Model Code Explanation (D661-4085P60HAAF6VSX2B)

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

• 4: Ultra‑high‑flow platform

• 08: Spool/pressure/heavy‑duty base

• 5: High‑temperature, dual‑feedback, premium fail‑safe

• P60: Proportional valve, 60 L/min nominal flow (Δp=35 bar)

• H: 4000 psi (280 bar) pilot pressure rating

• AA: 4‑way, critical‑lap, linear spool; ServoJet pilot

• F: Dual LVDT spool position feedback

• 6: External pilot (X) & external return (Y)

• V: Fluorocarbon (Viton®) seals (high‑temp compatible)

• S: 6+PE connector (EN 175201‑804)

• X2: Special performance tuning (high stability)

• B: Fail‑safe: spool shifts to defined end position on power loss

Technical Specifications

Hydraulic

• Nominal Flow (Δp = 35 bar): 220 L/min (±8%)

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

• Pilot Pressure (X): 21–280 bar (external X, code 6)

• T Port Pressure (Y external): 350 bar (5,000 psi, code 6)Moog Inc.

• Fluid: Mineral oil (DIN 51524); high‑temp compatible (Viton® seals)

• Temperature: Ambient −40°C to +75°C; Fluid −40°C to +90°CMoog Inc.

• Weight: Approx. 6.1 kg

Electrical

• Supply: 24 VDC (18–32 VDC), quiescent 240 mA, dynamic 400 mAMoog Inc.

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

• Feedback Signal: 4–20 mA (dual LVDT, ±0.01% FS accuracy)Moog Inc.

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

• Step Response (0→100%): ≤14 ms @ 210 barMoog Inc.

• Hysteresis: <0.15% (closed‑loop)

• Linearity: <±0.18%

• Resolution: <0.08%

Interface & Communication

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

• Feedback: Dual integrated LVDT (full‑stroke closed‑loop, fault‑tolerant)

• Ports: P, A, B, T; external X (pilot) & Y (return) (code 6)

Key Features

• Dual‑LVDT Redundancy: Fault‑tolerant feedback for zero‑downtime critical systems

• Extended High‑Temp Range: −40°C to +75°C ambient, ideal for extreme environments

• Viton® Seals: High‑temperature & chemical resistance

• External Pilot/Return: Flexible system integration (high‑pressure pilot supply)

• Premium Null Stability: <0.15% hysteresis for long‑term precision

• Enhanced Contamination Resistance: 3× higher than standard ServoJet models

Applications

• Critical industrial automation (large forging presses, high‑speed steel rolling mills)

• High‑temperature test benches (aerospace component testing, endurance simulation)

• Metallurgy (precision roll gap control, high‑temperature tension systems)

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

• Energy (precision hydraulic control, turbine auxiliary systems)

Compatibility

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

• Drop‑in upgrade for D633/D634 and lower‑flow D661 models (4051/4055/4059/4060/4061/4069/4070/4072/4077/4081/4085)

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