Bosch Rexroth | 4WRZ25W6-220-7X6EG24N9ETK4D3M
4WRZ25W6-220-7X/6EG24N9ETK4/D3M
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The 4WRZ25W6-220-7X/6EG24N9ETK4/D3M proportional directional valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series. It regulates flow and directional control in automated hydraulic circuits that require variable actuation. The unit uses a proportional, detachable coil solenoid to modulate spool position, while a maximum current of 1.5 A determines the highest control signal it can accept. The coil may reach up to 150 °C during continuous duty, so thermal limits must be considered when selecting enclosure ventilation. Electrical power is supplied through a DIN EN 175301-803 connector, simplifying replacement in standard industrial harnesses. A nominal flow of 220 l/min at a 10 bar differential allows the valve to serve large actuators without excessive pressure loss. The ISO 4401-08-07-0-94 mounting pattern matches common subplates for size 25 directional valves, and the assembly weighs 18.2 kg, a factor for manifold support design.
For environmental protection, the enclosure carries an IP65 rating, keeping dust tight and guarding against water jets in wash-down zones. A concealed N9 manual override permits local movement of the spool without energizing the solenoid, aiding maintenance while preventing accidental actuation. The main stage tolerates operating pressures up to 350 bar, whereas the internal T port is limited to 30 bar, so return line sizing must respect this difference. Internal pilot oil supply and internal pilot drain simplify plumbing by eliminating external pilot lines, and they pair with a pilot valve size 6 to keep control flow low. The integrated ZDR 6 DP0-4X/40YM-W80 pressure reducing valve stabilizes pilot pressure to maintain consistent metering across load changes. Approved HL or HLP fluids under DIN 51524 are required for lubrication and sealing compatibility, ensuring long service life of the spool and bushings.
Technical Specifications
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid
HL/HLP (DIN 51524)
Ip Rating
IP65
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Max Port T Pressure (internal)
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
Pilot Valve Size
6
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Solenoid Type
Proportional, Detachable Coil
Weight
18.2 kg
1620 Old Apex Road
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