DIRECTIONAL SPOOL VALVES, DIRECT OPERATED, WITH SOLENOID ACTUATION
WE…6/.B…VP1
Material #: R901458409
Model : 4WE 6 J5X/BG24NVP1Z2
4/3-, 4/2- or 3/2-way version For intended use in potentially explosive atmosphere Porting pattern according to ISO 4401-03-02-0-05 Wet-pin AC or DC solenoids Electrical connection with individual connection or piping connection (NPT 1/2") With manual override
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4/3-, 4/2- or 3/2-way version For intended use in potentially explosive atmosphere Porting pattern according to ISO 4401-03-02-0-05 Wet-pin AC or DC solenoids Electrical connection with individual connection or piping connection (NPT 1/2") With manual override
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 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 impulse spools). The control spool (3) is actuated by wet-pin solenoids in hydraulic fluid (2).
To ensure proper functioning, make sure that the pressure chamber of the solenoid is filled with hydraulic fluid.
The force of the 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 → A and B → T or P → B and A → T.
After de-excitation of the solenoid (2), the return spring (4) pushes the control spool (3) back to its rest position.
A manual override (6) allows control spool (3) to be moved without solenoid energization.
Without spring return “O” (only possible with symbol D)
This version is a directional valve with two spool positions and two solenoids without detent. In the de-energized condition, there is no defined spool position.
Without spring return, with detent “OF" (Impulse spool, only possible with symbol D)
This version is a directional valve with two spool positions, two solenoids and one detent.
It alternately locks the two spool positions and the solenoid therefore does not need to be permanently energized.
Notice:
For design reasons, internal leakage, which may increase over the life cycle, is inherent to the valves.
Type 4WE 6 E5X/.B..NVP1Z2
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.
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01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
12 |
13 |
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WE |
6 |
5X |
/ |
B |
N |
VP1 |
Z2 |
/ |
|
01 |
3 main ports |
3 |
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4 main ports |
4 |
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|
02 |
Directional valve |
WE |
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03 |
Size 6 |
6 |
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04 |
Symbols e.g. E, G, J, D, Y, etc.; possible design see Circuit diagrams |
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05 |
Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions) |
5X |
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06 |
With spring return |
no code |
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Without spring return |
O |
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Without spring return with detent |
OF |
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07 |
High-power solenoid (wet-pin) |
B |
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Voltage |
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08 |
Direct voltage 24 V |
G24 |
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Alternating voltage 120 V |
W120R |
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09 |
With manual override |
N |
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Explosion protection |
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10 |
NEC500, NEC502, CEC Anex J and CEC Section 18 |
VP1 |
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For details, see information on explosion protection in Technical data |
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Electrical connection |
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11 |
Individual connection |
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Solenoid with terminal box and cable gland |
Z2 |
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For details of electrical connections, see Electrical connection |
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12 |
Without throttle insert |
no code |
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Throttle Ø 0.8 mm |
B08 |
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Throttle Ø 1.0 mm |
B10 |
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Throttle Ø 1.2 mm |
B12 |
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Use with flows which exceed the performance limit of the valve (see Product description) |
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Seal material |
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13 |
NBR seals |
no code |
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FKM seals |
V |
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Observe compatibility of seals with hydraulic fluid used. |
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Notice:
The manual override cannot be allocated a safety function and may only be used up to a tank pressure of 50 bar.
For applications outside these parameters, please consult us!
