Артикул: RX7385
Directional spool valves, direct operated, with solenoid actuation, fast switching WES
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Description
- Size 8
- Component series 1X
- Maximum operating pressure 350 bar
- Maximum flow 300 l/min
Features
- 3/2-way version
- Cartridge valve
- Fast switching, clocked DC solenoid
- Conrol using analog amplifiers
Product description
Directional valves of type WES are fast-switching solenoid-actuated directional spool valves. Electrical and hydraulic components are combined in a compact design. These components control the start and stop of the flow.
The directional valve basically consists of the housing (1), an integrated solenoid (2), the control spool (3), a thread ring (4), mounting plate (5) and one stop bushing (6) with return spring (7).
The fast-switching solenoids (2) are controlled via a booster amplifier supplying a pulse-width modulated voltage and current signal. To achieve the specified switching time and flow values, a defined current profile must be complied with (see page 6).
The force of the solenoid (2) acts on the control spool (3) and pulls the latter from its initial position to the blocked switching position. This way, the direction of flow from P to A1 and A2 is blocked.
After switching off of the solenoid (2), the return spring (7) pushes the control spool (3) back to its initial position.
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | ||
| 3 | WES | 8 | P | 1X | K | / | A | G24 | CK50 | / | V | SO1 | * |
| 01 | 3 main ports (P, A, (A1+A2)) | 3 |
| 02 | Directional spool valve, direct operated, fast switching | WES |
| 03 | Size 8 | 8 |
| Symbol | ||
| 04 | Normally open | P |
| 05 | Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) | 1X |
| 06 | Cartridge valve | K |
| 07 | Fast switching solenoid coil | A |
| 08 | Direct voltage, clocked 24 V | G24 |
| Electrical connection | ||
| 09 | Connection line 5 m with litz wire 2 x 1.5 mm2 | CK50 |
| Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") | ||
| 10 | FKM seals | V |
| 11 | Improved switch-off power limit | SO1 |
| 12 | Further details in the plain text | * |
| 1) | Symbol representation according to DIN ISO 1219‑1 |
Technical data
(For applications outside these values, please consult us!)
general
| Size | 8 | ||
| Installation position | any | ||
| Ambient temperature range | °C | +20 … +85 | |
| Transport temperature range | °C | -40 … +85 | |
| Storage temperature range | °C | -20 … +50 | |
| Maximum surface temperature of the valve 1) 2) 3) | °C | + 85 | |
| Life cycle rating B10 value | Switching cycles | 675 million | |
| Weight | Valve | kg | 1.2 |
| Valve with 5 m cable | kg | 1.9 | |
| 1) | In installed condition |
| 2) | Surface temperature > 50 °C, provide contact protection. |
| 3) | Operating conditions: installed in control block +70 °C, hydraulic fluid temperature +70 °C |
hydraulic
| Size | 8 | ||
| Maximum operating pressure | bar | 350 | |
| Maximum flow | l/min | 300 | |
| Hydraulic fluid | see table "Hydraulic fluid" | ||
| Hydraulic fluid temperature range | HL, HLP | °C | +40 … +70 |
| SAE 40 | °C | +60 … +70 | |
| Viscosity range | HL, HLP | mm²/s | 15 … 46 |
| SAE 40 | mm²/s | 35 … 55 | |
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 21/19/15 | ||
| 1) | 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 |
| Mineral oils | HL, HLP | FKM | DIN 51524 |
| Motor oils | Exxon Mobil Mobilgard M440 (SAE 40), | FKM | |
| Important information on hydraulic fluids:
| |||
electrical
| Voltage type | Direct voltage | ||
| Performance rating according to VDE 0580 1) | W | 25 | |
| Duty cycle | ≤50 (S1 according to VDE 0580) | ||
| Switching time according to ISO 6403 | ON | ms | ≤ 7 |
| OFF | ms | ≤ 5 | |
| Maximum switching frequency 1) | Hz | 10 | |
| Protection class according to EN 60529 | IP66 (with correctly installed electrical connection) | ||
| Thermal class according to VDE 0580 | Insulation | B | |
| Enameled copper wire | 200 | ||
| Protection class according to VDE 0580 | III (protective extra-low voltage) | ||
| Overvoltage category according to VDE 0580 | III | ||
| Upper limit temperature of coil winding | °C | < 125 | |
| Ohmic resistance (incl. 5 m connection line) | at maximum admissible coil temperature | Ω | 1.06 |
| at +20 °C coil temperature | Ω | 0.78 | |
| 1) | Operating conditions: installed in control block +70 °C, hydraulic fluid temperature +70 °C |
Control electronics
| Boost voltage (U1) | V | 60 -6 | |
| Current | Boost (I1; peak) | A | 14 ±1 |
| Pick-up (I2; average) | A | 12 ±0,5 | |
| Hold (I3; average) | A | 3 ±0,5 | |
| Pick-up hysteresis (I4; peak-peak) | A | ≤1 | |
| Hold hysteresis (I5; peak-peak) | A | ≤1 | |
| Pick-up time (t3) | ms | 5 +0,5 | |
| Decay time | Hold (t4) | ms | ≤0,2 |
| Idle (t5) | ms | ≤0,4 | |
| PWM frequency | Hz | freely clocking | |
| Operating voltage / pulse voltage | V | 24 ±10 % | |
| To achieve the technical data of the valve, the fast-switching valve solenoid must be operated with the following voltage and current profile 14/12/3 A (boost/pick-up/hold). | |||
Electrical connection
| Connection line | two-core | |
| Line cross-section | mm2 | 1,5 |
| Line diameter | mm | 7,3/7,9 oval |
| Length | m | 5 |
| The valve solenoid is equipped with an electrical connection "CK50" according to the following specifications. The electrical connection of the solenoid is polarity-independent. The two-core connection line (black) cannot be exchanged. | ||
Notices:
- The solenoid coil requires current-controlled operation.
