4/2 and 4/3 Solenoid Directional Valve, ISO Size 03
Q
max
= 60l/min,p
max
= 315bar
Two-stage design, with EX-safty solenoid coil
Series EEX-WEV…
1/6
Reference: 400-P-190110-EN-03
Issue: 09.2020
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 IEC/EN 60079-0, IEC/EN 60079-7, EN 60079-18
To EN 60079-31
S For equipment in Category 2
gas:
II 2 G Ex eb mb IIC T4 Gb
dust:
II 2 D Ex tb IIIC T120°C Db
1 Description
Series EEX-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 aluminium with spray painted finish. The
solenoid armature is of the oil-immersed type. The coil wind
ing is vacuum encapsulated and as a result has a high oper
ational reliability. The terminal box on the coil is provided
with a cable gland for cable diameter of 6 … 12 mm. Valves
are supplied complete with cable entry gland but without ca
ble. 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 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 center
ing 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, EN 60079-18
EN 60079-31
Gas:
e: increased security
m: encapsulation
Group II: for use in the potentially explosive area
T4: temperature class for gas
Dust:
t: protection by enclosure
Group IIIC: use in areas with combustible dust
T120 °C: temperature class for dust
Verification certificates:
Europe: BVS 16 ATEX 036 X
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-190110-EN-03/09.2020
Series EEX-WEV…
2/6
Description, value, unitGeneral characteristics
Weight 2.2 kg (1 solenoid)
3.0 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
315bar
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
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, 230 V DC/AC
alternating voltage 50 … 60 Hz ±2%
direct or undulating voltage
Supply voltage tolerance -15 % / +10 %
Ambient temperature range
1)
operation as T4 / T120 °C -20°C … +40°C
Temperatue class to IEC/EN 60079-0 T1 … T4
EX-protection marking Gas:
Dust:
II 2 G, Ex eb mb IIC T4 Gb
II 2 D, Ex tb IIIC T120°C Db
Nominal power consumption 12 W at 20 °C
Relative duty cycle 100%
Protection class to ISO20653 / EN60529 IP65
(with properly fitted cable gland and properly made cable connection)
Electrical connection shipped with cable inlet thread M20 x 1.5, without cable
Fuse connected in series as per IEC 60127 24 V DC / AC 1250 mA
230 V DC / AC 125 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-190110-EN-03/09.2020
Series EEX-WEV…
3/6
3 Symbols / Spool types
4/2 functions 4/2 functions
with A-solenoid
4/2 functions
with B-solenoid
4/3 functions
EEX−WEV−42−A−6... EEX−WEV−42−AD−6... EEX−WEV−42−BD−6... EEX−WEV−43−D−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 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.
400-P-190110-EN-03/09.2020
Series EEX-WEV…
4/6
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
Spool type: 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
Spool type J + G
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-190110-EN-03/09.2020
Series EEX-WEV…
5/6
6 Dimensions & sectional view
1.3
50
40.2232
100
215
206
27.165.4113.5
95
M5
4)
38
47.3
7
310.4
11.4
40.5
7.5
5)
2 4
1
T
A
B
P
4 4
6)
M = 5.2 [Nm] 10 %
M
= 18 [Nm] 10 %
M = 5.2 [Nm] 10 %
Ğ12.6
Ğ50
Ğ25
Seal kit no. DS-083-N
3)
Item Qty. 7
)
Qty. 8
)
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
4 1 - Copper ring DIN7603A 6 / 10 x 1
IMPORTANT!:
3)
Seal kit with Viton seals, no. DS-083-V
4)
Valve mounting bolts M5X45 (included in
the delivery)
5)
stack mounting spacer plate SZ-6-1 and if
required, longer fastening screws
must be ordered separately
6)
Manual overid (on each solenoid)
7)
4/2 valves (1 solenoid)
8)
4/3 valves (2 solenoids)
400-P-190110-EN-03/09.2020
Series EEX-WEV…
6/6
7 Ordering code
EEX = 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
EEX 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…EX4ME
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