Bosch Rexroth | 4WS2EM10-5X90BOT210K31CV-112
4WS2EM10-5X/90BOT210K31CV-112
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The 4WS2EM10-5X/90BOT210K31CV-112 belongs to the 4WS Servo Valves series manufactured by Bosch Rexroth for closed-loop hydraulic automation. It is a size 10 unit that meters flow to cylinders and motors with a two-stage design that amplifies pilot forces into precise spool movement. The valve handles a rated flow of 90 l/min, giving stable performance in medium-capacity circuits. Each electromagnetic actuator draws a rated current of 30 mA; this value matches a coil resistance of 85 Ω so heat generation remains low. A parallel inductance of 0.25 H moderates current rise, preventing overshoot in high-speed control loops. Electrical connection is through an EN 175201-804 (K31) interface, and the wiring is completed with the R900223890 mating connector. A housing sealed to IP65 blocks dust and splash water, maintaining reliable operation on mobile or industrial machinery.
The valve withstands continuous system pressures up to 315 bar, allowing it to drive actuators that demand high force without loss of accuracy. It mounts on subplates machined to the ISO 4401-05-05-0-05 pattern and is secured with ISO 4762-M6×70-10.9 screws to ensure correct bolt stretch. Circuit fluid must meet cleanliness class ISO 4406 18/16/13 so that spool clearances stay free of contamination. FKM seals isolate the hydraulic passages, providing chemical resistance and temperature capacity suited to modern mineral and synthetic oils. When the two coils are wired in series, an inductance of 1.0 H smooths the current waveform for finer position control during low-speed commands. The complete assembly weighs 3.56 kg, light enough for a single technician to fit during equipment maintenance.
Technical Specifications
Cleanliness Class
ISO 4406 18/16/13
Coil Resistance
85 Ω
Design
2-Stage
Electrical Connection
EN 175201-804 (K31)
Inductance (parallel)
0.25 H
Inductance (series)
1.0 H
Mating Connector
R900223890
Max Operating Pressure
315 bar
Mounting Pattern
ISO 4401-05-05-0-05
Mounting Screw
ISO 4762-M6x70-10.9
Protection Class
IP65
Rated Current Per Coil
30 mA
Rated Flow
90 l/min
Seals
FKM
Valve Size
10
Valve Weight
3.56 kg
1620 Old Apex Road
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