Function and configurations4WREE are operated by proportional solenoids with central thread and removable coil. The solenoids are optionally controlled by either external electronics type 4WREE.The va...
Product Detail
Function and configurations
4WREE are operated by proportional solenoids with central thread and removable coil. The solenoids are optionally controlled by either external electronics type 4WREE.
The valve basically consists of: Housing (1), Compression springs (2), Control spool (3), and Solenoid (4 and 5) with central thread, Solenoid (5) with position transducer and optional integrated control electronics (6).
In the de-energised condition the spool (3) is held in a mechanical centre position by the solenoid return springs (2).
– With the solenoids (4), de-energised, the control spool (3) is held in the central position by the compression springs (2).
– Direct operation of the control spool (3) by energising one of the proportional solenoids (4 and 5) e.g. control of solenoid right, then movement of the control spool (3) to the left in proportion to the electrical input signal, and connection from P to A and B to T via orifice-like crosssections with progressive flow characteristics.
4WREE...A-L2X the 2 switched position valves are however only fitted with solenoid "a".
A plug (7) is fitted in place on the "b" proportional solenoid.
Symbols
Ordering code
| 1.Hydraulic | ||||
| Installation | Optional,preferably horizontal | |||
| Nominal size | 6 | 10 | ||
| Weight | 4WREE...L2X | kg | 2.4 | 6.5 |
| Nominal flow qnom at Δp= 10 bar | L/min | 8,16,32 | 25,50,75 | |
| Hysteresis | % | ≤0.1 | ||
| Reversal span | % | ≤0.05 | ||
| Response sensitivity | % | ≤0.05 | ||
| Max.operating pressure | Ports A, B,P | bar | 315 | |
| Port T | bar | 210 | ||
| Pressure fluid | Mineral oil (HL, HLP) to DIN 51524 | |||
| Other pressure fluids on request! | ||||
| Ambient air temperature range | 4WREE...L2X | ℃ | -20℃ to 50℃ (-4°Fto 122°F) | |
| Viscosity range | m㎡/s | 20 to 380 (preferably 30 to 46) | ||
| Fluid Cleanliness Class | NAS1638 class9 or ISO 4406 class 20/18/15 | |||
| 2.Electrical | ||||
| 1) Solenoid data | ||||
| Nominal size | 6 | 10 | ||
| Voltage type | DC | |||
| Command value signal for 4WREE | ±10V or 4~20mA | |||
| Max.current per solenoid | A | 2.5 | ||
| Solenoid coil resistance | Cold value | Ω | 2.7 | 3.7 |
| Max.warm value | 4.05 | 5.55 | ||
| Duty | % | ED100% | ||
| Max.coil temperature | ℃ | 150 | ||
| Valve protection to EN 60529 | IP 65 | |||
| 2) Control electronics | ||||
| Amplifier | 4WREE...L2X | integrated in the valve(OBE) | ||
| Supply voltage | Nominal voltage | VDC | 24 | |
| Lower limiting value | V | 19.4 | ||
| Upper limiting value | V | 35 | ||
| Amplifier power consumption | Imax | A | <2 | |
| Impulse current | A | 3 | ||
Electrical connections, plug-in connectors
Integrated control electronics for type 4WREE
Integrated electronics (OBE) for type 4WREE...L2X
Integrated control electronics for type 4WREE
Characteristic curves(measured with HLP46, oil =40°C +5°C)
Characteristic curves(measured with HLP46, oil=40°C +5°C, P=100bar)
Characteristic curves(measured with HLP46,oil =40°C +5°C, P=100bar)
Characteristic curves(measured with HLP46, oil=40°C I5°C, P=100bar)
Unit dimensions
Unit dimensions
