Model Code Explanation (D661-4389EG35H0CA5VSX2HA)

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

4: High‑flow platform

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

9: High‑response dynamics (≈7–9 ms step response)

E: Enhanced electronics / null stability

G: Standard zero‑lap spool, linear flow characteristic

35: Pilot pressure rating / flow trim code

H0: Spool configuration & fail‑safe variant

CA5: Feedback & signal option (integrated LVDT, 4–20 mA)Moog Inc.

VSX2: Connector & electrical interface variant

HA: Sealing & temperature range (NBR, −20 °C to +80 °C)Moog Inc.

Technical Specifications

Part Number: D661-4389EG35H0CA5VSX2HA

Mounting: ISO 4401‑05 (NG10), 4‑hole M5, standard T‑port

Control Function: 4‑way/3‑position, spring‑centered, zero‑lap, closed‑loop

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), NBR sealsMoog Inc.

Temperature: Ambient −20 °C to +60 °C; Fluid −20 °C to +80 °CMoog Inc.

Weight: Approx. 5.7 kg

Electrical

Supply: 24 VDC (18–32 VDC), quiescent ≈230 mA, dynamic ≈500 mAMoog Inc.

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

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

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

Step Response (0→100%): ≤7–9 ms @ 210 bar

Hysteresis: <0.25% (closed‑loop)

Linearity: <±0.30%

Resolution: <0.10%

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 High Flow: Suitable for large‑scale hydraulic systems

7–9 ms Fast Response: High dynamics for precision motion control

Integrated LVDT Feedback: 4–20 mA signal enables accurate closed‑loop control and cable break detectionMoog Inc.

ServoJet® Pilot: Low hysteresis, good pressure gain, robust performanceMoog Inc.

Enhanced Null Stability: E‑code electronics reduce drift and improve long‑term accuracy

Applications

High‑speed industrial test benches

Precision forging presses and steel rolling mills

Large injection molding and die‑casting machines

High‑tonnage hydraulic machinery requiring fast response

Closed‑loop systems with position/velocity/pressure control

Compatibility

Interchangeable with D661‑4380E/4384C/4385C (same ISO 4401‑05 footprint)

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

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