Bosch Rexroth | 4WRZE10E1-85-7X6EG24ETK31A1D3M
4WRZE10E1-85-7X/6EG24ETK31/A1D3M
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The 4WRZE10E1-85-7X/6EG24ETK31/A1D3M is manufactured by Bosch Rexroth and belongs to the WRZ Proportional Directional Valves series. It converts an electrical reference into proportional spool displacement for directional control in hydraulic automation. The valve accepts a ±10 V command signal under option A1, enabling proportional spool positioning from common analog controllers. A 24 V DC supply powers the solenoid, and a 100 % duty cycle permits uninterrupted energization. Cold coil resistance of 2 Ω, rising to 3 Ω at peak temperature, defines the current that the drive electronics must provide. The winding can reach 150 °C before its insulation limit, protecting service life in hot manifolds. Wiring is made through a DIN EN 175201-804 connector coded K31, which offers a quick-disconnect interface, and when the socket is fitted the enclosure attains IP65 ingress protection against dust and water jets. NBR seals resist mineral oil swelling to maintain leak-tight performance, and a mass of 8.0 kg affects handling during installation.
The valve is built to size 10, establishing the flow section and matching standard manifold cavities. Its ISO 4401-05-05-0-94 port pattern simplifies mounting on subplates without custom drilling. At a 10 bar pressure differential it delivers a nominal flow of 85 l/min, supplying actuators with moderate volume at low loss. Main working ports withstand 315 bar so the device can operate in high-pressure circuits. Internal return at port T is limited to 30 bar to keep backpressure from hindering spool centering. HL or HLP fluids specified by DIN 51524 are required, ensuring the viscosity and lubrication level expected by the internal clearances.
Technical Specifications
Command Input
±10 V (A1)
Duty Cycle
100%
Electrical Connection
DIN EN 175201-804 (K31)
Hydraulic Fluid
HL/HLP (DIN 51524)
Max Coil Temperature
150 °C
Max Main Port Pressure
315 bar
Max Return Pressure (port T, Internal)
30 bar
Nominal Flow
85 l/min at Δp 10 bar
Port Pattern
ISO 4401-05-05-0-94
Protection Class
IP65 (With Socket)
Seals
NBR (M)
Solenoid Coil Resistance (cold)
2 Ω
Solenoid Coil Resistance (max Hot)
3 Ω
Supply Voltage
24 V DC
Valve Size
10
Weight
8.0 kg
1620 Old Apex Road
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