4/2 and 4/3 Solenoid Directional Valve, ISO Size 03
Q
max
= 18l/min,p
max
= 160bar
direct acting, with EX-safty solenoid coil
Series EEXD-WED…
1/6
Reference: 400-P-190410-EN-02
Issue: 12.2020
Valve:
S Slip-on coil design, coils can be changed
without opening hydraulic envelope
S With manual override
S Interface to ISO 440103-02
Solenoid coil:
S To EN 60079-0, EN 60079-1, EN 60079-31
S For equipment in Category 2
gas:
II 2 G Ex d IIC T6, T4 Gb
dust:
II 2 D Ex tb IIIC T85 °C, T130° C Db
1 Description
Series EEXD-WED...-6 spool valves are direct acting units.
The main valve components are a steel body, a spring-
centered spool and wet armature solenoids with pressure-
tight core tube and a slip-on coil which is certified for use
in explosion-hazard areas. The coil slips over the core tube
and is retained by a knurled nut. The solenoid housing is
made of cast iron with spray painted finish. The solenoid
housing is threaded M20 x 1,5 for a cable entry gland. The
cable entry gland (which also must be certified to IEC/EN
60079-1) is not supplied with the valve and, if required,
must be ordered as a separate item: Cable entry gland type
AGRO 1820. 16.26 M20 x 1,5 (for cable ø11...13). The
spool is offset by the solenoid force and brought back to its
de-energised position by return or centering springs. For
the detended model EExd-WED-42-C-6, the maximum flow
rate is limited to 10 l/min.
Ex: Solenoid conforms to the European standards
IEC/EN 60079-0, IEC/EN 60079-7, IEC/EN 60079-18
Gas:
d: Flameproof enclosures
Group IIC: For use in the potentially explosive area
T6, T4: Temperature class for gas
Gb: For use in Zone 1 (Zone 2) with foreseeable faults
Dust:
tb: protection by enclosure
Group IIIC: For use in flammable dust atmospheres
T85 °C, T130 °C: Temperature class for dust
Db: For use in Zone 21 (Zone 22) with foreseeable faults
Verification certificates:
Europe BVS 15 ATEX E135 (ATEX)
others on request
2 Technical data
General characteristics Description, value, unit
Designation 4/2 and 4/3 solenoid directional valve
Design manifold-mounting, direct acting
Mounting method 4 x ∅ 5,5 holes for M5x45 cap screws
Tightening torque 5.2 Nm ± 10 %
Size size 03 interface to ISO 4401-03-02 / DIN 24 340 A6
Weight 3.4 kg (1 solenoid)
5.4 kg (2 solenoid)
Mounting attitude horizontal recommended
(vertical mounting makes air bleeding difficult)
Ambient temperature range see hydraulic and electrical characteristics
400-P-190410-EN-02/12.2020
Series EEXD-WED…
2/6
Hydraulic characteristics Description, value, unit
Maximum operating pressure port A, B and P
port T
160bar
15 bar
Maximum flow rate 18 l/min (see modification by supply voltage
tolerance)
10 l/min for detented model
Flow direction see symbols
Hydraulic fluid HL and HLP mineral oil to DIN 51 524;
for other fluids, please contact BUCHER
Ambient temperature range
1)
-25°C … +80°C
Hydraulic fluid temperature range
1)
-25°C … +80°C
2)
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
Supply voltage 24V DC/AC, 120 V DC/AC, 230 V DC/AC
alternating voltage 40 … 65 Hz ±2%
direct or undulating voltage
Supply voltage tolerance
1)
by max. ambient temperature
1)
max. flow
- 5 % / +10 % 40 °C 18 l/min
-15 % / +10 % 40 °C 12 l/min
- 5 % / +10 % 55 °C 14 l/min
-15% / +10 % 55 °C 10 l/min
- 5 % / +10 % 90 °C 10 l/min
dedented model „C“
- 15% / +10 % 90 °C 10 l/min
Ambient temperature range
1)
operation as T4 / T130 °C
operation as T5 / T95 °C
operation as T6 / T80 °C
-50°C … +90°C
-50°C … +55°C
-50°C … +40°C
Temperatue class to EN 60079-0 T1 … T6
EX-protection marking Gas:
Dust:
II 2 G, Ex d IIC (T6, T4 Gb)
II 2 D, Ex tb IIIC (T85 °C, T130 °C Db)
Nominal power consumption 7 W at 20 °C
Switching time 90 ms (energising)
40 ms (de-energising)
Depending on pressure, flow rate and viscosity as well as dwell time under
pressure, the switching times may vary from the the stated values.
Relative duty cycle 100%
Protection class to EN 942017-2 IP65 / 67
(with properly fitted cable gland and properly made cable connection)
Electrical connection shipped without cable entry gland (M20 x 1.5) and
without cable
screwed fittings have to be tested and are certified as per EN 60079-1 and
EN 60079-31.
3)
Fuse connected in series as per IEC 60127 24 V DC/AC 800 mA
120 V DC/AC 160 mA
230 V DC/AC 80 mA
IMPORTANT!:
1)
The less favourable values from the hydraulic
and electrical characteristics determine the tem
perature range of the whole valve.
