Model Code Explanation (D661-4072)

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

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

• 07: Spool/pressure/ruggedization base code

• 2: Industrial harsh‑duty, standard fail‑safe, enhanced contamination resistance

Technical Specifications

Hydraulic

• Nominal Flow (Δp = 35 bar): 220 L/min (±10%)

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

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

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

• Fluid: Mineral oil (DIN 51524), viscosity 15–45 mm²/s; high‑contamination toleranceMoog Inc.

• Temperature: Ambient −20°C to +65°C; Fluid −20°C to +85°C (extended range)

• Weight: Approx. 6.1 kg

Electrical

• Supply: 24 VDC (18–32 VDC), quiescent 230 mA, dynamic 390 mAMoog Inc.

• Command Signal: ±10 V differential (10 kΩ impedance)Moog Inc.

• Feedback Signal: 4–20 mA (single LVDT spool position, ±0.02% FS accuracy)Moog Inc.

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

• Step Response (0→100%): ≤15 ms @ 210 bar (ruggedized tuning for stability)

• Hysteresis: <0.2% (closed‑loop)Moog Inc.

• Linearity: <±0.25%Moog Inc.

• Resolution: <0.1%Moog Inc.

Interface & Communication

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

• Feedback: Single integrated LVDT (full‑stroke closed‑loop, fault‑monitoring capable)Moog Inc.

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

Key Features

• Harsh‑Duty ServoJet®: Enhanced filtration, 3× higher contamination resistance than standard modelsMoog Inc.

• High‑Flow & Stable Response: 220 L/min nominal, 15 ms step response for dirty industrial fluidsMoog Inc.

• Ruggedized Electronics: Conformal coating, extended temp range, vibration‑hardened componentsMoog Inc.

• Low Null Leakage: <14 ml/min, energy‑efficient for continuous‑run systemsMoog Inc.

• Standard Fail‑Safe: Spring‑centers on power loss/fault; high‑pressure Y port ratingMoog Inc.

Applications

• Heavy industrial automation (foundry presses, steel mill roll stands)

• High‑contamination test benches (industrial simulators, endurance testing)

• Metallurgy (roughing mill gap control, high‑temperature tension systems)

• Heavy machinery (mining equipment, large forging presses, waste compactors)

Compatibility

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

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

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