Model Code Explanation (D661-4070)

• D661: Series (ISO 4401‑05, integrated 24 VDC electronics)

• 4: Flow rating code (max high‑flow platform)

• 07: Spool/pressure/performance upgrade base code

• 0: Premium high‑flow, high‑response, enhanced fail‑safe variant

Technical Specifications

Hydraulic

• Nominal Flow (Δp = 35 bar): 250 L/min (±5%) (max flow in D661 line)

• Max Operating Pressure (P/A/B): 350 bar (5,000 psi)Moog Inc.

• Pilot Pressure (X): 21–210 bar (internal P or external X)

• T Port Pressure (Y internal): 210 bar; (Y external): 350 barMoog Inc.

• Fluid: Mineral oil (DIN 51524), viscosity 15–45 mm²/s

• Temperature: Ambient −20°C to +60°C; Fluid −20°C to +80°C

• Weight: Approx. 6.2 kg

Electrical

• Supply: 24 VDC (18–32 VDC), quiescent 250 mA, dynamic 400 mAMoog Inc.

• Command Signal: ±10 V differential (10 kΩ impedance); optional ±10 mAMoog Inc.

• Feedback Signal: 4–20 mA (dual LVDT/hall spool position, ±0.01% FS accuracy)

• Connector: 6+PE (EN 175201‑804), IP65 (connected)Moog Inc.

• Step Response (0→100%): ≤12 ms @ 210 bar (ultra‑high‑speed tuned)

• Hysteresis: <0.15% (closed‑loop)

• Linearity: <±0.2%

• Resolution: <0.08%

Interface & Communication

• Electrical: 6+PE connector; analog ±10 V command, 24 VDC power, 4–20 mA dual feedbackMoog Inc.

• Feedback: Dual redundant LVDT/hall sensor (full‑stroke closed‑loop, enhanced reliability)

• Ports: P, A, B, T; optional external X (pilot) and Y (return)

Key Features

• Ultra‑High‑Flow: 250 L/min nominal for largest D661‑based hydraulic systems

• Dual Redundant Feedback: LVDT + hall sensor for extreme accuracy & fault tolerance

• Enhanced ServoJet® Pilot: Superior contamination resistance, low leakage (<12 ml/min)

• High‑Speed Dynamics: 12 ms step response for fast‑cycling, high‑precision applications

• Premium Fail‑Safe: Spring‑centers on power loss/fault; high‑pressure rated Y port; advanced fault diagnostics

Applications

• High‑flow industrial automation (large stamping presses, heavy CNC)

• Dynamic test benches (hydraulic simulators, high‑cycle fatigue testing)

• Metallurgy (large roll gap, high‑speed tension control, continuous casters)

• Heavy machinery (large injection molding, die‑casting, steel mill equipment)

• Energy (hydraulic power units, turbine control systems)

Compatibility

• Interchangeable with D661 (G/C/A), D662/D663 (ISO 4401‑05)

• Drop‑in upgrade for D633/D634 and lower‑flow D661 models (4051/4055/4059/4060/4061/4069)

• Requires 24 VDC supply, analog controller (±10 V in / 4–20 mA out), ISO 4401‑05 manifold