Bosch Rexroth | 4WRZ32W8-520-7X6EG24N9ETK4D3V
4WRZ32W8-520-7X/6EG24N9ETK4/D3V
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The 4WRZ32W8-520-7X/6EG24N9ETK4/D3V valve belongs to the WRZ Proportional Directional Valves series manufactured by Bosch Rexroth and meters hydraulic flow in automation circuits where adjustable positioning and load control are required. It is built for nominal size 32 interfaces and delivers 520 l/min at a 10 bar differential to support high-throughput actuators. A maximum operating pressure of 350 bar permits service in heavy-duty presses without exceeding component stress limits. The unit follows the ISO 4401-10-08-0-94 port pattern, allowing standardized mounting. Electrical actuation is supplied with 24 V DC and wiring is completed through a DIN EN 175301-803 connector for compatibility with common machine harnesses. A concealed manual override lets technicians shift the spool during commissioning or power loss. Pilot control includes a ZDR 6 DP0-4X/40YM-W80 pressure-reducing valve, and the pilot oil flow from 0 to 100 percent equals 15.9 l/min for precise proportional response.
The valve maintains fluid cleanliness at 20/18/15 per ISO 4406 to protect the spool lands from abrasion. It operates with HL or HLP oils defined by DIN 51524, ensuring viscosity and lubrication suitable for proportional control. Internal pilot oil supply removes the need for external feed lines, and internal pilot oil drain routes spent pilot fluid back to tank without extra plumbing. Return flow in port T can reach 30 bar, a limit that must be observed when sizing the tank line to prevent back-pressure interference. FKM seals resist heat and aggressive additives common in industrial oils, extending service intervals. Total weight for subplate mounting is 42.2 kg, so adequate support and lifting fixtures are necessary during maintenance. These characteristics combine to offer a proportional valve that integrates quickly, maintains stability under load, and preserves internal components through proper filtration and material selection.
Technical Specifications
Cleanliness Class (main)
20/18/15 (ISO 4406)
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid
HL, HLP (DIN 51524)
Manual Override
Concealed
Max Operating Pressure (main)
350 bar
Nominal Flow @ Δp 10 Bar
520 l/min
Nominal Size
32
Pilot Oil Drain
Internal
Pilot Oil Flow 0→100%
15.9 l/min
Pilot Oil Supply
Internal
Port Pattern
ISO 4401-10-08-0-94
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Return Flow Pressure Port T (int Drain)
30 bar
Seals
FKM
Supply Voltage
24 V DC
Weight (subplate Mounting)
42.2 kg
1620 Old Apex Road
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