• Model: 743F002B (also marked 351A7620P0101)

• Type: Two‑stage electro‑hydraulic servo valve, 4‑way, dual coil

• Manufacturer: MOOG

• Series: 743 (direct‑operated, analog signal, no integrated electronics)

• Application: Industrial, power generation, turbine control, closed‑loop position/velocity/pressure control

• Design: Dry torque motor, dual‑nozzle flapper pilot stage, mechanical feedback

Hydraulic

• Rated Flow: 25 gpm (95 L/min) at Δp = 35 bar (500 psi) per land

• Max Operating Pressure: 210 bar (3,000 psi) (P, A, B ports)

• Fluid: Mineral hydraulic oil (ISO VG 15–68)

• Viscosity: 10–400 mm²/s (optimum 20–50 mm²/s)

• Cleanliness: ISO 4406 17/14/11 or better

• 100% Step Response: 25 ms (at 210 bar)

• Frequency Response: ≥45 Hz (at 90° phase lag)

Electrical

• Input Signal: ±16 to ±60 mA (dual coil, series/parallel)

• Coil Resistance: 80 Ω ±5% (per coil, 20 °C)

• Power Consumption: ≤12 W (peak)

• Insulation Class: Class H (180 °C)

• Connection: Military‑style connector (MS)

Environmental

• Operating Temp: –20 °C to +60 °C (–4 °F to +140 °F)

• Storage Temp: –40 °C to +85 °C (–40 °F to +185 °F)

• Humidity: 5%–95% RH, non‑condensing

• Vibration: 20 g (58–500 Hz)

• Shock: 75 g (11 ms duration)

• Protection: IP54 (standard)

Mechanical

• Mounting: MOOG standard 4‑hole flange

• Weight: ≈1.7–1.8 kg (3.7–4.0 lbs)

• Porting: 4‑port (P, T, A, B)

• Body Material: Steel

Performance

• Linearity: ≤0.5% full scale

• Hysteresis: ≤3% full scale

• Repeatability: ≤0.1% full scale

Compliance & Options

• Certifications: CE, RoHS

• Options: Intrinsically safe, high‑temp coils, magnetic null adjust