Bosch Rexroth | 4WSE2EM6-2X20B9ET210K17EV
4WSE2EM6-2X/20B9ET210K17EV
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The 4WSE2EM6-2X/20B9ET210K17EV servo valve belongs to the 4WS Servo Valves series and is manufactured by Bosch Rexroth. It meters hydraulic flow for closed-loop motion control in automation systems. The valve delivers a nominal flow of 20 l/min when the pressure drop across the metering edges is 70 bar and withstands operating pressures up to 210 bar on ports P, A, and B. An internal pilot oil supply and return eliminate the need for external lines. Electrical actuation is achieved through a command value of ±10 V that drives coils rated at 85 Ω. The electronics operate on a ±15 V supply while drawing no more than 150 mA per rail. A negative spool overlap designated E provides fine positioning around the zero point, and dither-optimized hysteresis is kept to 1.5 % or lower to maintain repeatable flow characteristics.
Mounting follows the ISO 4401-03-02-0-05 porting pattern, allowing interchange with standard subplates. Maintaining oil to ISO 4406 (c) 18/16/13 limits abrasive contamination and safeguards the precision edges that meter flow. The electrical interface is provided through a K17 male connector, which, once mated, brings the enclosure rating to IP65 and shields the coils from moisture and dust. All pressure-retaining seals are formed from FKM to tolerate mineral and many synthetic fluids across common temperature ranges. With a mass of 1.1 kg, the valve can be installed directly on compact manifolds without additional brackets. These characteristics align the product with servo loops that demand high repeatability, low leakage at null, and straightforward integration into modular hydraulic systems.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 18/16/13
Coil Resistance
85 Ω
Command Value Input
±10 V
Electrical Connection
K17 Male Connector
Hysteresis (dither-optimized)
≤1.5 %
Ingress Protection
IP65 (with mating connector)
Max Operating Pressure (p,a,b)
210 bar
Nominal Flow (Δp=70 Bar)
20 l/min
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-03-02-0-05
Seal Material
FKM
Spool Overlap
E (Negative)
Supply Current (per Rail)
≤150 mA
Supply Voltage
±15 V
Weight
1.1 kg
1620 Old Apex Road
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