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 EEX-WEV…
1/6
Reference: 400-P-191110-EN-04
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 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...-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-cen
tered 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 winding is vacuum encapsulated and as a result
has a high operational reliability. The coil terminal box is
threaded M20X1,5 for cable diameter from 6 … 12 mm for
a cable entry gland. Valves are supplied complete with
cable entry gland but without cable. The valves provide reli
able service even under the severest operating conditions
such as high flow rates, high operating pressures, long
periods without switching and large temperature fluctua
tions. The highly effective spool actuation method com
bines the advantages of both direct acting and two-stage
solenoid valves, without incurring the well known disadvan
tages 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 deener
gised position in the same way, using the P - T pressure dif
ference 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. presssure 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 safety
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 E 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 ∅ 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-191110-EN-04/06.2021
Series EEX-WEV…
2/6
Description, value, unitGeneral characteristics
Weight 3.9 kg (1 solenoid)
4.7 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, 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
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 IP65 / 67
(with properly fitted cable gland and properly made cable connection)
Electrical connection shipped with cable gland 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-191110-EN-04/06.2021
Series EEX-WEV…
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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-191110-EN-04/06.2021
Series EEX-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
100
95
111.75 80 24.6
319
M6
8 71.8
13
12
54
38.5 40.2
50
216.35
224.1
1.3
2
1
3
4
5
24
M = 9.5 [Nm] 10 %
M = 17 [Nm] 10 %
400-P-191110-EN-04/06.2021
Series EEX-WEV…
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Seal kit no. DS-092-N
3)
Item Qty. 4
)
Qty. 5
)
Description
1 4 4 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!:
6)
Valve mounting bolts M6X60 (included in
the delivery)
7)
Manual overid (on each solenoid)
3)
Seal kit with Viton seals, no. DS-092-V
4)
4/2 valves (1 solenoid)
5)
4/3 valves (2 solenoids)
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
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
EEX 10W GE 24-- U_V 43-- _--
Ex.
8 Related data sheets
Reference (Old no.) Description
400-P-030501 (i-31) Size 05 interface to ISO 4401-05-04
… Operating instructions for solenoid coil VACC-S18…EX4ME
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
