Bosch Rexroth | 4WRZ32E520-7X6EG24N9K4D3V
4WRZ32E520-7X/6EG24N9K4/D3V
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The 4WRZ32E520-7X/6EG24N9K4/D3V proportional directional valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and is intended to meter flow and direct pressure in hydraulic automation. It uses the ISO 4401-10-08-0-94 mounting interface so it fits standard subplates, and its nominal size of 32 provides passage area for high-volume circuits. A nominal flow of 520 l/min at a 10 bar differential pressure supports fast cylinder movement, while hysteresis of no more than 6 percent improves repeatable positioning. The pilot stage needs 15.9 l/min to shift the spool through a 0–100 percent command, giving the control input a consistent response. Mineral oil of the HL or HLP types specified in DIN 51524 is the required hydraulic fluid, ensuring compatibility with internal materials. Cleanliness of the main valve must meet ISO 4406 class 20/18/15 to keep the precision spool edges free from abrasive particles.
The assembly withstands a main system pressure of 350 bar, allowing use in high-pressure machinery, while port Y is limited to 30 bar and the external drain at port T handles return pressures up to 150 bar to prevent back-pressure from affecting operation. Flow channels share a diameter of 38 mm, giving balanced flow capacity across ports. Electrical connection is made with a DIN EN 175301-803 plug for straightforward coil wiring, and a concealed manual override lets technicians shift the spool without energizing the solenoid during setup. FKM seals provide chemical and temperature resistance suited to mineral oil service, and the complete valve weighs 42.2 kg, which influences mounting support requirements. The pilot valve requires oil cleanliness to ISO 4406 class 18/16/13, maintaining control accuracy under continuous duty.
Technical Specifications
Cleanliness Class (main Valve)
20/18/15 (ISO 4406)
Cleanliness Class (pilot Valve)
18/16/13 (ISO 4406)
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid
Mineral Oil (HL, HLP) DIN 51524
Hysteresis
<= 6%
Manual Override
Concealed
Max Operating Pressure (main)
350 bar
Max Pressure Port Y
30 bar
Max Return Pressure Port T (ext. Drain)
150 bar
Mounting Interface
ISO 4401-10-08-0-94
Nominal Flow (10 Bar Dp)
520 l/min
Nominal Size
32
Pilot Oil Flow (0-100% Step)
15.9 l/min
Port Diameters (a/b/p/t)
38 mm
Seal Material
FKM
Weight
42.2 kg
1620 Old Apex Road
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