Bosch Rexroth | 4WRZ32R520-7X6EG24N9K4D3M
4WRZ32R520-7X/6EG24N9K4/D3M
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The 4WRZ32R520-7X/6EG24N9K4/D3M valve is produced by Bosch Rexroth as part of the WRZ Proportional Directional Valves series. It meters flow to hydraulic actuators in automated machinery, using a 24 V DC supply to energize the proportional solenoid. The control electronics are expected to deliver up to 1.5 A, which matches the coil’s peak demand. A DIN EN 175301-803 (K4) connector provides straightforward electrical hookup, while the coil can operate up to 150 °C before derating becomes necessary. For manual intervention the unit includes a concealed override identified by the N9 code. The subplate mounting follows the ISO 4401-10-08-0-94 pattern so it drops onto standard manifolds, and a mass of 42.2 kg must be supported during installation. At a differential pressure of 10 bar the main stage passes 520 l/min, a value adequate for large cylinder circuits, and it withstands system pressures up to 350 bar on the pressure ports. Pilot oil is taken from an external source to prevent load-induced fluctuations from disturbing the control spool.
Drain handling, rated at 150 bar on port T when an external line is used, protects the housing from back-pressure. The hydraulic cleanliness targets are ISO 4406 20/18/15 for the main stage and 18/16/13 for the pilot stage, therefore filtration must be selected to keep particle counts below these limits. The valve is designed for mineral oil to DIN 51524 HL or HLP, and NBR sealing ensures material compatibility with that fluid group. An in-line pressure reducing cartridge, type ZDR 6 DP0-4X/40YM-W80, stabilizes pilot pressure so the proportional magnet sees consistent operating conditions. These characteristics collectively maintain accurate spool positioning and stable flow across the rated operating envelope.
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 (K4)
Hydraulic Fluid
Mineral Oil (HL, HLP) DIN 51524
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main Valve)
350 bar
Max Port T Pressure (ext Drain)
150 bar
Mounting Interface
ISO 4401-10-08-0-94
Nominal Flow At ∆p = 10 Bar
520 l/min
Pilot Oil Supply
External
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Seal Material
NBR (M)
Supply Voltage
24 V DC
Weight (subplate Mounting)
42.2 kg
1620 Old Apex Road
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