BOSCH REXROTH
4WE6Y6X/EG24N9XNK4
R901419620
Directional Spool Valves
Directional spool valves: WE 6.-6x/
BOSCH REXROTH
MATERIAL: R901419620
SUMMARY: Directional spool valves: WE 6.-6x/
Quantity in stock: 0
The directional valves of type WE are solenoid-actuated directional spool valves. They control the start, stop and direction of a flow.
The directional valves basically consist of the housing (1), one or two electronic solenoids (2), the control spool (3), and one or two return springs (4).
In the de-energized condition, the control spool (3) is held in the central position or in the initial position by the return springs (4) (except for version "O"). The control spool (3) is actuated by wet-pin electronic solenoids (2).
For perfect functioning, the hydraulic system must be bled properly.
The force of electronic solenoid (2) acts via the plunger (5) on the control spool (3) and pushes the latter from its rest position to the required end position. This enables the necessary direction of flow from P to A and B to T or P to B and A to T.
When the electronic solenoid (2) is de-excitated, the return spring (4) pushes the control spool (3) back to its rest position.
An optional manual override (6) allows the control spool (3) to be moved without solenoid energization.
Without spring return "O" (only possible with symbols A, C and D)
This version is a directional valve with two spool positions and two electronic solenoids without detent. The valve without spring return at the control spool (3) has no defined basic position in the de-energized condition.
Without spring return with "OF" detent (only possible with symbols A, C and D)
This version is a directional valve with two spool positions and two electronic solenoids with detent. The detents are used to lock the control spool (3) in the relevant spool position. During operation, continuous application of current to the electronic solenoid can thus be omitted which contributes to energy-efficient operation.
Notices:
Pressure peaks in the tank line to two or several valves can result in unintended movements of the control spool in the version with detent. We therefore recommend that separate return lines be provided or a check valve installed in the tank line.
Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle.
Type 4WE 6 E6X/...E..XNK4...
Throttle insert "...B"
The use of a throttle insert is required when, due to prevailing operating conditions, flows occur during the switching processes, which exceed the performance limit of the valve.
| 1) | Seal ring |
|
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
||
|
WE |
6 |
6X |
/ |
E |
G24 |
N9 |
XN |
K4 |
/ |
|
01 |
3 main ports |
3 |
|
4 main ports |
4 |
|
|
02 |
Directional valve |
WE |
|
03 |
Size 6 |
6 |
|
04 |
Symbols; for the possible version, see "Symbols/Circuit diagrams" |
|
|
05 |
Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) |
6X |
|
06 |
With spring return |
no code |
|
Without spring return |
O |
|
|
Without spring return with detent |
OF |
|
|
07 |
High-power solenoid, wet-pin, with detachable valve solenoid |
E |
|
08 |
Direct voltage 24 V |
G24 |
|
09 |
With concealed manual override |
N9 |
|
Explosion protection |
||
|
10 |
"Not igniting", for details, please refer to the "information on explosion protection" |
XN |
|
Electrical connection |
||
|
11 |
Solenoid without mating connector, see "Electrical connection" |
K4 |
|
Throttle insert |
||
|
12 |
Without throttle insert |
no code |
|
Throttle Ø 0.8 mm |
B08 |
|
|
Throttle Ø 1.0 mm |
B10 |
|
|
Throttle Ø 1.2 mm |
B12 |
|
|
Use if flow > performance limit of the valve |
||
|
Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") |
||
|
13 |
NBR seals |
no code |
|
FKM seals |
V |
|
general
|
Size |
6 | ||
|
Installation position |
any | ||
|
Ambient temperature range 1) |
°C |
-20 … +50 | |
|
Storage temperature range |
°C |
+5 … +40 | |
|
Maximum storage time |
yrs |
1 | |
|
Weight |
Valve with one solenoid |
kg |
2.3 |
|
Valve with two solenoids |
kg |
2.85 | |
|
Surface protection |
Galvanized | ||
| 1) | Maximum 40 °C when using the cable sets DS2513. |
hydraulic
|
Size |
6 | ||
|
Maximum operating pressure |
Port P |
bar |
350 |
|
Port A |
bar |
350 | |
|
Port B |
bar |
350 | |
|
Port T 1) |
bar |
210 | |
|
Maximum flow |
l/min |
80 | |
|
Flow cross-section (spool position 0) |
Symbol Q |
approx. 6 % of nominal cross-section | |
|
Symbol W |
approx. 3 % of nominal cross-section | ||
|
Hydraulic fluid |
see table "Hydraulic fluid" | ||
|
Hydraulic fluid temperature range 2) |
NBR seals |
°C |
-20 … +80 |
|
FKM seals |
°C |
-15 … +80 | |
|
Viscosity range |
mm²/s |
2.8 … 500 | |
|
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 3) |
Class 20/18/15 | ||
| 1) | With symbols A and B, port T must be used as leakage oil connection if the operating pressure exceeds the admissible tank pressure. |
| 2) | Observe the "Special application conditions for safe application" |
