Model Explanation

D661: Series Code (Integrated Electronics, 24VDC, NG10)

4650: Valve Core/Body Assembly, Rated Flow Rate 75 L/min (ΔP = 35 bar) Technical Specifications

Hydraulic parameters

Rated flow rate: 75 L/min (ΔP = 35 bar)

Maximum working pressure: P/A/B ports 350 bar; internal leakage T port 210 bar, external leakage T port 350 bar (Moog Inc.)

Step response: 7–14 ms (0→100%, 210 bar)

Hysteresis: <0.2%; Resolution: <0.1%; Zero drift (ΔT = 55K): <1.5%

Zero position leakage: <15 mL/min

Electrical parameters

Power supply: 24 VDC (18–32 VDC) Moog Inc.

Control signal: ±10 V or ±10 mA Moog Inc.

Feedback signal: 4–20 mA (valve core position) Moog Inc.

Connection: 6+PE, protection IP65

Physical and environmental

Operating temperature: -40℃ ~ +85℃

Weight: Approximately 5.4 kg

Interface and communication configuration

Hydraulic interface: P/A/B/T four ports, ISO 4401-05 standard Moog Inc.

Electrical interface: Power (24VDC/GND/PE), Command (±10V/±10mA), Feedback (4–20mA), Status alarm Moog Inc. Core function

ServoJet® Jet Pipe Pre-Controller: Strong anti-pollution performance, low drift, long lifespan

Integrated Closed-Loop Amplifier: Built-in PID, hysteresis compensation, overload protection

Valve Core Position Electrical Feedback: Full travel high precision, high linearity Moog Inc.

High Flow and High Dynamics: 75 L/min flow rate, suitable for high-speed and heavy-load closed-loop control

Application Scenarios

Metallurgy: Rolling mill AGC downstroke, main drive tension control (large flow)

Test Equipment: Large vibration table, structural mechanics testing machine

Industrial Automation: Large injection molding machines, hydraulic forming machines, precision heavy machinery

Energy and Heavy Industry: Shield tunneling machine main drive, wind turbine pitch, ship rudder

Installation and Maintenance

Installation: Horizontal / Vertical installation, avoid strong vibration; Oil cleanliness NAS 1638-6 grade and above

Commissioning: 24VDC power supply, connect ±10V/±10mA instructions; Zero and gain adjustment through 4–20mA feedback Moog Inc.

Maintenance: Regularly detect oil contamination degree; Calibrate zero point and gain every 6 months; Avoid long-term standby with high pressure without instructions