Bosch Rexroth | 4WRZE25W9-220-7X6EG24N9K31F1D3V
4WRZE25W9-220-7X/6EG24N9K31/F1D3V
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The 4WRZE25W9-220-7X/6EG24N9K31/F1D3V valve belongs to the WRZ Proportional Directional Valves series produced by Bosch Rexroth for hydraulic automation tasks that require electrically modulated flow and directional control. It passes a nominal flow of 220 l/min at a 10 bar differential to move large actuator volumes, and it tolerates system pressures up to 350 bar so it can be placed in high-pressure circuits. A 4–20 mA command signal allows direct interface with most analog controller cards, while the internal electronics run from a 24 V DC supply that may vary between 19 and 35 V DC; peak current demand reaches 1.8 A, so the power source must be sized accordingly. Ramp time is adjustable from 0 to 2.5 s to smooth cylinder acceleration and deceleration, and overall hysteresis is kept at or below 6 percent to maintain repeatable spool positioning.
Center leakage stays below 2 percent of the nominal cross-section to limit energy loss during neutral operation. The valve is intended for mineral oil HL or HLP fluids defined by DIN 51524, and it functions with viscosities between 20 and 380 mm²/s to cover common temperature-related changes in oil thickness. Fluid temperatures can range from −20 °C to +80 °C, while the cleanliness of the oil must achieve ISO 4406 class 20/18/15 to protect the precision metering edges. Installation takes place on an ISO 4401-08-07-0-94 subplate; port sizes are 25 mm for A, B, and T and 24 mm for P, giving clear guidance for line selection. Electrical hookup uses a DIN EN 175201-804 connector, and the housing carries an IP65 rating to block dust and water jets in industrial environments.
Technical Specifications
Center Leakage
<2% Nominal Cross-Section
Cleanliness Class Main Valve
20/18/15
Command Input
4 to 20 mA
Electrical Connector
DIN EN 175201-804
Fluid Temperature Range
-20 to +80 C
Hydraulic Fluid
Mineral Oil HL/HLP (DIN 51524)
Hysteresis
<= 6%
Max Operating Pressure
350 bar
Max Supply Current
1.8 A
Mounting Interface
ISO 4401-08-07-0-94
Nominal Flow
220 l/min (10 bar dP)
Port Diameters
A/B/T 25 mm; P 24 mm
Protection Class
IP65
Ramp Time Adjustment
0 to 2.5 s
Supply Voltage
24 V DC (19 to 35 V DC)
Viscosity Range
20 to 380 mm2/s
1620 Old Apex Road
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