Bosch Rexroth | 4WRBKE27W3-430SJ-1X6ZG24EK31A1D3M
4WRBKE27W3-430SJ-1X/6ZG24EK31/A1D3M
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The 4WRBKE27W3-430SJ-1X/6ZG24EK31/A1D3M valve is manufactured by Bosch Rexroth and belongs to the 4WRBKE OBE Valves series. It serves as an electro-hydraulic directional unit that meters oil to actuators under closed-loop electronic control. The integrated electronics run from a 24 V DC supply voltage, eliminating external amplifiers in the cabinet. A ±10 V input signal allows the controller to drive the spool proportionally, linking motion commands directly to flow output. Installation follows the ISO 4401-08-07-0-94 mounting interface so the body fastens to standard subplates. The nominal size is NG27, and the design supports a nominal flow rate of 430 l/min for circuits that require high volume transfer. A progressive flow characteristic shapes the metering curve, providing fine resolution near the center and larger openings at higher strokes. Control oil is fed internally through channel x, while the outlet is routed externally at port y to keep the pilot stage free of return line pressure.
The hydraulic ports tolerate a maximum working pressure of 280 bar at p, A, and B, permitting use in systems that operate near common high-pressure standards. When the pilot return is taken externally the T-port withstands 250 bar, whereas an internal return limits that path to 50 bar, giving designers two options for their backpressure conditions. The main spool can travel ±10 mm, defining the full metering range available to the electronics. A response time of no more than 60 ms from 0 to 100 % command supports rapid position or force changes in servo loops. Hysteresis is held within 0.3 %, so repeated commands produce consistent flow without drift. An IP65 degree of protection shields the housing against dust ingress and low-pressure water jets, enabling installation on exposed machinery. The assembled valve weighs 18.8 kg, a consideration for manifold design and maintenance handling.
Technical Specifications
Control Oil Outlet
External (y)
Control Oil Supply
Internal (x)
Degree Of Protection
IP65
Flow Characteristic
Progressive (S)
Hysteresis
0.3% (max)
Input Signal
±10 V
Max Pressure In T (y External)
250 bar
Max Pressure In T (y Internal)
50 bar
Max Working Pressure (p, A, B)
280 bar
Mounting Interface
ISO 4401-08-07-0-94
Nominal Flow Rate
430 l/min
Nominal Size
NG27
Response Time (0–100%)
60 ms (max)
Spool Stroke (main Stage)
±10 mm
Supply Voltage
24 V DC
Weight
18.8 kg
1620 Old Apex Road
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