Bosch Rexroth | 4WRZ32E520-7X6EG24N9ETK4M
4WRZ32E520-7X/6EG24N9ETK4/M
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The 4WRZ32E520-7X/6EG24N9ETK4/M valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is used to meter flow and direct pressure in hydraulic automation circuits. With a nominal size of 32, it accommodates large passage areas, and its nominal flow reaches 520 l/min at a 10 bar pressure drop to support rapid actuator movement. The main stage withstands operating pressures up to 350 bar, allowing installation in high-pressure manifolds. A 24 V DC coil powers the proportional solenoid and can draw as much as 1.5 A; the winding shows 4.8 Ω resistance at 20 °C and 7.2 Ω at maximum temperature, giving predictable current limits. Continuous service is possible because the duty cycle is 100%, and a mass of 42.2 kg provides the rigidity needed for stable mounting.
A pilot valve of size 6 handles control oil, and the pilot supply and drain are internal (ET), which removes the need for external lines. Electrical hookup is made through a DIN EN 175301-803 K4 plug, while an IP65 rating—with the socket installed—protects the assembly from dust and low-pressure water jets. The hydraulic medium must meet ISO 4406 20/18/15 cleanliness to limit spool wear and maintain proportional accuracy. Thermal endurance extends to a coil temperature of 150 °C, so the unit remains reliable in warm power packs. The internal drain path tolerates T-port pressures up to 30 bar, defining the return-line backpressure that can be applied without affecting performance.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Coil Resistance (max Hot)
7.2 Ω
Duty Cycle
100%
Electrical Connection
Plug DIN EN 175301-803 (K4)
Fluid Cleanliness (main)
ISO 4406 20/18/15
Ingress Protection
IP65 (with socket)
Max Coil Temperature
150 °C
Max Operating Pressure (main)
350 bar
Max Solenoid Current
1.5 A
Max T-port Pressure (internal Drain)
30 bar
Nominal Flow (Δp 10 Bar)
520 l/min
Nominal Size
32
Pilot Supply/drain
Internal (ET)
Pilot Valve Size
6
Rated Voltage
24 V DC
Weight
42.2 kg
1620 Old Apex Road
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