Bosch Rexroth | 4WS2EM10-5X75B11ET315K8DV
4WS2EM10-5X/75B11ET315K8DV
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The 4WS2EM10-5X/75B11ET315K8DV servo valve is produced by Bosch Rexroth as part of the 4WS Servo Valves series. It meters hydraulic oil to cylinders and motors for precise motion control in automated machinery. The valve supplies a rated flow of 75 l/min at a 70 bar differential, giving actuators consistent speed under closed-loop regulation. A ±10 % flow tolerance defines the allowable deviation so loop gains remain stable. Maximum operating pressure reaches 315 bar, allowing the unit to sit directly on high-pressure manifolds. Approved media are HL and HLP fluids specified in DIN 51524, ensuring compatibility with standard mineral oils. The mounting face follows ISO 4401-05-05-0-05, which simplifies manifold design and replacement. Pilot supply and return are internal, eliminating external pilot lines and reducing plumbing complexity. An IP65 enclosure guards the coils against dust and low-pressure water jets for dependable service in open plant environments.
Each electromagnetic coil draws 30 mA and presents 85 Ω resistance, letting low-power servo amplifiers drive the spool without overheating. Series inductance of 1.0 H and parallel inductance of 0.25 H limit di/dt and smooth current changes during rapid command shifts. Reliable function is maintained from −30 °C to 100 °C ambient temperature, covering cold starts and elevated machine room heat. System oil must meet ISO 4406 cleanliness class 18/16/13 so the precision spool does not stick. A mechanical return system centers the spool when power is removed, providing a fail-safe neutral position. Overall weight is 3.56 kg, light enough for direct manifold mounting without extra support.
Technical Specifications
Ambient Temp (max, No Obe)
100 °C
Ambient Temp (min, No Obe)
–30 °C
Cleanliness Class
ISO 4406 18/16/13
Coil Resistance
85 Ω
Hydraulic Fluid
HL, HLP (DIN 51524)
Inductance (parallel)
0.25 H
Inductance (series)
1.0 H
Max Operating Pressure
315 bar
Pilot Supply/return
Internal/Internal
Porting Pattern
ISO 4401-05-05-0-05
Protection Class
IP65
Rated Current Per Coil
30 mA
Rated Flow
75 l/min (Δp 70 bar)
Rated Flow Tolerance
±10%
Return System
Mechanical
Weight
3.56 kg
1620 Old Apex Road
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