Moog G631-3003 Two-Stage Nozzle-Flapper Servo Valve

Product Description

Moog G631-3003 belongs to the G631 series mechanical feedback (MFB) two-stage electro-hydraulic servo valve. It adopts a dry torque motor and double nozzle-flapper pilot stage design, without built-in onboard electronics, requiring an external servo amplifier to drive. This 4-way closed-center spool valve converts analog current signals into proportional hydraulic flow output, featuring low hysteresis, high resolution and compact rugged construction for medium-to-high dynamic closed-loop hydraulic control systems.

Product Functions

• Convert analog current command signal into proportional hydraulic flow output
• Two-stage nozzle-flapper pilot stage with cantilever spring mechanical feedback
• Realize closed-loop position, speed, pressure and force control for hydraulic actuators
• Support optional manual override and null adjustment for on-site calibration
• Replaceable first-stage filter disc for convenient on-site maintenance
• Adapt to continuous working conditions of industrial hydraulic control loops

Applications

• Gas and steam turbine electro-hydraulic governing actuator control
• Material fatigue test benches, vibration simulation test equipment
• Metallurgical rolling mill gap and tension hydraulic control systems
• Aerospace test rigs and high-precision industrial presses
• Oil & gas turbomachinery hydraulic servo control systems

FAQ