Bosch Rexroth | 4WRZ25E325-7X6EG24N9ETK4M
4WRZ25E325-7X/6EG24N9ETK4/M
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The 4WRZ25E325-7X/6EG24N9ETK4/M is manufactured by Bosch Rexroth in the WRZ Proportional Directional Valves series and regulates flow and pressure for hydraulic automation tasks. It provides a nominal flow of 325 l/min at a 10 bar differential, allowing large cylinders or motors to move at the commanded speed. The main stage tolerates 350 bar system pressure, while the internal return line accepts 30 bar on port T so the tank circuit can be routed through long lines or coolers. Pilot control consumes only 7 l/min across a 0–100 percent step, and the pilot chamber volume is 10 cm³, which supports quick spool shifts without excessive oil demand. The housing follows the ISO 4401-08-07-0-94 mounting pattern for direct installation on standard subplates, and NBR seals are fitted for compatibility with mineral hydraulic oil.
The electromagnetic actuator works from a 24 V DC supply and can draw up to 1.5 A under full command, with a room-temperature coil resistance of 4.8 Ω determining current rise. It is rated for a 100 percent duty cycle, and the winding can reach 150 °C without loss of performance. Command repeatability is maintained because hysteresis does not exceed 6 percent of span. Electrical termination uses a DIN EN 175301-803 connector for quick field replacement, and the assembled connector grants an IP65 enclosure rating that resists dust and water jets. Fluid entering the main stage must meet ISO 4406 cleanliness class 20/18/15 to prevent wear and maintain precise metering.
Technical Specifications
Cleanliness Class (main Valve)
20/18/15 (ISO 4406)
Coil Resistance (20 °c)
4.8 ohm
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Hysteresis
≤ 6%
Ingress Protection
IP65 (with socket)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Mounting Pattern
ISO 4401-08-07-0-94
Nominal Flow @ Δp=10 Bar
325 l/min
Pilot Oil Flow (x/y) @ Step 0-100%
7 l/min
Pilot Oil Volume @ Step 0-100%
10 cm3
Rated Voltage
24 V DC
Return Flow Pressure T (internal)
30 bar
Seal Material
NBR
1620 Old Apex Road
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