IMPORTANT!:
2)
The maximum fluid temperature must not ex
ceed the permissible ambient temperature for the
whole valve.
400-P-190410-EN-02/12.2020
Series EEXD-WED…
3/6
IMPORTANT!:
3)
At ambienttemperatures ≥ 50 °C, the tempera
ture at the cable entry increases by 20 °C.
3 Symbols / Spool types
4/2 functions 4/2 functions
with A-solenoid
4/2 functions
with B-solenoid
4/3 functions
b
AB
PT
a
AB
PT
b
AB
PT
a
AB
PT
b
a
AB
PT
AB
PT
b
AB
PT
ab
AB
PT
AB
PT
a
b
EEXD−WED−42−A−6... EEXD−WED−42−AD−6... EEXD−WED−42−BD−6... EEXD−WED−43−D−6...
400-P-190410-EN-02/12.2020
Series EEXD-WED…
4/6
4 Performance graphs
measured with oil viscosity 33mm
2
/s (cSt), coil at steady-state temperature and 5 % undervoltage
Δp = f (Q) Pressure drop - Flow rate characteristic
A / B, D, G, H and J spool
0
Q [l/min]1813.594.50
1
2
3
5
p [bar]
P0452.ai
4
3
1
2
5
6
7
8
4
9
IMPORTANT!
The quored max. flow rates apply when symmetri
cal flows pass through the valve.
For non-symmetrical flows, the max. flows are
substantially reduced, in worst cases to only 25%
of the above valves.
Spool type
Flow direction
P % A B % T P % B A % T P % T P, A + B % T
A / B 1 2 3 4 -- --
D 2 7 3 8 -- --
G 3 1 2 5 -- --
H 4 4 4 8 -- 2
J 8 9 8 9 6 --
5 Installation information
COMMISSIONING
S The solenoid coils must only be operated when they are
fitted on the associated valve. For more information on in
stallation and commissioning, please refer to the operat
ing instructions supplied with the solenoid coil.
ATTENTION!
Ratings given in the operating instructions
Pay attention to the relevant operating instruc
tions from the solenoid coil! If in doubt, the less
favourable values apply.
ATTENTION!
Only qualified personnel with mechanical skills
may carry out any maintenance work. Generally,
the only work that should ever be undertaken is to
check, and possibly replace, the seals. When
changing seals, oil or grease the new seals tho
roughly before fitting them.
ATTENTION!
Authorised persons
The tasks described here may only be carried out
by authorised personnel. Authorised personnel
are those who have electro-technical training
(EN 60204-1).
400-P-190410-EN-02/12.2020
Series EEXD-WED…
5/6
6 Dimensions & sectional view
Ø 25
65.4
205
11.4 40.5
7
1.3
M5
4)
7.5
38
47.3
26.1113.5
Ø 70
119.8
91
70
288.4
46
502312
M20X1,5
8)
5)
2
1
3
T
A
B
P
4
4
6)
M
A
= 5.2 [Nm] ±10 %
M
A
= 5.2 [Nm] ±10 %
Ø 12.6
M
A
= 18 [Nm] ±10 %
Seal kit no. DS-156-N
7)
Item Qty.
9)
Qty.
10)
Description
1 4 4 O-ring no. 012 ∅ 9,25x 1,78 N90
2 1 2 O-ring no.017 ∅17,17x 1,78 N90
3 1 - Copper ring DIN7603A 5 / 9 x 1
IMPORTANT!:
4)
Valve mounting bolts M5X45 (included in
the delivery)
5)
stack mounting spacer plate SZ-16-6
must be ordered separately.
6)
Manual overid (on each solenoid)
7)
Seal kit with Viton seals, no. DS-156-V
8)
Cable entry gland, type AGRO 1820.16.26
M20 x 1,5 must be ordered separately.
9)
4/2 valves (1 solenoid)
10)
4/3 valves + 4/2 valves detent (2 solenoids)
400-P-190410-EN-02/12.2020
Series EEXD-WED…
6/6
7 Ordering code
EEXD = EX-protected coil instead of standard sol. coil
(for details, see electrical characteristics)
W = directional valve
E = electrically actuated
D = direct acting
42 = 4-way, 2 positions
43 = 4-way, 3 positions
A = 4/2 function solenoid at a end
B = 4/2 function solenoid at b end
C = 4/2 function solenoid at both end (detented model)
AD, AG, AH oder AJ = 4/2 function with 4/3 spool, solenoid at a end
BD, BG, BH oder BJ = 4/2 function with 4/3 spool, solenoid at b end
D, G, H, J = 4/3 function
6 = ISO size 03 interface
(blank) = NBR (Nitrile) seals (standard)
V = FKM (Viton) seals
(special seals - please contact BUCHER)
1 … 9 = design number (omit when ordering new units)
... = voltage e.g. 24 (24 V)
U = current DC + AC
EEXD 6W GE 24-- U4D 43-- _--
8 Related data sheets
Reference (Old no.) Description
400-P-030501 (i-31) Size 03 interface to ISO 4401-03-02
… Operating instructions for solenoid coil VACC-S18…EX4D
E 2020 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.-.305.310.300