Model Code Explanation (D661-4586E)

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

• 4: 4‑way, zero‑lap, linear flow characteristic

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

• 6: High‑dynamic response, single LVDT feedback, enhanced null stability

• E: Command signal = ±10 VDC (differential), non‑explosion‑proof

Technical Specifications

Part Number: D661-4586E

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)

• 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. 6.3–6.6 kg

Electrical Parameters

• Supply: 24 VDC (18–32 VDC), quiescent 260 mA, dynamic ~580 mAMoog Inc.

• Command Signal: ±10 VDC (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)Moog Inc.

• Step Response (0→100%): 6.5–7.5 ms @ 210 bar (high dynamics for 150 L/min)

• Hysteresis: <0.22% (closed‑loop)

• Linearity: <±0.28%

• Resolution: <0.05%

Interface & Communication Configuration

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

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

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

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

Core Functions

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

2. Enhanced Dynamic Response: 6.5–7.5 ms step response, faster than standard 150 L/min models

3. ±10 V Differential Command: High‑noise‑immunity signal for industrial environments

4. Premium Closed‑Loop Control: Tight LVDT feedback with ultra‑low hysteresis

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

Applicable Scenarios

• Heavy‑Duty Metal Forming: Large stamping presses, heavy injection molding, forging equipment

• High‑Force Dynamic Testing: Aerospace structural testing, high‑capacity vibration tables

• Large‑Scale CNC Machinery: Ultra‑precision large machine tools, high‑speed press brakes

• Metallurgical Industry: Steel mill rolling mills, continuous casting systems

Compatibility & Installation Notes

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

• Upgrade: Drop‑in replacement for D661‑4580D when faster response is needed

• System Requirements: 24 VDC supply, ±10 V differential analog controller, ISO 4401‑05 manifold

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)

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 (E) models in field