Bosch Rexroth | 4WSE2EM10-5X20B9ET315K31EV
4WSE2EM10-5X/20B9ET315K31EV
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The 4WSE2EM10-5X/20B9ET315K31EV servo valve is produced by Bosch Rexroth for the 4WS Servo Valves series and meters hydraulic flow for closed-loop automation tasks. It is built in size 10 and installs on manifolds with an ISO 4401-05-05-0-05 interface to standardize port alignment. During operation the valve delivers a rated flow of 20 l/min at the metering lands, while the housing sustains system pressures up to 315 bar without external relief devices. The electronic section is powered by a ±15 V supply and reacts to a ±10 V command signal, enabling symmetric spool positioning around zero. A coil resistance of 85 Ω and a rated coil current of 30 mA define the drive magnet’s electrical load and ensure compatibility with typical valve controllers. For wiring, the unit uses an EN 175201-804 plug coded K31, allowing quick disconnection during maintenance.
Pilot oil is taken from the inlet gallery and returned internally, so no external pilot lines are required for the Internal/Internal configuration identified by code ET. The valve is filled with HL or HLP hydraulic fluids according to DIN 51524, and it must receive oil filtered to ISO 4406 class 18/16/13 to protect the precision spool. An IP65 protection class guards the enclosure against dust ingress and low-pressure water jets when the specified connector is fitted. Dynamic spool centering uses a mechanical return system designated by the letter M, while all static seals are made of FKM to tolerate mineral oils and elevated temperatures. The assembly weighs 3.56 kg, permitting single-person handling during installation or replacement.
Technical Specifications
Cleanliness Class
ISO 4406 18/16/13
Coil Resistance
85 Ω
Command Value Signal
±10 V (Code 9)
Electrical Connection
EN 175201-804 (K31)
Hydraulic Fluid
HL, HLP (DIN 51524)
Mounting Interface
ISO 4401-05-05-0-05
Pilot Oil Supply/return
Internal/Internal (ET)
Pressure Rating
315 bar
Protection Class
IP65
Rated Coil Current
30 mA
Rated Flow
20 l/min
Return System
Mechanical (M)
Seal Material
FKM
Size
10
Supply Voltage
±15 V
Weight
3.56 kg
1620 Old Apex Road
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