4WRPEH10 Rexroth High-Response Valve 315bar

Product Overview:

The 4WRPEH10 series is a direct-acting, high-response proportional directional valve featuring integrated electronics (OBE) and linear variable differential transformer (LVDT) position feedback, built strictly to ISO 4401-05 (NG10 / CETOP 05) standard interfaces. Designed as an exact high-tier aftermarket replacement for original Bosch Rexroth 4WRPEH 10 series valves (including code variants 4WRPEH 10 C3 B100L-30/M/24A1=SA and 4WRPEH 10 C4 B100L-2X/G24K0/A1M), this model ensures 100% drop-in interchangeability without modifying existing mechanical or electrical architecture. Engineered with a ductile iron body and micron-honed sleeve assembly, the valve handles pressures up to 315 bar with ultra-high frequency response and minimal drift. Every valve undergoes 100% full-load condition simulation testing prior to delivery to guarantee uncompromised reliability in closed-loop systems.

Technical Specifications:

• Model Codes: 4WRPEH 10 C3 B100L-30/M/24A1=SA, 4WRPEH 10 C4 B100L-2X/G24K0/A1M (and 4WRPEH10 sub-variants)

• Mounting Interface: ISO 4401-05-04-0-05 (NG10 / CETOP 05)

• Max Operating Pressure (Ports P, A, B): 315 bar (4567 psi)

• Max Permissible Pressure (Port T): 210 bar (up to 315 bar with external drain)

• Nominal Flow Rate (at pressure drop $\Delta p = 35\text{ bar}$ per metering edge): 100 L/min

• Max Operating Flow: Up to 180 L/min

• Control Type & Power Supply: Direct-acting proportional solenoid with integrated OBE (24V DC power, control signal $\pm 10\text{V}$ or $4\text{–}20\text{ mA}$)

• Hysteresis: $< 0.1\%$

• Step Response Time ($0 \to 100\%$): $\le 12\text{ ms}$

• Fluid & Operating Temperature Range: Mineral oil/synthetic ester, -20°C to +80°C

• Weight: Approx. 5.8 kg

Key Technical Advantages:

• 100% Direct Drop-in Interchangeability: Porting patterns, flange dimensions, and 7-pin electrical connections are built to match original Rexroth specifications precisely. Operators can replace worn OEM units instantly with zero piping rework and minimal field setup time.

• LVDT Closed-Loop Precision (< 0.1% Hysteresis): An integrated LVDT transducer continuously tracks the main spool position, feeding real-time positional data into the onboard electronic amplifier (OBE). This maintains hysteresis below 0.1% for precise velocity regulation and micro-positioning.

• Precision Sleeve Assembly & Minimal Internal Leakage: Hardened alloy spools and sleeves are matched using aerospace-grade honing techniques. Extremely tight tolerances minimize cross-port internal leakage at continuous 315 bar pressure, maximizing overall system volumetric efficiency.

• 100% Simulated Full-Load Testing: Every unit is rigorously tested on specialized simulation rigs under peak operational pressure (315 bar), dynamic step response tests, and thermal cycles to ensure zero early-life failure and stable long-term operation.

Application Areas:

• High-precision CNC die-casting and plastic injection molding machines (injection/clamping closed-loop control)

• Metal-forming servo presses and high-frequency stamping machinery

• Turbine governor control systems and electro-hydraulic servo test rigs

• Wind turbine pitch control and hydraulic braking circuits

Expert Maintenance Tips:

• Enforce Strict Oil Cleanliness: High-response proportional valves demand high oil cleanliness. Ensure fluid filtration meets ISO 4406 class 16/14/11 (NAS class 5) or cleaner. Solid contaminants will cause spool edge rounding or binding, leading to system oscillations.

• Shielding & Grounding Integrity: Because the valve utilizes onboard integrated electronics (OBE), always use double-shielded control cables. Ensure proper single-point grounding between the cable shield, valve body, and control cabinet to eliminate electrical noise interference.