II. Model Meaning (D661-446xC)

D661: Basic series, ISO4401-05, bushing valve core, integrated 24V electronics

4: Large flow platform (400 L/min +)

46: Rated flow code (approximately 460 L/min when Δp = 35 bar)

x: Dynamic / performance position (0–9, the larger the number, the faster the response)

9: High dynamic (step 8–10 ms, bandwidth ≥ 120 Hz)

1/3: Standard dynamic (step 10–14 ms)

C: Standard electronic, zero drift is small and anti-interference is strong

III. Hydraulic Parameters (standard platform values)

Rated flow: 460 L/min ±8% (Δp = 35 bar)

Maximum flow: 500 L/min (double T ports)

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

Pilot pressure X: 21–280 bar (internal supply P / external supply X) (Moog Inc.)

Return oil T: internal Y = 210 bar; external Y = 350 bar (Moog Inc.)

Medium: Mineral hydraulic oil (DIN 51524), nitrile seal

Oil temperature: -20℃ ～ +80℃

Environmental temperature: -20℃ ～ +60℃

Weight: approximately 5.7 kg

IV. Electrical Parameters (standard D661)

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

Static current: ≈230 mA; Dynamic peak: ≈500 mA (Moog Inc.)

Control signal: ±10 V, ±10 mA, 4–20 mA (optional) (Moog Inc.)

Step response (0→100%, 210 bar): 8–14 ms

Bandwidth (−3dB): ≥120 Hz (High dynamic x = 9)

Interface: 6+PE aviation plug (Moog Inc.)

V. Core Features

✅ ServoJet® pilot: anti-pollution, long lifespan, high reliability

✅ Integrated 24V electronics: plug-and-play, reduces wiring

✅ High dynamic: fast step, wide bandwidth, suitable for high-speed closed-loop

✅ Large flow: 460 L/min, meets the requirements of heavy equipment

VI. Common Specific Models (446xC Family)

D661-4469C: High dynamic, step 8–10 ms, bandwidth ≥120 Hz

D661-4461C: Standard dynamic, step 12–14 ms

D661-4463C: Medium dynamic, step 10–12 ms

VII. Applicable Scenarios

Metallurgy: rolling mills, straightening machines, hydraulic lowering

Injection molding / casting: high-speed precision forming machines

Heavy machinery: forging, stamping, composite materials

Marine: deck machinery, steering gear

Test bench: dynamic load, fatigue test