general
|
Weight |
With 1 solenoid |
kg |
3.5 |
|
With 2 solenoids |
kg |
5.8 | |
|
Installation position |
Any | ||
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Ambient temperature range |
°C |
-20 … +60 | |
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Storage temperature range |
°C |
+5 … +40 | |
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MTTFD values according to EN ISO 13849 1) |
Years |
150 | |
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Surface protection |
Valve body |
Galvanized | |
|
Solenoid |
Galvanized | ||
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Maximum storage time |
yrs |
1 | |
| 1) | For further details, see data sheet 08012 |
hydraulic
|
Maximum operating pressure |
Port P |
bar |
350 |
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Port A |
bar |
350 | |
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Port B |
bar |
350 | |
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Port T 1) |
bar |
210 | |
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Maximum flow |
l/min |
70 | |
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Hydraulic fluid |
see table below | ||
|
Hydraulic fluid temperature range |
NBR seals |
°C |
-20 … +70 |
|
FKM seals |
°C |
-15 … +70 | |
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Viscosity range |
mm²/s |
2.8 … 500 | |
|
Maximum admissible degree of contamination of the hydraulic fluid 2) |
Class 20/18/15 according to ISO 4406 (c) | ||
|
Maximum surface temperature |
see Information on explosion protection | ||
| 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) | 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. |
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Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
Data sheet |
|
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Mineral oil |
HL, HLP, HLPD |
NBR, FKM |
DIN 51524 |
90220 |
|
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Bio-degradable |
Insoluble in water |
HETG |
FKM |
ISO 15380 |
90221 |
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HEES |
FKM |
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Soluble in water |
HEPG |
FKM |
ISO 15380 |
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Flame-resistant |
Water-free |
HFDU, HFDR |
FKM |
ISO 12922 |
90222 |
|
Containing water |
HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) 1) |
NBR |
ISO 12922 |
90223 |
|
| 1) | Maximum ambient temperature for individual operation 50 °C and 50 % duty cycle, for manifold operation 40 °C and 50 % duty cycle. |
Important notice on hydraulic fluids:
For more information and data on the use of other hydraulic fluids, 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 > 180 °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 erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100% Bio-degradable and flame-resistant: If these hydraulic fluids are used, small amounts of dissolved zinc may get into the hydraulic system (700 mg zinc per pole tube).
electrical
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Voltage type |
Direct voltage | AC voltage 50/60 Hz | ||
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Available voltages |
V |
24 | 120 | |
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Voltage tolerance (nominal voltage) |
% |
± 10 | ||
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Admissible residual ripple |
% |
< 5 | ||
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Duty cycle/operating mode according to VDE 0580 |
S1 (continuous operation) | |||
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Switching time according to ISO 6403 1) |
ON |
ms |
20 … 70 | 35 … 90 |
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OFF |
ms |
15 … 30 | 30 … 80 | |
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Maximum switching frequency |
1/h |
3600 | ||
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Nominal power with ambient temperature 20 °C |
W |
20 | ||
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Maximum power with 1.1 x nominal voltage and an ambient temperature of 20 °C |
W |
20.6 | ||
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Protection class according to |
NEMA 250 |
NEMA type 4X (with correctly installed electrical connection) | ||
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DIN EN 60529 |
IP 65 (with correctly installed electrical connection) | |||
| 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. |
Information on explosion protection
|
Area of application according to |
NEC500 and CEC Annex J |
Class I, Division 1, Groups B, C, D T4 |
|
NEC502 and CEC Section 18 |
Class II/III, Division 1, Groups E, F, G T4 | |
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Maximum surface temperature 1) |
°C |
130 |
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Temperature class |
T4 | |
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Type of protection valve solenoid |
XP (explosion-proof); DIP (dust ignition protection) | |
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FM certificate |
US |
3055770 |
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Canada |
3055770C | |
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Ambient temperature range |
°C |
-20 … +60 |
| 1) | Surface temperature > 50 °C, provide contact protection. |
Special application conditions for safe application
The connection line requires a minimum temperature rating of 105 °C. When selecting the connection line, please observe the requirements regarding the temperature rating and avoid contact of the connection line with the solenoid surface. In case of valves with two solenoids, maximally one of the solenoids may be energized at a time. In case of bank assembly, the maximum ambient temperature may not exceed 50 °C. Ensure unobstructed heat dissipation at the solenoid. The solenoid may not be covered or exposed to direct sunlight. For use of the valve in the intended explosion protection atmosphere, a conduit seal has to be installed in the pipeline within 450 mm (downstream of the valve solenoid).(measured with HLP46, ϑOil = 40 °C ±5 °C)
Δp-qV characteristic curves
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Symbol |
Direction of flow |
|||||
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P – A |
P – B |
A – T |
B – T |
B – A |
P – T |
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|
D, Y |
5 |
5 |
3 |
3 |
– |
– |
|
E |
3 |
3 |
1 |
1 |
– |
– |
|
J |
1 |
1 |
2 |
1 |
– |
– |
|
G |
6 |
6 |
9 |
9 |
– |
8 |
|
C |
3 |
3 |
5 |
3 |
– |
– |
|
H |
2 |
1 |
2 |
2 |
– |
– |
|
T |
8 |
8 |
4 |
4 |
– |
– |
| Other symbols upon request |
Performance limits (measured with HLP46, ϑOil = 40 °C ± 5 °C)
Notice:
The specified performance limits are valid for use with two directions of flow (e. g. from P → A and simultaneous return flow from B → T).