| 3) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
|
Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
Data sheet |
|
|
Mineral oils |
HL, HLP, HLPD |
NBR, FKM |
DIN 51524 |
90220 |
|
|
Bio-degradable |
Insoluble in water |
HETG |
FKM |
ISO 15380 |
90221 |
|
HEES |
FKM |
||||
|
Soluble in water |
HEPG |
FKM |
ISO 15380 |
||
|
Important information on hydraulic fluids: For more information and data on the use of other hydraulicfluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). Ignition temperature > 190 °C Flame-resistant - containing water: Maximum pressure differential per control edge 50 bar Pressure pre-loading at the tank port > 20 % of the pressure differential, otherwise increased cavitation Life cycle as compared to operation with mineral oil HL, HLP 50 … 100%. |
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electrical
|
Voltage type |
Direct voltage | ||
|
Available voltages |
V |
24 | |
|
Voltage tolerance (nominal voltage) |
% |
± 10 | |
|
Admissible residual ripple |
% |
< 5 | |
|
Duty cycle |
100% (S1 according to VDE 0580) | ||
|
Rated current |
mA |
950 | |
|
Switching time according to ISO 6403 1) |
ON |
ms |
25 … 45 |
|
OFF |
ms |
10 … 25 | |
|
Maximum switching frequency |
1/s |
4.2 | |
|
Maximum switch-off voltage peaks Solenoid 2) |
V |
500 | |
|
Nominal power with ambient temperature 20 °C |
W |
23 | |
|
Maximum power with 1.1 x nominal voltage and an ambient temperature of 20 °C |
W |
28.8 | |
|
Protection class according to DIN EN 60529 3) |
IP65 | ||
| 1) | The switching times were determined at a hydraulic fluid temperature of 40 °C and a viscosity of 46 mm2/s. Deviating hydraulic fluid temperatures can result in different switching times. Switching times change dependent on operating time and application conditions. |
| 2) | Suitable damping by user required |
| 3) | If a suitable mating connector and a correctly mounted electric connection are used. |
Information on explosion protection – Directive 2014/34/EU
|
Area of application |
II 3G | II 3D | ||
|
Type of protection valve |
c (EN 13463-5) | |||
|
Type of protection valve solenoid according to EN 60079-7 / EN 60079-31 |
Ex ec IIC T3 Gc | Ex tc IIIC T140°C Dc X | ||
|
Maximum surface temperature 1) |
°C |
140 | ||
|
Temperature class |
T3 | |||
|
Type examination certificate solenoid |
BVS 12 ATEX E 062 X | |||
|
Requirements on the mating connector |
Temperature rating 2) |
°C |
≥ 100 | |
|
Area of application according to directive 2014/34/EU |
II 3G | II 3D | ||
| 1) | Surface temperature > 50 °C, provide contact protection. |
| 2) | Transfer temperature at the connector of the valve solenoid 85 °C at ambient temperature 40 °C. |
Information on explosion protection – Technical rules EAC TR CU 012/2011
|
Area of application |
II 3G | II 3D | |
|
Type of protection marking of valve |
2Ex nA II T3 Gc X | Ex tc IIIC T140°C Dc X | |
|
Maximum surface temperature 1) |
°C |
140 | |
|
Temperature class |
T3 | ||
|
Certificate of conformity |
No TC RU C-DE.ГБ08.В.02161 | ||
| 1) | Surface temperature > 50 °C, provide contact protection. |
Special application conditions for safe application
Connection lines must be passed in a pull-relieved way. The valve is to be installed in a way that no impact stress > 4 J can become effective. In order to avoid dangers caused by static charge, the base and/or subplate on which the valve is to be fitted must be electrically conductive and included in the equipotential bonding. The valve must not be installed close to charge generating processes. Dust layers with a thickness of > 50 mm are inadmissible. Maximum hydraulic fluid temperature:In case of bank assembly, as long as only one solenoid is energized at a time and in case of individual assembly: +80 °C
In case of bank assembly, if more than one solenoids are energized simultaneously: +65 °C The maximum temperature of the surface of the valve jacket is 110 °C. This has to be considered when selecting the connection cable and/or contact of the connection cable with the surface of the jacket is to be prevented.
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves
|
Symbol |
Direction of flow |
|||||
|
P – A |
P – B |
A – T |
B – T |
B – A |
P – T |
|
|
A, B |
3 |
3 |
– |
– |
– |
– |
|
C46, C |
1 |
1 |
3 |
1 |
– |
– |
|
D46, D, Y |
5 |
5 |
3 |
3 |
– |
– |
|
E |
3 |
3 |
1 |
1 |
– |
– |
|
F |
1 |
3 |
1 |
1 |
– |
– |
|
T |
10 |
10 |
9 |
9 |
– |
8 |
|
H |
2 |
4 |
2 |
2 |
– |
9 |
|
J, Q |
1 |
1 |
2 |
1 |
– |
– |
|
L |
3 |
3 |
4 |
9 |
– |
– |
|
M |
2 |
4 |
3 |
3 |
– |
– |
|
P |
3 |
1 |
1 |
1 |
– |
– |
|
R |
5 |
5 |
4 |
– |
7 |
– |
|
V |
1 |
2 |
1 |
1 |
– |
– |
|
W |
1 |
1 |
2 |
2 |
– |
– |
|
U |
3 |
3 |
9 |
4 |
– |
– |
|
G |
6 |
6 |
9 |
9 |
– |
8 |
Performance limits
(measured with HLP46, ϑOil = 40 ±5 °C)
Notice:
The specified performance limits are valid for operation with two directions of flow (e.g. from P to A and simultaneous return flow from B to T).
