Bosch Rexroth | 4WS2EM10-5X45B11ET315K8DV
4WS2EM10-5X/45B11ET315K8DV
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The 4WS2EM10-5X/45B11ET315K8DV servo valve belongs to the 4WS Servo Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation. It fits size 10 manifolds and delivers a rated flow of 45 l/min at a 70 bar pressure drop, enabling accurate metering in medium-flow circuits. The main stage withstands a maximum operating pressure of 315 bar, while the pilot stage is also limited to 315 bar to match system pressure capability. An internal pilot oil supply identified by the ET code removes the need for an external pilot line and simplifies installation. The valve is driven by a current-controlled actuating signal; its magnetic coil takes a rated current of 30 mA, presents a resistance of 85 Ω, and shows inductances of 0.25 H in parallel connection and 1.0 H in series connection, values that define the electrical dynamic behavior. A mechanical return system re-centers the spool when the control signal is removed and maintains symmetry between flow paths.
For interface and service considerations, the valve uses the porting pattern ISO 4401-05-05-0-05 so it mounts directly to standard subplates. An IP65 protection class prevents dust ingress and low-pressure water jets from affecting the coil housing during field operation. The required fluid cleanliness is ISO 4406 18/16/13, a level that limits particulate wear in the precision spool and bushings. FKM seals tolerate common hydraulic oils at elevated temperatures and maintain leak integrity over long duty cycles. Total mass is 3.56 kg, facilitating manual installation without lifting equipment.
Technical Specifications
Actuating Signal
Current-Controlled
Coil Rated Current
30 mA
Coil Resistance
85 Ω
Fluid Cleanliness Class
ISO 4406 18/16/13
Inductance (parallel)
0.25 H
Inductance (series)
1.0 H
Maximum Operating Pressure
315 bar
Pilot Oil Supply
Internal (ET)
Pilot Stage Max Pressure
315 bar
Porting Pattern
ISO 4401-05-05-0-05
Protection Class
IP65
Rated Flow
45 l/min (Δp 70 bar)
Return System
Mechanical
Seal Material
FKM
Size
10
Weight
3.56 kg
1620 Old Apex Road
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