Model Code Explanation (D661-4380E)

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

4: High‑flow platform

38: 380 L/min nominal flow (Δp=35 bar)

0: Standard dynamic response (slowest in 4xxx series)

E: Economy electronics, basic null‑stability trim

Technical Specifications

Part Number: D661-4380E

Mounting: ISO 4401‑05 (NG10), 4‑hole, M5 screws (torque 8 Nm)

Control Function: 4‑way/3‑position, spring‑centered, zero‑lap, closed‑loopMoog Inc.

Hydraulic

Nominal Flow (Δp=35 bar): 380 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. 5.8–6.0 kg

Electrical

Supply: 24 VDC (18–32 VDC), quiescent 230 mA, dynamic ~500 mA

Command Signal: ±10 V differential (10 kΩ impedance)

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

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

Step Response (0→100%): ≤15 ms @ 210 barMoog Inc.

Hysteresis: <0.30% (closed‑loop)Moog Inc.

Linearity: <±0.35%Moog Inc.

Resolution: <0.12%Moog Inc.

Interface & Communication

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

Feedback: Single integrated LVDT (full‑stroke closed‑loop)Moog Inc.

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

Key Features

380 L/min Maximum Flow: Highest flow in D661‑4xxx series

15 ms Standard Response: “0” code delivers cost‑effective dynamicsMoog Inc.

350 bar Heavy‑Duty Pressure: Suitable for harsh industrial environmentsMoog Inc.

Economy Null Stability (“E”): Lower cost for non‑critical precision applicationsMoog Inc.

Voltage Command: ±10 V input, wide controller compatibility

Applications

Ultra‑high‑flow industrial test benches (non‑aerospace)

Large forging presses and heavy steel rolling mills

General‑purpose metallurgical roll gap control (high flow)

Extra‑large injection molding and die‑casting machines

Mining excavators and high‑tonnage hydraulic machinery

Compatibility

Interchangeable with D661‑4375B/4352C/4341C (ISO 4401‑05)

Drop‑in upgrade for lower‑flow D661‑4209/4196

Requires 24 VDC supply, ±10 V controller, ISO 4401‑05 manifold