4/2 and 4/3 Solenoid Directional Valve, ISO Size 05
Q
max
= 90l/min,p
max
= 315bar
Two-stage design, with EX-safty solenoid coil
Series EEXD-WEV…
1/6
Reference: 400-P-191210-EN-03
Issue: 06.2021
Valve:
S Slip-on coil design, coils can be changed
without opening hydraulic envelope
S With manual override
S Interface to ISO 4401-05-04
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...-10 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 sole
noids 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 fin
ish. 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 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 ef
fective spool actuation method combines the advantages
of both direct acting and two-stage solenoid valves, with
out incurring 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 grea-ter 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 ∅ 6,4 holes for M6x60 cap screws
Tightening torque 9 Nm ± 10 %
Size size 05 interface to ISO 4401-05-04 / DIN 24 340 A10
400-P-191210-EN-03/06.2021
Series EEXD-WEV…
2/6
Description, value, unitGeneral characteristics
Weight 5.1 kg (1 solenoid)
7.1 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 90 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
1)
-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 db IIC (T6, T5 or T4)
II 2 D, Ex tb IIIC (T80 °C, T95 °C or T130 °C)
Nominal power consumption 7 W at 20 °C
Relative duty cycle 100%
Switching time spool A / B, D, G
spool H
100 ms (energising)
40 ms (de-energising)
200 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.
Protection class to ISO20653 / EN60529 IP65
(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
400-P-191210-EN-03/06.2021
Series EEXD-WEV…
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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
EEX−WEV−42−A−10... EEX−WEV−42−AD−10... EEX−WEV−42−BD−10... EEX−WEV−43−D−10...
400-P-191210-EN-03/06.2021
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]907030100
2
4
8
12
p [bar]
P0458.ai
3
1
2
4
5
10
6
20 40 6050 80
Δp = f (Q) Pressure drop - Flow rate characteristic
A / B, D, G and H spool
0
Q [l/min]907030100
2
4
8
12
p [bar]
P0459.ai
7
8
10
10
6
20 40 6050 80
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 2 5 2 5 -- --
D 7 10 7 8 -- --
G 3 4 3 2 -- --
H 2 4 2 2 -- 1
Q
ST
= Pilot-oil consumption
P0460.ai
0
200
400
600
800
1000
1200
250 300200150100500
p
1
[bar]
Q
ST
[cm
3
/min]
H
D
Spooltype: H, D
Q
ST
= Pilot-oil consumption
P0461.ai
0
200
400
600
800
300240180120600
p
1
[bar]
Q
ST
[cm
3
/min]
A
B
G
Spooltype A / B + G
400-P-191210-EN-03/06.2021
Series EEXD-WEV…
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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).
6 Dimensions & sectional view
70
50
92.25
M20X1,5
303.5
12
13 54
123.25
111.75 80 24.6
M6
8 71.8
38.5
216.35
1.3
2 1
4
3
5
M = 9.5 [Nm] 10 %
M = 17 [Nm] 10 %
400-P-191210-EN-03/06.2021
Series EEXD-WEV…
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Seal kit no. DS-092-N
6)
Item Qty. 8) Qty. 9
)
Description
1 5 5 O-ring no. 014 ∅12,42x 1,78 N90
2 1 2 O-ring no.017 ∅17,17x 1,78 N90
3 2 2 O-ring no. 123 ∅ 29,82x 2,62 N90
4 1 - Copper ring DIN7603A 6 / 10 x 1
IMPORTANT!:
4)
Valve mounting bolts M6X60 (included in
the delivery)
5)
Manual overid (on each solenoid)
6)
Seal kit with Viton seals, no. DS-092-V
7)
Cable entry gland, type AGRO 1820.16.26
M20 x 1,5 must be ordered separately.
8)
4/2 valves (1 solenoid)
9)
4/3 valves (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
AD, AG, AH = 4/2 function with 4/3 spool, solenoid at a end
BD, BG, BH = 4/2 function with 4/3 spool, solenoid at b end
D, G, H = 4/3 function
10 = ISO size 05 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 10W GE 24-- U_V 43-- _--
Ex.
8 Related data sheets
Reference (Old no.) Description
400-P-050101 (i-41) Size 05 interface to ISO 4401-05-04
… Operating instructions for solenoid coil VACC-S18…EX4D
E 2021 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
