Bosch Rexroth | 4WRDE16V125L-5X6L24ETK9M-280
4WRDE16V125L-5X/6L24ETK9/M-280
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The 4WRDE16V125L-5X/6L24ETK9/M-280 valve belongs to the 4WRDE Directional Control Valves series by Bosch Rexroth and functions as an electrically modulated spool for hydraulic automation circuits. It is built for the NG16 size, giving designers a standardized envelope for medium-flow manifolds. The unit accepts a 24 VDC supply so that the solenoid can be driven directly from common machine power rails; operation is maintained down to 18 VDC and remains permitted up to 36 VDC to tolerate voltage variation. Nominal current draw is limited to 200 mA, allowing compact power supplies. A dither signal at 400 Hz reduces static friction on the spool and improves proportional positioning. When fully shifted, the valve passes up to 460 l/min, while individual service ports A, B, P, and T are machined with 20 mm bores to minimize pressure loss. The mounting interface follows ISO 4401-07-07-0-05, enabling direct replacement on standardized subplates.
For pilot operation, the internal stage delivers 15.6 l/min at 250 bar in discrete steps, and the total pilot chamber displacement across the 0–100 percent stroke is 2.9 cm³. At a holding condition of 100 bar, zero-flow leakage through the pilot valve is limited to 0.8 l/min, supporting precise cylinder positioning. Correct clamping requires m10 bolts tightened to 58 Nm, securing the body against manifold face deformation. The enclosure meets the IP65 protection class, so dust ingress and low-pressure water jets do not affect the electronics. Reliable service is further supported when ambient relative humidity rises to 95 percent, making the valve suitable for damp production areas. A mass of 10.5 kg offers a balance between structural rigidity and manageable handling during installation.
Technical Specifications
Dither Frequency
400 Hz
Lower Voltage Limit
18 VDC
Max Current Consumption
200 mA
Max Relative Humidity
95%
Maximum Flow
460 l/min
Mounting Bolt Torque (m10)
58 Nm
Pilot Oil Step Flow (250 Bar)
15.6 l/min
Pilot Oil Volume (0–100%)
2.9 cm³
Port Bore Diameter (a, B, P, T)
20 mm
Porting Pattern
ISO 4401-07-07-0-05
Protection Class
IP65
Size
NG16
Supply Voltage
24 VDC
Upper Voltage Limit
36 VDC
Weight
10.5 kg
Zero Flow Pilot Valve (100 Bar)
0.8 l/min
1620 Old Apex Road
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