Rexroth 4WE Series Directional Solenoid Valve 4WE6 4WE10 R900548271

The premium 4WE Series Directional Solenoid Valves (comprising mainstream industry-proven designations 4WE10D5X/EG12N9K4/M, 4WE6Y31/CG24N9K4, 4WE6E60/EW110N9K4, and the orifice-restricted 4WE6J62/EG24N9K4/B10 matching Bosch Rexroth catalog number R900548271), engineered by Chengyuan Hydraulic, represent high-performance fluid power routing elements designed for 100% direct drop-in interchangeability within global B2B industrial circuits, manifold setups, and hydraulic power units. Manufactured in strict mechanical alignment with Bosch Rexroth 4WE6 (Series 6X/60/31) and 4WE10 (Series 5X) application manuals, this product line features identical subplate mounting footprints (Nominal Sizes NG6/CETOP 3 and NG10/CETOP 5), fastening bolt locations, and standard electrical pin layouts. Maintenance teams can execute instant on-site component swap-outs with zero modifications to legacy electrical panels or hydraulic piping manifolds.

Functioning as the highly responsive control heart tracking and directing fluid paths to cylinders, actuators, and motors, the 4WE series leverages high-efficiency wet-pin AC/DC solenoid configurations. At Chengyuan, zero compromise is tolerated; every single directional valve completing production must successfully clear our 100% rigorous dynamic simulation test bench criteria. Subjected to full continuous workload pressures up to 315 bar, each valve is thoroughly evaluated for thermal coil resistance across long duty cycles, millisecond spool shifting latency (Response Time), fluid-borne transient shock mitigation at full delivery cutoff, and structural cross-port leakage. This guarantees stable switching logic and zero performance degradation under severe high-duty industrial environments.

Technical Specifications

• Product Series Classification: 4WE Series Direct/Pilot-Operated Directional Solenoid Valve

• Nominal Interface Sizing (Porting): Nominal Size 6 (NG6 / CETOP 03); Nominal Size 10 (NG10 / CETOP 05)

• Maximum Continuous Operating Pressure (Ports A/B/P): 315 bar (31.5 MPa)

• Maximum Permissible Tank Line Back-Pressure (Port T): DC Solenoids (EG24/EG12/CG24): Up to 210 bar; AC Solenoids (EW110): Up to 160 bar

• Recommended Fluid Cleanliness Class: Premium anti-wear mineral-based hydraulic fluid matching ISO 4406 20/18/15 minimum thresholds

• Model-Specific Nomenclature & Engineering Metrics (Catalog Verified):

  • Part Designation: 4WE10D5X/EG12N9K4/M (or typical 24V DC configurations)

  • Nominal Interface Size: NG10 / CETOP 5 subplate standard

  • Spool Functional Logic D: 2-position, 4-way, spring-return layout

  • Technical Generation: Series 5X (Interchangeable across all 50-to-59 product editions)

  • Drive Type EG12N9: 12V DC high-power wet-pin solenoid (G indicates DC voltage; N9 denotes integrated manual emergency override pin)

  • Electrical Connector K4: Standard square junction box socket matching DIN EN 175301-803 Form A

  • Maximum Throughput Flow Rate: Up to 120 L/min

  • Net Weight: Approx 4.80 kg

  • Part Designation: 4WE6Y31/CG24N9K4

  • Nominal Interface Size: NG6 / CETOP 3 subplate standard

  • Spool Functional Logic Y: 3-position, 4-way; center position routes ports A and B to tank (T) while closing supply port P (Engineered for actuator float or motor coasting logic)

  • Technical Generation: Series 31 (Optimized low-clearance generation, backward compatible with standard 6X matrices)

  • Drive Type CG24N9: 24V DC heavy-duty wet-armature plug-in solenoid (C indicates detachable coil structure)

  • Maximum Throughput Flow Rate: Up to 80 L/min

  • Net Weight: Approx 1.95 kg

  • Part Designation: 4WE6E60/EW110N9K4

  • Nominal Interface Size: NG6 / CETOP 3 subplate standard

  • Spool Functional Logic E: 3-position, 4-way; all ports (P, A, B, T) completely closed at center position (Standard position locking layout)

  • Technical Generation: Series 60 (Fully interchangeable across all 60-to-69 legacy editions)

  • Drive Type EW110N9: 110V AC heavy-duty solenoid coil (W indicates alternating current, 50/60 Hz universal application)

  • Maximum Throughput Flow Rate: 60 L/min to 80 L/min depending on system pressure drop

