Model Code Explanation (D661-4580D)

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

• 4: 4‑way, zero‑lap, linear flow characteristicMoog Inc.

• 58: Rated flow ≈ 150 L/min (Δp = 35 bar per land)

• 0: High‑dynamic response, single LVDT feedback, standard null stability

• D: Command signal = 2–10 VDC (6 V = null), non‑explosion‑proofMoog Inc.

Technical Specifications

Part Number: D661-4580D

Mounting

Control Function

Hydraulic Parameters

• Rated Flow (Δp = 35 bar): 150 L/min (±8%)

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

• Pilot Pressure (X): 21–280 bar (internal P or external X)Moog Inc.

• 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. 6.2–6.5 kg

Electrical Parameters

• Supply: 24 VDC (18–32 VDC), quiescent 250 mA, dynamic ~550 mAMoog Inc.

• Command Signal: 2–10 VDC (6 V = null, 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)Moog Inc.

• Step Response (0→100%): 7–9 ms @ 210 bar (high dynamics for 150 L/min)Moog Inc.

• Hysteresis: <0.25% (closed‑loop)

• Linearity: <±0.30%

• Resolution: <0.05%

Interface & Communication Configuration

• Electrical: 6+PE connector; 24 VDC power, 2–10 V command, 4–20 mA LVDT feedbackMoog Inc.

• Feedback: Single integrated LVDT (full‑stroke closed‑loop, high accuracy)Moog Inc.

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

• Seal Material: NBR (standard) or FKM (optional, high‑temperature)Moog Inc.

Core Functions

1. 150 L/min High Flow: For high‑throughput precision hydraulic systems

2. High‑Dynamic Response: 7–9 ms step response, optimized for 150 L/min

3. 2–10 V Command: Industry‑standard single‑ended voltage signal (6 V = center)Moog Inc.

4. Precision Closed‑Loop Control: LVDT feedback with low hysteresis for accurate positioningMoog Inc.

5. ServoJet® Pilot: Jet‑pipe design reduces energy use and improves contamination resistanceMoog Inc.

Applicable Scenarios

• High‑Flow Precision Forming: Large stamping presses, heavy‑duty injection molding

• Dynamic Test Benches: High‑force vibration tables, aerospace structural testing

• High‑Performance Machinery: Large CNC machine tools, high‑speed forging equipment

• Industrial Automation: Closed‑loop position/velocity control requiring high flow and dynamics

Compatibility & Installation Notes

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

• Upgrade: Drop‑in replacement for lower‑flow D661 models when higher flow is needed

• System Requirements: 24 VDC supply, 2–10 V analog controller, ISO 4401‑05 manifoldMoog Inc.

Usage & Maintenance Instructions

1. Installation: Mount on flat surface (flatness ≤0.02 mm/100 mm; Ra <1 μm) with M6×55/60 bolts (13 Nm, diagonal)Moog Inc.

2. Fluid: ISO VG 32–46, NAS 1638 cleanliness class ≤8

3. Maintenance: Replace internal filter every 5,000 hours; inspect leaks/connectors periodically

4. Precautions: Avoid voltage spikes/reverse polarity; do not open standard (D) models in field