Bosch Rexroth | 4WRZ25W6-325-7X6EG24N9K4M
4WRZ25W6-325-7X/6EG24N9K4/M
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The 4WRZ25W6-325-7X/6EG24N9K4/M valve is manufactured by Bosch Rexroth for the WRZ Proportional Directional Valves series and is used to modulate hydraulic flow in automated equipment. Its solenoid operates on a 24 V DC supply, and the coil resistance is 4.8 Ω at 20 °C, establishing predictable power demand while the current limit is 1.5 A. A DIN EN 175301-803 connector provides standardized electrical hookup, and the enclosure attains an IP65 rating to block dust and water jets. The body conforms to the ISO 4401-08-07-0-94 porting pattern for direct subplate mounting. Mineral oil classified as HL or HLP is the approved hydraulic medium, and service temperatures from −20 °C to +80 °C cover most mobile and industrial power units. A concealed manual override gives technicians local spool actuation during setup, and system cleanliness must meet ISO 4406 class 20/18/15 to protect the metering edges.
The main stage withstands operating pressures up to 350 bar so it can function in high-pressure circuits, and a nominal flow of 325 l/min at 10 bar differential pressure supports large-volume actuators. Pilot control requires only 7 l/min to move from 0 to 100 percent, and a 10 cm³ pilot volume promotes rapid response with minimal compressibility lag. Port Y may be pressurized to 30 bar for controlled drainage, while the return port T can accept up to 250 bar when an external drain is routed to a pressurized reservoir. These pressure allowances broaden mounting options and simplify line routing. Combined, the flow capacity, pressure limits, and pilot characteristics allow the valve to deliver proportional metering accuracy in closed-loop hydraulic systems.
Technical Specifications
Cleanliness Class (main)
ISO 4406 20/18/15
Coil Resistance (20 °c)
4.8 Ω
Electrical Connector
DIN EN 175301-803
Fluid Temperature Range
-20 to +80 °C
Hydraulic Fluid
Mineral Oil (HL, HLP)
Manual Override
Concealed
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Nominal Flow (10 Bar Δp)
325 l/min
Pilot Oil Flow (0–100% Step)
7 l/min
Pilot Oil Volume (0–100%)
10 cm3
Port Y Pressure
30 bar
Porting Pattern
ISO 4401-08-07-0-94
Protection Rating
IP65
Return Port T Pressure (ext Drain)
250 bar
Supply Voltage
24 V DC
1620 Old Apex Road
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