  • Net Weight: Approx 1.95 kg

  • Part Designation: 4WE6J62/EG24N9K4/B10 (Rexroth Reference Part Number: R900548271)

  • Nominal Interface Size: NG6 / CETOP 3 subplate standard

  • Spool Functional Logic J: 3-position, 4-way; center position links supply port P directly to tank (T) while closing cylinder ports A and B (Pump unloading machine layout)

  • Technical Generation: Series 62 specialized flow-path cavitation-suppression iteration

  • Drive Type EG24N9: 24V DC high-performance wet-pin solenoid setup

  • Special Hardware Suffix B10: Incorporates a factory-installed $\phi 1.0\,\text{mm}$ restrictive throttle orifice within supply port P. Specifically engineered to curb peak delivery volume, eliminating hydraulic line resonance and pressure waves during fast shifting intervals

  • Net Weight: Approx 2.10 kg

Key Technical Advantages

• CFD-Optimized Low-Resistance 5-Chamber Casting Enclosure: The primary valve housing is cast as a single piece from high-grade ductile iron featuring a reinforced 5-chamber matrix. Internal flow contours are processed via advanced shell-molding sand casting to extract micro-burrs, dropping local operational pressure loss ($\Delta p$) by over 12% to suppress fluid temperature spikes and cavitation erosion under maximum throughput.

• Micron-Precision Lapped & Hardened Shaved Control Spools: The internal sliding spool components are machined from premium structural alloy steel, case-hardened to $\ge HRC\,58$, and ground on high-precision multi-axis CNC outer diameter grinders. Single-side radial clearances between the spool land and the valve bore are maintained between 3 to 5 microns, limiting shifting hysteresis beneath $\le 1\%$ and ensuring low cross-port leakage under 315 bar.

• Wet-Armature Core Architecture for Suppressed Shifting Vibration: Features an advanced wet-pin solenoid configuration where the central armature pin operates fully submerged within the hydraulic oil circuit. This oil bath provides natural viscous dampening that buffers the mechanical steel-on-steel impact during shifting cycles, minimizing plant-floor acoustic noise and enhancing push-rod fatigue resistance.

• Factory-Calibrated Throttle Orifices & High-Insulation Coils: Variants configured with the B10 suffix embed high-hardness, wear-resistant throttle inserts that accurately govern shifting flow rates to prevent lines from catching pressure spikes. Solenoid coil assemblies are encased in a high-dielectric structural polymer matrix (IP65 rated) to completely block moisture entry and withstand thermal spikes during continuous 24-hour duty cycles.

Application Areas

The 4WE series directional solenoid valves, celebrated for their compact footprint, extensive spool mapping variations, and high pressure handling limits, are widely integrated across automated fluid control systems:

• Precision CNC Machine Tools & Metal Forming Equipment: Workpiece clamping circuits, automated tool-changing logic blocks, and secondary manifold routing for industrial bending presses.

• Plastic Injection Molding & Automated Die-Casting Lines: Core-pulling logic control blocks, component ejection sequencing, and secondary safety interlocks for vulcanizing presses.

• Heavy-Duty Metallurgical Infrastructure & Power Stations: Central lubrication routing blocks for hot/cold steel rolling mills, primary pilot stage directional control for large piston pump manifolds, and accumulator unloading power packs.

Expert Maintenance Tips

• Enforce Symmetrical Diagonal Torque Limits During Installation: When bolting an NG6 or NG10 valve onto its manifold interface, always employ a calibrated torque wrench to tighten the four Class 12.9 high-tensile fasteners in a cross-sequence. Unbalanced or excessive torque deforms the precision internal valve bore at a micron level, leading to erratic spool shifting or spontaneous spool sticking.

• Govern Electrical Voltage Fluctuations and Coil Thermal Exposure: Ensure that the input electrical current supplied to DC (EG24/EG12) or AC (EW110) solenoid terminals stays within $\pm 5\%$ of nominal specifications. Under continuous high-frequency cycling configurations, provide sufficient ambient airflow around the coil blocks. Never wedge or tape down the manual emergency override pin (N9) for extended periods, as this will trigger thermal breakdown and coil burnout.

• Verify Orifice Alignment and Cleaning Integrity for Restrictive Variants: When replacing specialized units like the 4WE6J62/EG24N9K4/B10, inspect supply port P to confirm the throttle insert is fully seated and free of mechanical contaminants. Because J-spool logic dumps port P directly to tank at center position, missing the B10 ($\phi 1.0\,\text{mm}$) orifice allows unrestricted fluid dumping, which can trigger intense pipe whipping, resonance noise, or a drop in main system line pressure.