Flow Range: 23 to 18,144 kg/h (50 to 40,000 lb/h)

Inlet Pressure: Up to 6,206 kPa (900 psia)

Differential Pressure: 172 to 6,206 kPa (25 to 900 psi)

Fuel Temperature: –40 to +149 °C (–40 to +300 °F)

Actuator Operating Temperature: –40 to +121 °C (–40 to +250 °F)

Hydraulic Supply Pressure: 2,758 to 6,895 kPa (400 to 1,000 psi)

Angular Stroke: Max 45°

Stall Torque: 38 N·m at 2,758 kPa; 95 N·m at 6,895 kPa

Time Constant: 0.025 s

Input Signal: 20 to 200 mA

Metering Accuracy: ±5% of point or ±0.25% of maximum flow

Working Principle: Electronic control current drives a torque‑motor servo valve, which directs hydraulic oil to a servo piston that rotates the metering sleeve, regulating fuel flow. Mechanical feedback maintains proportional positioning.

Installation Requirements: Hydraulic cleanliness ISO 4406 20/18/15; supply filtration 10 μm; fuel‑gas inlet filtration per particle‑size specification; any orientation allowed provided maintenance access is ensured.

Precautions: Periodically verify hydraulic oil contamination grade; replace clogged filters promptly; calibration data must match the physical serial number; automatic valve closure on loss of pressure is normal fail‑safe behavior.