Servo Valve For External Electronics (Rexroth - BOSCH). - 20 L/min , Valve Pressure Differential = 70 bar. - T - External Supply , Internal Drain. - Two Stage , Type 4WS2E. - Nominal Size 10. - Connection Location to ISO 4401. - Code : 4401-03-02-094.

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Servo Valve For External Electronics (Rexroth - BOSCH). - 20 L/min , Valve Pressure Differential = 70 bar. - T - External Supply , Internal Drain. - Two Stage , Type 4WS2E. - Nominal Size 10. - Connection Location to ISO 4401. - Code : 4401-03-02-094.
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4WS2EM_10-5X-20B11T_
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Modified on: August 22,2026  
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Specifications
Supplier part number: 4WS2EM_10-5X-20B11T_
Name:Servo Valve For External Electronics (Rexroth - BOSCH). - 20 L/min , Valve Pressure Differential = 70 bar. - T - External Supply , Internal Drain. - Two Stage , Type 4WS2E. - Nominal Size 10. - Connection Location to ISO 4401. - Code : 4401-03-02-094.
Description:The Bosch Rexroth 4WS2E servo valve is a two-stage directional valve for closed-loop control applications . It is operated by external electronics (servo amplifier), which is ordered separately . The 20 L/min nominal flow rate is a standard option for the NG10 size when measured at a 70 bar valve pressure differential (35 bar per control edge) . The valve conforms to the ISO 4401 porting pattern . ✅ Technical Specifications Parameter Specification Source(s) Model Series 4WS2E (Two-stage servo valve for external electronics) Nominal Size 10 (NG10) Nominal Flow (at 70 bar Δp) 20 L/min (±10% tolerance) Max. Operating Pressure 315 bar Pilot Oil Supply/Drain T – External supply, internal drain Porting Pattern ISO 4401 🔧 Ordering Code Breakdown Your specifications translate into the following Rexroth ordering code structure, as detailed in the manufacturer's datasheet : 4WS2E: Electrically operated 2-stage servo valve for external control electronics . 10: Nominal size 10 (NG10) . 5X: Component series 50 to 59 (installation dimensions unchanged) . 20: Nominal flow: 20 L/min at 70 bar valve pressure differential . B: Valve version code (e.g., spool overlap) . 11: Coil number for external electronics (30 mA / 85 Ω per coil) . T: Pilot oil supply: external supply, internal drain . 315: Inlet pressure range to 1st stage: 10 to 315 bar . K31: Electrical connection code (without plug-in connector, with component plug) . Important Note: The nominal flow of 20 L/min applies at the specified 70 bar valve pressure differential. A ±10% tolerance on this flow value is typical for this series .
    
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