Bosch Rexroth 4WSE2EM-6 Servo Directional Control Valve

Bosch Rexroth 4WSE2EM-6 Directional Control Servo Valve
Bosch Rexroth 4WSE2EM-6 Electro-Hydraulic Servo Valve
Rexroth 4WSE2EM-6 2-Stage Hydraulic Servo Valve

Description:

The Bosch Rexroth 4WSE2EM-6 is a 2-stage, 4-way directional servo valve (servo directional control valve) in their 4WS(E)2EM series. It is electrically actuated and designed for precise control of hydraulic systems — enabling accurate regulation of position, force, pressure or velocity.

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Key Features of Bosch Rexroth 4WSE2EM-6 Servo Directional Control Valve

Parameter Value / Description
Valve type 2-stage directional servo valve, 4-way (can also be used as 3-way)
Size 6 (NG6)
Porting / Mounting Subplate mounting — porting pattern ISO 4401-03-02-0-05
Maximum operating pressure (hydraulic) 315 bar (some variants)
Typical rated flow (at Δp = 70 bar) For “-6” size: e.g. 2 l/min, 5 l/min etc depending variant.
Weight ~ 1.1 kg for size 6
Control Electrically actuated torque motor (dry), nozzle-flapper amplifier (first stage), control spool (second stage), with mechanical feedback mechanism providing proportional flow control relative to input signal.
Signal type Analog (voltage or current), depending on version of the valve (with external amplifier or integrated electronics)
Ambient / Storage temperature Storage: –20 … +80 °C; Ambient (with OBE / integrated electronics): –20 … +60 °C; without OBE: –30 … +100 °C.
Seal material / Fluid Seals typically FKM, compatible with mineral oil (HL, HLP) per DIN 51524.
Feedback / Return element Mechanical feedback (bending spring / torque tube) ensures spool positions proportionally to electrical command.