4/2 and 4/3 Solenoid Directional Valve, ISO Size 03
Q
max
= 60l/min,p
max
= 315bar
Two-stage design, with EX-safty solenoid coil
Series EEXD-WEV…
1/6
Reference: 400-P-190210-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 4401-03-02
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-WEV...-6 high performance spool valves are
two-stage units which use the follower spool principle. The
main valve components are a steel body, a spring-centered
follower spool assembly 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/EN60079-1) is not supplied with the valve and, if re
quired, must be ordered as a separate item: Cable entry
gland type AGRO 1820. 16.26 M20 x 1,5 (for cable
ø11...13). The valves provide reliable service even under
the severest operating conditions such as high flow rates,
high operating pressures, long periods without switching
and large temperature fluctuations. The highly effective
spool actuation method combines the advantages of both
direct acting and two-stage solenoid valves, without incur
ring the well known disadvantages 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 - T
pressure difference, the greater the offsetting force. It is
brought back to its deenergised position in the same way,
using the P - T pressure difference and without the need for
heavy centering springs.
*) The pressure in P must exceed that in T and the valve
must be connected in the conventional manner i.e. press-
sure to P, T to tank.
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, two-stage
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
400-P-190210-EN-02/12.2020
Series EEXD-WEV…
2/6
Description, value, unitGeneral characteristics
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
Hydraulic characteristics Description, value, unit
Maximum operating pressure port A, B and P
port T
315bar
15 bar
Maximum flow rate 60 l/min
Flow direction see symbols
Hydraulic fluid HL and HLP mineral oil to DIN 51 524;
for other fluids, please contact BUCHER
Ambient temperature range -25°C … +80°C
Hydraulic fluid temperature range
1)
-25°C … +80°C
2)
Viscosity range 10…500mm
2
/s (cSt), recommended 15...250mm
2
/s (cSt)
Minimum fluid cleanliness
Cleanliness class to ISO 4406:1999
class 20/18/15
Electrical characteristics Description, value, unit
Supply voltage 24V DC/AC, 120 V DC/AC, 230 V DC/AC
alternating voltage 40 … 65 Hz ±2%
direct or undulating voltage
Supply voltage tolerance -15 % / +10 %
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 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 (deenergising)
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 IP65 / 67
(with properly fitted cable gland and properly made cable connection)
Electrical connection shipped without cable 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
400-P-190210-EN-02/12.2020
Series EEXD-WEV…
3/6
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.
IMPORTANT!:
3)
At ambienttemperatures ≥ 50 °C, the tempera
ture at the cable entry increases by 20 °C.
3 Symbol
4/2 functions 4/2 functions
with A-solenoid
4/2 functions
with B-solenoid
4/3 functions
EEXD−WEV−42−A−6... EEXD−WEV−42−AD−6... EEXD−WEV−42−BD−6... EEXD−WEV−43−D−6...
400-P-190210-EN-02/12.2020
Series EEXD-WEV…
4/6
4 Performance graphs
measured with oil viscosity 33mm
2
/s (cSt), coil at steady-state temperature and 5 % undervoltage
Δp = f (Q) Pressure drop - Flow rate characteristic
A / B, D, G and H spool
0
Q [l/min]604530150
10
20
30
40
p [bar]
P0454.ai
3
1
2
4
5
Δp = f (Q) Pressure drop - Flow rate characteristic
J spool
0
Q [l/min]604530150
10
20
30
70
p [bar]
P0455.ai
6
7
8
40
9
60
50
IMPORTANT!
The quored max. flow rates apply when symmetri
cal flows pass through the valve.
IMPORTANT!
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 2 5 2 5 -- --
D 3 5 3 5 -- --
G 3 4 3 4 -- --
H 1 4 1 4 -- 2
J 7 9 7 8 6 --
Q
ST
= Pilot-oil consumption
P0456.ai
0
60
120
180
240
300
360
250 300200150100500
p
1
[bar]
Q
L
[cm
3
/min]
A
B
H
D
Spooltype: A / B, H, D
Q
ST
= Pilot-oil consumption
P0457.ai
0
50
100
150
200
250
300240180120600
p
1
[bar]
Q
ST
[cm
3
/min]
J
G
Spooltype J + G
400-P-190210-EN-02/12.2020
Series EEXD-WEV…
5/6
5 Installation information
COMMISSIONING
S For short-circuit protection, each solenoid must be pre
ceded by a fuse conforming to IEC 60127 with a maxi
mum rating of three times the rated current of 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).
6 Dimensions & sectional view
Ğ12.6
1.3
23
206
27.165.4113.5
Ğ25
M5
4)
38
47.3
7
11.4
40.5
7.5
12 50
292.4
Ğ70
119.8
91
2
41
5)
T
A
B
P
6)
4
M = 5.2 [Nm] 10 %
M = 18 [Nm] 10 %
M = 5.2 [Nm] 10 %
4
70
400-P-190210-EN-02/12.2020
Series EEXD-WEV…
6/6
Seal kit no. DS-083-N
7)
Item Qty. 9
)
Qty. 10
)
Description
1 4 4 O-ring no. 012 ∅ 9,25x 1,78 N90
2 1 2 O-ring no.017 ∅17,17x 1,78 N90
4 1 - Copper ring DIN7603A 6 / 10 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-083-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)
7 Ordering code
EEXD = EX-protected coil instead of standard sol. coil
(for details, see electrical characteristics)
W = directional valve
E = electrically actuated
V = two-stage
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, seat valve (omit when ordering new units)
... = voltage e.g. 24 (24 V)
U = current DC + AC
EEXD 6W GE 24-- U_V 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