- The booster amplifier is not included in the scope of delivery.
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves
P → A (A1+A2)
Performance limits
(measured with HLP46, ϑOil = 40 ±5 °C)
Voltage and current profile
| t1 | Attraction time |
| t2 | Fall time |
| t3 | Boost time (boost phase) |
| t4 | Pick-up time |
| t5 | Actuation time |
| t6 | Decay to hold time |
| t7 | Decay to idle time |
| I1 | Boost current (peak) |
| I2 | Pick-up current (average) |
| I3 | Hold current (average) |
| I4 | Pick-up current hysteresis (peak–peak) |
| I5 | Hold current hysteresis (peak–peak) |
| U1 | Boost voltage |
| U2 | Operating voltage |
| U3 | Diode voltage |
Symbols/Circuit diagrams
Notice:
Representation according to ISO 1219-1.
Dimensions
Dimensions in mm
| 1 | Cable bushing |
| 2 | Connection line, two-core |
| 3 | Mounting plate |
| 4 | Disassembly bores |
| 5 | Outer seal rings |
| 6 | Valve mounting screws |
Valve mounting screws (separate order)
| Quantity | Hexagon socket head cap screws |
| 4 | ISO 4762 - M8 x 35 - 10.9 |
| or | |
| 4 | ASME B18.3-5/16-18UNC x 1-1/2” ASTM-A574 (Friction coefficient μtotal = 0,19 … 0,24) Tightening torque MA = 41 Nm ±10 % (Friction coefficient μtotal = 0,12 … 0,17) Tightening torque MA = 30 Nm ±10 % |
| Respectively with one washer ASME B18.22.1-5/16-B (type B Narrow FBN) | |
Notices:
- The specified tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10%).
- The dimensions are nominal dimensions which are subject to tolerances.
Installation bore
Dimensions in mm
| 1) | Depth of fit |
| 1 | Mounting plate contact surface |
| LS | Location shoulder |
Notices:
- Minimum distance between the valve axes is ≥65 mm.
- Minimum edge distance from valve axis to installation block edge ≥49 mm.
Project planning information
- The drain line must be preloaded with a pressure of 3…5 bar.
- Characteristic curves and technical data can only be achieved by the defined current profile of the control electronics (see "Characteristic curves").
- The hydraulic system must be fully bled, see data sheet 07600.
- The connection line must be attached at a distance of <300 mm from the valve and secured against twisting.
- The minimum bending radius of the connection line of 5 x line diameter must not be fallen below.
- Do not pull at the connection line or valve connector.
- Do not paint over the name plate.
- After 2.5 years or 340 load cycles, replacement of the outer seals is recommended (material no. R961009419).
- The space required to remove the valve is 222 mm
Installation
- Before installation, lubricate the outer seals at the valve with hydraulic fluid.
- Slide the valve by hand into the installation bore (see "Dimensions").
- Tighten 4 hexagon socket head cap screws (see "Dimensions")
- After installation, there must not remain any gap between the mounting plate (see "Dimensions") and the block.
Disassembly
- Remove 4 hexagon socket head cap screws (see "Dimensions").
- Alternately screw 2 M5 hexagon socket head cap screws into the disassembly bores (see "Dimensions") until the valve is released from the installation bore by at least 4 mm.
- Remove the valve by hand from the installation bore.
Notice:
For installation and disassembly, observe operating instructions07600-B.
Ordering codes
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 | Directional spool valves, direct-operated, with solenoid actuation, fast-switching Data Sheet | RE23080 | 2020-05-01 | English | PDF | 435k Product Groups: Direct operated Type WES |
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