Model Explanation

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

4649: Valve Core/Body Assembly, ServoJet® Pilot, Rated Flow 45 L/min (ΔP = 35 bar) Technical Specifications

Hydraulic parameters

Rated flow rate: 45 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: 6.5–12 ms (0→100%, 210 bar)

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

Zero position leakage: <10 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 Moog Inc.

Physical and environmental

Working temperature: -40℃ ~ +85℃

Weight: Approximately 5.2 kg

Interface and communication configuration

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

Electrical interface: power supply (24VDC/GND/PE), instruction (±10V/±10mA), feedback (4–20mA), status alarm Moog Inc. Core function

ServoJet® Jet Pipe Precedent: 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 Dynamic Response: Millisecond response, suitable for high-speed closed-loop control

Application Scenarios

Metallurgy: Rolling mill tension control, small AGC downstroke

Test Equipment: Material testing machine, fatigue test bench (medium-low flow)

Industrial Automation: Precision machine tools, injection molding machines, hydraulic forming machines

Energy and Heavy Industry: Wind turbine pitch control, shield tunneling machine auxiliary control

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

Commissioning: 24VDC power supply, connect ±10V/±10mA instructions; Adjust zero point and gain 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