wet armature design (slip-- on coil system)
Standard v oltages VDC 12 / 24 / 98 / 196
for other voltages -- contact BUCHER
Nom. voltage tolerance % ±10
Nom. power consumption W 39
Duty cycle %ED 100
Enclosure protection IP 65 to DIN 40 050
Electrical connection 3--pin square plug rotatable 4 x 90° to DIN 43 650 / ISO 4400
4. Performance graphs
Oil viscosity 33 cSt
20
100
10
20
40 60 80
120 140
160
30
40
50
→∆p(bar)
”Q(l/min)
4
6
5
∆p --Q characteristics
∆p --Q characteristics
→∆p(bar)
P%A
P%B
P%T
A%T
B%T
--
--
--
--
A spool
D spool
G spool
H spool
J spool
3321
1211
1312
1222
56554
Switching times
measured with: 24 VDC solenoid 5% under--
voltage, coil at steady --state temperature.
Solenoid ON
Solenoid OFF
45 ... 110 ms
20 ... 50 ms
These are guideline values only, and can be
significantly affected by flow rate and pressure.
To achieve switching times which are largely
unaffected by variations in supply voltage and
coil temperature, we recommend our type LRS
Power Reducing connector plug.
Contact BUCHER for application assistance.
→ Q(l/min)
20 100
5
10
15
20
40 60 80 120 140 160
1
2
3
400--P--185110--EN--Aa/09.15
3/ 4
5. Dimensions
Solenoid a
Solenoid a Solenoid b
ø65
215
107
97 11
Solenoid b
ø65
215
107
9711
13
approx. 113
71
36
30
10
to remove
Plug can be
turned 4x90˚
Coil can be
secured at
any angle
through
360°
ø65
107 97 107
311
21,5 54
46 12
Nameplate
Manual override
at solenoid end(s)
110
to remove
the coil
supplied complete with 4
hex. skt. cap screws M6 x 40.
Tightening torque
Ma = 8 ... 10 [ Nm ]
4/2 function, A valve
4/2 function, B valve
4/3 function
DIMENSIONS
70
the plug
ø 15,6
1,3
P
AB
TT
ISO 4401 size 5 interface
PG9
PG9
PG9
PG9
6. Schematic section
Sealkit no. DS -- 146, 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 2 O--ring ∅ 30,00 x 2,00 N70
4 2 O--ring ∅ 30,00 x 2,00 N70
Manual
override
36 A/F hex.
Tightening torque
Ma = 45 ... 55 Nm
27 A/F
Tightening torque
Ma = 45 ... 55 Nm
4
3
2
1
400--P--185110--EN--Aa/09.15
4/ 4
7. Installation and servicing
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 sym-
metrical but should always be reas-
sembled with their original orientation,
in any case. When changing seals, the
new seals should be thoroughly oiled or
greased before fitting them to the valve.
Use the correct tightening torque when
fitting Spring cap, DC and Core tube. At
installation, be sure to mount the v alve
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 mounting screws.
8. Model code key
Electrically actuated directional valve
VD
42
43
A
B
AD, AG, AH, AJ
10
(Blank)
V
1 ... 9
=
=
=
=
=
=
=
=
two--stage and direct acting
4/2 function
4/3 function
4/2 function, solenoid at A end
4/2 function with 4/3 spool, solenoid at A end
ISO 4401 size 5 interface
Viton seals
design number (omit when ordering)
WE
E43
-- --
--
10
--
_
--
1 24 V DC
4/2 function, solenoid at B end
=
BD, BG, BH, BJ
4/2 function with 4/3 spool, solenoid at B end
=
D, G, H, J
4/3 function, solenoid at both ends
=
Voltage and current plainly specified
Ex.
VD
A ... Q
Z ... R
=
=
standard model per current data sheet
special features by arrangement
For special seals, contact
=
Nitrile seals (standard)
G
BUCHER
9. Related data sheets
Old no. New no.
i--00 400--P -- 010101-- E Table of interface equivalents
i--41 400--P -- 050101-- E DIN 24 340 size A10 interface
P--20 400--P --515101 --E LRS Power Reducing DIN plug
W-- 01 400--P -- 102100-- E High Performance Spool Valves (Principle/Overview)
E 2015 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.
