Parameter Specification / Description Manufacturer & Model Eaton DG4V-5-22ALJ-M-U-H6-20 Valve Type High-Performance Servo-Proportional Valve with Integrated Digital Electronics & Dual LVDT Feedback Series / Size DG4V-5 (Size 05) Mounting Interface ISO 4401-05 (CETOP 5, NFPA D05) subplate Port Size (Main) Typically 3/4"-16 UNF, 7/8"-14 UNF, or M22x1.5 Actuator / Electronics Code -22ALJ- : 22A = Dual LVDT Feedback (redundant sensing). LJ = Integrated digital electronics controller (enables digital communication & advanced control). Spool Type M – High-performance proportional spool with optimized flow characteristics. Spool Overlap Zero Lap / Servo Lap Electrical Connector -U- : Multi-pin connector for power, digital communication, and possibly analog backup. Commonly includes a CAN bus connector. Coil / Electronics Version -H6- : High-performance electronics package. Command Input Primary: Digital protocols (e.g., CANopen, DeviceNet, Profibus) via integrated controller. Secondary: Analog backup (typically ±10 VDC) may be available. Feedback Output Dual LVDT signals processed internally. Output via digital bus or as processed analog signals. Supply Voltage (for Valve Electronics) Typically +24 VDC. Communication Protocol Likely CANopen (DS-406) for motion control profiles. Maximum Operating Pressure Up to 350 bar (5,000 psi) Rated Flow (ΔP = 35 bar) Approx. 40 - 75 l/min (10.6 - 19.8 US gpm). Must be verified from official flow curves for spool “M”. Frequency Response (-3 dB, 100% signal) Very High, typically ≥ 100 Hz or more for this digital -H6- version. Hysteresis Extremely Low, typically < 0.5% Linearity Typically < ±1.0% Diagnostic Features Built-in diagnostics via digital bus: LVDT health monitoring, coil temperature, spool position error, fault codes. Required Fluid Cleanliness Extreme (NAS 1638 Class 6 / ISO 4406 15/12/10 or better). Non-negotiable for this level of valve. Recommended Fluid High-quality anti-wear hydraulic oil (e.g., HV46) meeting Eaton specs. Fluid Temperature Range -20°C to +80°C (-4°F to +176°F) Weight (Approx.) ~ 5.5 kg (12.1 lbs)