MOOG G771K200 Electro‑Hydraulic Servo Valve

The MOOG G771K200 belongs to G771 series two‑stage nozzle‑flapper electro‑hydraulic servo valve. It converts weak electrical command signals into accurately regulated hydraulic flow output, realizing high‑precision closed‑loop control of position, speed and force for hydraulic actuators.

Adopting mechanical feedback structure with low‑hysteresis and fast dynamic response, this servo valve is compact and anti‑vibration. It serves as critical spare hardware for industrial test benches, metallurgical equipment and high‑end hydraulic motion control system maintenance and retrofitting.

Main Specifications

• Brand: MOOG; Model:G771K200; Type: Two‑Stage Electro‑Hydraulic Servo Valve
• Applicable System: High‑performance closed‑loop hydraulic motion control system
• Max Operating Pressure: 210 bar, standard ISO manifold mounting interface
• Function: Electrical‑to‑hydraulic conversion, precise flow proportional output for actuator control
• Feature: Nozzle‑flapper pilot stage, mechanical feedback, fast step response, compact rugged structure
• Installation: Manifold mounting conforming to ISO 10372‑02‑02‑0‑92 standard
• Operating Environment: Wide temperature range, adapt to industrial vibration conditions
• Certifications: CE, compliant with industrial hydraulic servo control standards

Core Functions

• Receive analog control current signals from external servo amplifier controller unit.
• Torque motor drives nozzle‑flapper pilot stage to generate pressure difference for main spool displacement.
• Main spool outputs proportional hydraulic flow to control hydraulic cylinder and actuator movement.
• Mechanical feedback mechanism ensures high linearity, low hysteresis and stable closed‑loop performance.
• Deliver fast dynamic response for high‑frequency cyclic motion and fatigue test applications.
• Require matched servo amplifier for signal drive and performance calibration during commissioning.

Application Scenarios

• Material fatigue test rigs, hydraulic simulation test benches and metallurgical rolling equipment.
• Precision force & position closed‑loop control for heavy‑duty industrial hydraulic systems.
• Retrofit and spare replacement of legacy MOOG G771 series servo hydraulic control platforms.
• Hydraulic system overhaul, servo loop debugging and faulty servo‑valve replacement projects.
• Spare parts inventory for hydraulic system integrators and engineering contractors.
• Global aftermarket spare supply for technical teams maintaining MOOG high‑performance hydraulic hardware.