II. Model Meaning (D661-4450C - Estimated)

D661: Series (ISO4401-05, 24V integrated electronics, sleeve-type valve core)

4: Large flow platform

45: Estimated rated flow rate 450 L/min (Δp = 35 bar)

0: Estimated medium-high dynamic (step response approximately 10–12 ms)

C: High-stability electronics, strong zero position performance, small temperature drift

G (Implicit): Standard zero covering valve core, linear flow characteristic

III. Technical Parameters (Estimated, same as platform standard values)

Hydraulic parameters

Rated flow (Δp = 35 bar): 450 L/min (±8%)

Maximum working pressure (P/A/B): 350 bar (5000 psi) Moog Inc.

Pilot pressure X: 21–280 bar (internal supply P or external supply X)

Return oil T pressure: Internal Y: 210 bar; External Y: 350 bar Moog Inc.

Working medium: Mineral hydraulic oil (DIN 51524), nitrile rubber seal

Oil temperature range: -20℃ ～ +80℃

Environmental temperature: -20℃ ～ +60℃

Weight: Approximately 5.7 kg Electrical parameters

Power Supply: 24 VDC (18–32 VDC), static ≈ 230 mA, dynamic ≈ 500 mA. Moog Inc.

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

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

Connector: 6+PE (EN 175201-804), IP65 (connection status). Moog Inc.

Step Response (0→100%): ≤ 10–12 ms @ 210 bar. Moog Inc.

Hysteresis: < 0.25% (closed loop). Moog Inc.

Linearity: < ±0.30%. Moog Inc.

Resolution: < 0.10%. Moog Inc.

IV. Interfaces and Communications

Electrical Interface: 6+PE aviation connector; ±10V command, 24V power supply, optional 4–20mA valve core feedback. Moog Inc.

Feedback: Built-in LVDT full travel closed loop (optional). Moog Inc.

Oil Ports: P, A, B, T; optional external control X (leading), Y (return oil)

V. Core Features

450 L/min Maximum Flow Rate: Top flow rate of D661-05 platform

10–12 ms Balanced Response: Balances large flow rate and dynamics

C-Type High-Stability Electronics: Zero position stable, small temperature drift, strong anti-interference

ServoJet® Jet Pipe Pilot: Low hysteresis, high pressure gain, long-term reliability. Moog Inc.

±10V Standard Analog Interface: Compatible with mainstream PLC / controllers

VI. Typical Applications

Super Large Hydraulic Forging / Extrusion Presses

Heavy Injection Molding / Casting / Hydraulic Machines

Metallurgical Rolling Mills, Large Industrial Test Bases

High Flow Closed Loop Position / Speed / Pressure Control Systems

VII. Interchangeability and Compatibility

Installation Dimensions: ISO4401-05 (NG10), fully interchangeable with D661-4436C/4439C/4443C/4444C. Moog Inc.

Power Supply and Control: Same platform standard, 24VDC + ±10V can drive. Moog Inc.