Model Code Explanation (D661-4341C)

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

4: High‑flow platform

34: 340 L/min nominal flow (Δp=35 bar)

1: Ultra‑high dynamic response (fastest in D661‑4xxx)

C: Standard electronics, high‑null‑stability trim

Technical Specifications

Part Number: D661-4341C

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

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

Hydraulic

Nominal Flow (Δp=35 bar): 340 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/sMoog Inc.

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

Weight: Approx. 5.8–6.0 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 (single LVDT, ±0.02% FS accuracy)

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

Step Response (0→100%): ≤6.5 ms @ 210 bar (fastest in 4xxx series)Moog Inc.

Hysteresis: <0.15% (closed‑loop)Moog Inc.

Linearity: <±0.20%

Resolution: <0.05%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)

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

Key Features

340 L/min Ultra‑High Flow: Top flow in D661‑4xxx series

Fastest 6.5 ms Response: “1” code delivers maximum dynamics (faster than 4334C/4332C)Moog Inc.

350 bar High Pressure: Heavy‑duty rating for industrial systemsMoog Inc.

High Null Stability (“C”): Low null shift for long‑term precision

Voltage Command: ±10 V input, standard controller compatibilityMoog Inc.

Applications

High‑flow, ultra‑dynamic test benches (aerospace, defense)

High‑speed forging presses and steel rolling mills

Ultra‑precision metallurgical roll gap control

Large high‑speed injection molding machines

Mining excavators and high‑tonnage hydraulic machinery

Compatibility

Interchangeable with D661‑4334C/4332C/431D‑5/4313C/4303E (ISO 4401‑05)

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

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