Due to the flow forces acting within the valves, the possible performance limit may be considerably lower with only one direction of flow (e.g. from P to A while port B is blocked).
The performance limits were determined when the solenoids were at operating temperature, at 10% undervoltage and without tank preloading.
|
Symbol |
Characteristic curve |
|
A, B |
1 |
|
J, L, U |
2 |
|
V |
3 |
|
D, C, Y |
4 |
|
Q, W |
5 |
|
A/0, A/0F |
6 |
|
F, P |
7 |
|
T |
8 |
|
G |
9 |
|
H |
10 |
|
D/0F, C/0F |
11 |
|
M, D/0, C/0 |
12 |
|
E1, R, E |
13 |
| 1) |
Example: Symbol E with spool position "a" ordering code ..EA.. |
| 2) | Symbol E1-: P – A/B pre-opening, Caution in conjunction with differential cylinders due to pressure intensification. |
Notice:
Representation according to DIN ISO 1219-1.
Hydraulic interim positions are shown by dashes.
The type-examination tested valve solenoid of the valve is equipped with an electrical connection according to the following table. The electrical connection of the solenoid is polarity-independent.
Electrical connections and coil connection combinations
|
Ordering code connector |
Top view |
Circuit diagram |
Pin |
Connections, assignment |
|
|
3-pole connector (2+PE) according to DIN EN 175301-803 |
K4 |
 |
 |
1 |
Solenoid coil, polarity-independent |
|
2 |
|||||
 |
Earthing |
||||
| 1) | M3, max. tightening torque MA max = 1 Nm |
Over-current fuse and switch-off voltage peaks
|
Voltage data in the valve type code |
Nominal voltage valve solenoid |
Rated current valve solenoid |
Recommended pre-fuse characteristics medium time-lag according to DIN EN 60127-1 |
|
G24 |
24 V DC |
0.95 A DC |
1 A |
Notice:
A fuse which corresponds to the rated current according to DIN 41571 and EN / IEC 60127 has to be connected upstream of every valve solenoid (max. 3 x Irated).
The shut-off threshold of the fuse has to match the prospective short-circuit current of the supply source.
The prospective short-circuit current of the supply source may amount to a maximum of 1500 A.
This fuse may only be installed outside the potentially explosive atmosphere or must be of an explosion-proof design.
When inductivities are switched off, voltage peaks result which may cause faults in the connected control electronics.
The voltage peak must be damped by a suitable external circuitry. We recommend a circuitry with a suppressor diode with a limitation voltage of approx. 50 V.
Dimensions in mm
 |
|
Required surface quality of the valve contact surface |
|
1 |
Name plate |
|
2 |
Identical seal rings for ports A, B, P, T |
|
3 |
Plug screw for valve with one solenoid |
|
4 |
Mounting nut with double edge, wrench size 32 |
|
5 |
Plug-in connector according to EN 175301-803, design A (Cable sets, separate order, see "Accessories") |
|
6 |
Porting pattern according to ISO 4401-03-02-0-05 |
|
7 |
Name plate sticker |
|
8 |
Mating connector or cable set DS2513 for valves with connector "K4" (separate order, see "Accessories") |
|
9 |
Space required to remove the cable set |
|
10 |
Space required to remove the coil |
Valve mounting screws (separate order)
|
Size |
Quantity |
Hexagon socket head cap screws |
Material number |
|
6 |
4 |
ISO 4762 - M5 x 50 - 10.9 (Friction coefficient μtotal = 0.09 … 0.14) |
R913043758 |
|
Notice: For reasons of stability, exclusively these valve mounting screws are to be used. |
|||
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notices:
Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition. The "G...J3" versions are free from aluminum and/or magnesium and galvanized. The dimensions are nominal dimensions which are subject to tolerances.Installation conditions
(Dimensions in mm)
|
Individual assembly |
Bank assembly |
|
|
Subplate dimensions |
Minimum dimensions: |
Minimum cross-section: |
|
Thermal conductivity of the subplate (EN-GJS-500-7) |
≥ 38 W/mK |
|
|
Minimum distance between the longitudinal valve axes |
≥ 55 |
|
Notice:
With respect to the hydraulic fluid temperature, please observe the “Special conditions for safe use” in chapter "Technical data".
Mating connectors for valves with connector “K4”, without circuitry, standard, with assembled connection line (ATEX)
DS2513...ATEX
Mating connectors for valves with connector “K4”, without circuitry, standard, with assembled connection line (ATEX)
DS2513...ATEX
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair