Description

Product Overview

The G771K203A belongs to Moog G771 turbine‑grade servo valve family, widely adopted for GE / GE Vernova steam & gas turbine control systems (Mark V / Mark VI / Mark VIe). It converts analog electrical command signal into precisely regulated hydraulic flow to actuate steam inlet valves, fuel valves, bypass and extraction valves. It features a high‑gain pilot stage, low null drift and excellent repeatability under turbine lube‑oil service conditions. This variant is a common drop‑in spare for power generation packages.

Technical Specifications

• Brand: Moog
• Model: G771K203A
• Warranty: One Year
• Condition: 100% New & Original
• Valve Type: Two‑stage, pilot operated, flow‑control servo
• Input Signal: ±10 mA analog coil command
• Hydraulic Medium: Turbine lube oil / fire‑resistant fluid
• Supply Pressure: 21 MPa typical turbine servo oil supply
• Null Adjustment: Factory calibrated; adjustable null bias
• Mounting: Standard manifold subplate mounting, turbine control skid
• Response: High bandwidth for fast valve position regulation
• Application: Gas turbine fuel control, steam turbine governor / stop / control valve actuation
• Differentiation within family:
  • G771K200A / G771K201A / G771K202A / G771K203A / G771K208: different flow rating and porting
  • G772K240A: higher‑flow sister variant
• Origin: USA
• Certifications: CE
• Lifecycle: Active aftermarket spare; many units still in service on GE turbine fleets