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Bosch Rexroth | FESX-40-CA-1X500LZ4M

FESX 40 CA-1X/500LZ4M

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The FESX 40 CA-1X/500LZ4M throttle valve belongs to the FES Throttle Valves series from Bosch Rexroth and meters hydraulic flow in automated circuits. Its nominal size is 40, providing a cavity capacity compatible with large-volume lines. It installs in a DIN 24342 (ISO 7368) cavity, allowing direct replacement with other standardized slip-in cartridges. The main ports a, b, and x accept working pressures up to 315 bar, while port y is limited to 100 bar to protect the drain channel. To initiate controlled flow from a to b, the supply must reach at least 12 bar. The cartridge passes a nominal flow of 500 l/min at a 5 bar differential and can handle up to 1500 l/min when fully opened, supporting high-demand actuators. A pilot supply of 28 l/min at the same differential ensures responsive spool movement under dynamic load changes.


The valve weighs 7.1 kg, so a single technician can handle installation without lifting equipment. The solenoid draws a maximum current of 2.7 A, and the coil shows 2.5 Ω at 20 °C, defining the electrical load seen by the drive stage. Maximum power consumption is limited to 40 VA, which helps size power supplies in multi-axis systems. The integrated LVDT provides a ±10 V output, allowing the controller to read the spool position directly. Closed-loop accuracy is supported by a positioning tolerance of 0.5 % and hysteresis not exceeding 0.2 %, enabling precise metering in proportional control loops. The enclosure carries an IP65 rating so the assembly resists dust ingress and low-pressure water jets in exposed machinery.

Technical Specifications

Coil Resistance (20 °c)
2.5 Ω

Degree Of Protection
IP65

Hysteresis (max)
0.2%

Max Power Consumption
40 VA

Max Working Pressure (a,b,x)
315 bar

Max Working Pressure (y)
100 bar

Maximum Flow Qmax
1500 l/min

Min Supply Pressure (a→b)
12 bar

Mounting Configuration
DIN 24342 (ISO 7368)

Nominal Flow (Δp 5 Bar)
500 l/min

Nominal Size
40

Pilot Supply Flow (Δp 5 Bar)
28 l/min

Positioning Accuracy (max)
0.5%

Solenoid Max Current
2.7 A

Transducer Output Signal
±10 V

Weight
7.1 kg

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