Bosch Rexroth | 4WRZ32E520-7X6EG24N9ETK4D3M
4WRZ32E520-7X/6EG24N9ETK4/D3M
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The 4WRZ32E520-7X/6EG24N9ETK4/D3M proportional directional valve belongs to the WRZ Proportional Directional Valves series manufactured by Bosch Rexroth for hydraulic automation tasks that require controlled flow and directional change. It conveys 520 L/min at a 10 bar pressure drop, and the main stage tolerates up to 350 bar system pressure. The solenoid operates on direct current and draws as much as 1.5 A; the coil shows 4.8 Ω resistance at 20 °C to match this demand. Pilot oil is supplied internally, the pilot valve is size 6, and oil is also drained internally, all of which reduce external piping. A fixed pilot pressure of 40 bar maintains spool positioning under load.
The electrical winding endures temperatures up to 150 °C during continuous duty. When the command shifts from zero to full stroke, pilot oil flow reaches 15.9 L/min, and 26.5 cm³ of pilot oil is displaced to move the spool. The internal return port withstands back pressure to 30 bar, allowing connection to shared tank headers. These electrical, hydraulic, and thermal limits define the operating envelope for the valve.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Nominal Flow (Δp=10 Bar)
520 l/min
Pilot Oil Drain
Internal
Pilot Oil Flow (step 0→100%)
15.9 l/min
Pilot Oil Supply
Internal
Pilot Oil Volume (0→100%)
26.5 cm³
Pilot Pressure Setting
40 bar
Pilot Valve Size
6
Return Port T Pressure (internal)
30 bar
Type Of Voltage
DC
1620 Old Apex Road
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