REXROTH 109‑0743‑3B04‑03

Technical Specifications

• Valve Configuration: 4/3‑way directional spool valve
• Max Operating Pressure: 350 bar
• Nominal Maximum Flow Rate: 80 L/min
• Solenoid Coil Supply Voltage: 24 VDC
• Coil Power Consumption: 25 W
• Mounting Style: Sub‑plate mounting, standard ISO‑mounting pattern
• Port Connection Size: G 3/4″
• Operating Fluid: Mineral‑based hydraulic oil per DIN 51524
• Fluid‑Temperature Range: ‑30 °C ~ +80 °C
• Weight: 2.8 kg Function Features
• Precision‑machined valve spool‑sleeve assembly for low internal leakage
• DC solenoid actuation with reliable electromagnetic spool shifting
• Robust industrial construction for heavy‑cycle continuous‑operation duty
• Standard ISO sub‑plate interface supporting quick valve replacement without pipe disassembly
• Integrated coil surge‑suppression for protection against inductive electrical transients
• Application Scenarios: General‑purpose industrial hydraulic machinery; material‑handling equipment; machine‑tool hydraulic‑actuator control; press‑machinery hydraulic‑circuit direction‑switching; mobile industrial‑machinery hydraulic‑systems.
• Performance Parameters: Spool‑switching response time <70 ms; internal leakage dependent on operating pressure; suitable for continuous cyclic duty‑cycle operation.
• Material Composition: High‑strength cast‑valve‑body steel alloy; precision‑ground hardened‑steel spool and sleeve components; copper‑wound electromagnetic solenoid coils; nitrile‑rubber sealing‑element assemblies.
• Structural Characteristics: Sub‑plate‑mount monoblock valve‑body; dual‑end‑mounted solenoid actuators; port‑connection passages integrated inside valve‑body casting; standard‑pattern mounting‑foot.
• Working Principle: Electrical 24 VDC energisation of one solenoid generates electromagnetic‑force displacing precision‑ground spool inside sleeve; spool‑land passages re‑route hydraulic‑oil flow‑paths to reverse hydraulic‑actuator movement direction; de‑energised solenoid allows internal return springs to centre spool to neutral‑position flow configuration.
• Installation Requirements: Mount onto flat rigid ISO‑standard sub‑plate; apply specified tightening‑torque to mounting bolts; ensure hydraulic‑oil cleanliness conforms to Rexroth‑recommended fluid‑filtration‑class; solenoid electrical‑wiring must respect voltage polarity for DC coils.