Bosch Rexroth | 4WRZ25W8-220-7X6EG24N9ETK4D3V
4WRZ25W8-220-7X/6EG24N9ETK4/D3V
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The 4WRZ25W8-220-7X/6EG24N9ETK4/D3V proportional directional valve is engineered by Bosch Rexroth for the WRZ Proportional Directional Valves series and directs fluid to actuators in automated hydraulic systems. A nominal flow of 220 l/min at a 10 bar differential supports high-speed cylinder movement, while a maximum operating pressure of 350 bar matches heavy-duty circuit demands. Port A, B, and T each have a 25 mm diameter to reduce velocity losses, and the body fits subplates that use the ISO 4401-08-07-0-94 mounting pattern. External return lines may reach 250 bar, whereas internal return routing is limited to 30 bar to protect the tank passage. Pilot galleries must remain within cleanliness class 18/16/13 according to ISO 4406 to preserve metering accuracy, and the complete assembly weighs 18.2 kg, requiring secure handling during installation.
Electromagnetic actuation is provided by a 24 V DC coil that can be driven directly from typical machine controllers, and the coil housing carries an IP65 rating to block dust and water jets. Mineral oil fluids in the HL or HLP categories are recommended, and all wetted interfaces are sealed with FKM elastomers to maintain compatibility at elevated temperatures. A built-in pressure-reducing valve, type ZDR 6 DP0-4X/40YM-W80, stabilizes pilot pressure so that spool position remains proportional to command current. Both pilot supply and pilot drain are internal, which removes external tubing and simplifies manifold layouts. When the control system is offline, a concealed manual override lets maintenance staff shift the spool without exposing moving parts to contaminants. These features combine to provide consistent flow regulation in presses, molding machines, and other automated installations.
Technical Specifications
Cleanliness Class (pilot)
18/16/13 (ISO 4406)
Coil Voltage
24 V DC
Hydraulic Fluid
Mineral Oil (HL, HLP)
Ingress Protection
IP65
Manual Override
Concealed
Max Operating Pressure
350 bar
Max Port T Pressure (ext)
250 bar
Max Port T Pressure (int)
30 bar
Mounting Pattern
ISO 4401-08-07-0-94
Nominal Flow (Δp=10 Bar)
220 l/min
Pilot Oil Drain
Internal
Pilot Oil Supply
Internal
Port A/b/t Diameter
25 mm
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Seal Material
FKM
Weight
18.2 kg
1620 Old Apex Road
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