Due to the flow forces acting within the valves, the admissible performance limit may be considerably lower with only one direction of flow (e. g. from P → A while port B is blocked).
In such cases, please consult us.
The performance limits were determined when the solenoids were at operating temperature, at 10 % undervoltage and without tank preloading.
Direct voltage "G24"
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Characteristic curve |
Symbol |
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1 |
J |
|
2 |
G |
|
3 |
E |
|
4 |
D |
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5 |
C |
|
6 |
H |
|
7 |
Y |
|
8 |
D/OF |
|
9 |
T |
AC voltage “W120R”
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Characteristic curve |
Symbol |
|
1 |
J |
|
2 |
G |
|
3 |
E |
|
4 |
D |
|
5 |
C |
|
6 |
H |
|
7 |
Y |
|
8 |
D/OF |
Symbols
| 1) |
Example: Symbol E with spool position "a" ordering code ..EA.. |
Notices:
Representation according to DIN ISO 1219-1.
Hydraulic interim positions are shown by dashes.
Circuit diagram
The FM-tested valve solenoid of the valve is equipped with a connection compartment and an NPT connection thread (NPT 1/2") for pipelines.
The connection is polarity-independent.
Notice:
When establishing the electrical connection, the protective grounding conductor (PE) has to be connected properly.
Connectable operating voltage conductors and protective grounding conductors
|
Function |
Maximum connectable line cross-section |
|
Terminal area, rated connection (min. 0.13 mm2) |
2.5 mm2 |
|
Conductor connection cross-section AWG (min. AWG 26) |
AWG 14 |
|
Single-wire, min. H05(07) V-U 0.13 mm2 |
2.5 mm2 |
|
Finely stranded, min. H05(07) V-K 0.13 mm2 |
2.5 mm2 |
|
Wire end ferrule with collar DIN 46 228/4 (min. 0.25 mm2) |
1.5 mm2 |
|
Wire end ferrule according to DIN 46 228/1 (min. 0.25 mm2) |
1.5 mm2 |
Connection line
|
Line type |
non-armored cables and lines (outer sheath sealing) | |
|
Temperature range |
°C |
-20 … ≥ +110 |
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 characteristic: medium time-lag according to DIN 41571 |
Maximum voltage value when switching off |
Rated current |
Interference protection circuit |
|
G24 |
24 V DC |
0.899 A DC |
100 mA |
–36 V |
1.65 A |
Suppressor diode bi-directional |
|
W120R |
120 V AC |
0.221 A DC |
200 mA |
– |
0.384 A |
Bridge rectifier 1000 V |
Notice:
Corresponding to the rated current, a fuse according to DIN 41571 and EN / IEC 60127 has to be connected upstream of every valve solenoid (max. 3 x IG).
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 area 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 |
Solenoid |
|
2 |
Terminal box |
|
3 |
Manual override "N" |
|
4 |
Identical seal rings for ports P, A, B, T |
|
5 |
Cap for valves with one solenoid |
|
6 |
Name plate |
|
7 |
Porting pattern according to ISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St, material no. R900005694, separate order) |
|
8 |
Piping connection NPT 1/2” |
Valve mounting screws (separate order)
For reasons of stability, use exclusively the following valve mounting screws:
4 hexagon socket head cap screws
ISO 4762 - M5 x 50 - 10.9-CM-Fe-ZnNi-5-Cn-T0-H-B
(friction coefficient μtotal = 0.09 … 0.14);
material no. R913043758
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05 , see data sheet 45100.
Installation conditions (dimensions in mm)
|
Single 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 |
see schematic diagram below |
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Schematic diagram
Dimensions in mm
Notice:
Observe the "Special application conditions for safe application" see technical data.