4WRLE10W-Z80SJ-3X/G24K0/A1M Rexroth Proportional Valve 350bar

Product Overview

The 4WRLE10W-Z80SJ-3X/G24K0/A1M is a Bosch Rexroth 4WRLE series pilot-operated proportional directional control valve (covering sizes NG10/16/25/27/35) featuring electrical position feedback and integrated on-board electronics (OBE). It incorporates spool symbol W (approx. 20% positive overlap), load tap (Z), rated flow of 80 l/min with progressive characteristic (SJ), component series 3X, 24 V supply, K0 electrical connection, and A1M interface (±10 V command signal, NBR seals). Fully compliant with ISO 4401 subplate mounting, the valve offers complete interchangeability with original Rexroth units without any modifications to piping or control systems. Every unit undergoes 100% simulated operating condition testing to ensure reliability in high-pressure, high-precision closed-loop applications. Ideal for industrial hydraulic systems requiring accurate position, velocity, and pressure control.

Technical Specifications 

• Model: 4WRLE10W-Z80SJ-3X/G24K0/A1M (series covers NG10/16/25/27/35)
• Nominal size: NG10 (primary; series supports larger sizes)
• Control spool symbol: W (approx. 20% positive overlap with electronic compensation)
• Additional feature: Z (with load taps C1/C2)
• Rated flow (Δp = 10 bar valve pressure difference / 5 bar per control edge): 80 l/min
• Maximum operating pressure (ports A, B, P – external pilot): 350 bar
• Maximum pressure with internal pilot (ports A, B, P): approx. 280 bar
• Port X max. pressure: approx. 280 bar; ports T/Y max. pressure: approx. 250 bar
• Minimum pilot pressure: approx. 10 bar
• Control: Pilot-operated proportional with OBE and electrical position feedback; command signal ±10 V (A1); supply 24 VDC (G24); electrical connection K0 (without connector, order separately)
• Flow characteristic: S (progressive) + J (overlap compensation)
• Component series: 3X
• Seal material: NBR (M)
• Hysteresis: <0.1%
• Response sensitivity: <0.05%
• Weight: approx. 8.7–9 kg (NG10)
• Mounting: Subplate, ISO 4401-05
• Hydraulic fluid temperature range: –20…+70 °C
• Recommended viscosity: 20…100 mm²/s
• Fluid cleanliness: ISO 4406 class 18/16/13

Key Technical Advantages

• Servo-quality precision manufacturing: Pilot stage spool and sleeve produced to servo standards; main stage features high-precision lapping. Positive-overlap design with electronic compensation delivers minimal internal leakage and high volumetric efficiency.
• Outstanding dynamics and low hysteresis: Hysteresis below 0.1% and response sensitivity under 0.05%, combined with closed-loop position feedback, enable rapid and accurate flow/direction switching for high-frequency position or velocity control.
• Integrated OBE with factory calibration: On-board electronics are factory-calibrated, accept ±10 V analog commands, simplify system integration, and provide fail-safe spool positioning on power loss.
• Robust construction and extended service life: High-strength housing with optimized seals and bearings withstands high pressure and vibration; 100% simulated duty-cycle testing further enhances reliability and longevity.

Application Areas

Injection molding machines, die-casting machines, metallurgical equipment, heavy-duty presses, marine steering systems, mobile equipment main control valves, large test stands, and any industrial hydraulic system requiring high-precision closed-loop position, velocity, or pressure control. Especially suitable for OEM equipment and retrofit projects demanding interchangeability and superior dynamic performance.

Expert Maintenance Tips

Verify subplate flatness and cleanliness before installation; tighten mounting bolts to the specified torque to prevent body distortion. Maintain hydraulic fluid cleanliness to ISO 4406 18/16/13 and use high-efficiency filtration. Before initial power-up, check electrical connections and proper shielding/grounding to ensure stable command signals. Periodically inspect pilot oil filters and seals to prevent contamination-induced sticking. When replacing, select a fully interchangeable unit of the same specification and perform unloaded position calibration to restore control accuracy.