Valves Repair

Repair and overhaul recommendations have been developed for Woodward valves, actuators, mechanical controls and auxiliary products utilizing reliability and operational data collected from field performance.

A detailed analysis has compared repair records of returned units, field data and design criteria to determine the following recommendations. An overhaul of the component should be completed on or before the unit reaches the recommended range of “Operating Hours” not to exceed 6 years in service. Recommendations are appropriately aligned with the standard OEM turbine maintenance schedules which are based on “normal” operating conditions, environment, fuel quality, and past maintenance history. Installations that do not meet “normal” operating conditions may require customized maintenance cycles to maximize reliability, performance and asset life. Contact us for a detailed evaluation of your site conditions to determine the right maintenance cycles for your installation.

 
Product Name Maintenance Recommendation
Operating Hours* Years in Service
AERO DERIVATIVE:
Hydraulic Control Unit 50,000 Hours 6 years
Variable Geometry Hydromechanical Control 50,000 Hours 6 years
Variable Geometry Electromechanical Control 50,000 Hours 6 years
Variable Stator Vane Actuators 50,000 Hours 6 years
1907 Small Liquid Valves 25,000 Hours 3 years
1907 Large Liquid Valves 50,000 Hours 6 years
Liquid Shutoff Valves 50,000 Hours 6 years
LQ25 & LQ25T Liquid Metering Valves 50,000 Hours 6 years
1907 Small Gas Valves 25,000 Hours 3 years
3103/3171 Gas Valve with Hydraulic Actuator 50,000 Hours 6 years
3103/3171 Gas Valve with Electric Actuator 50,000 Hours 6 years
Gas Shutoff Valve 50,000 Hours 6 years
GS3/GS10 Gas Metering Valve 25,000 Hours 6 years
GS6/GS16 Gas Metering Valve 50,000 Hours 6 years
3151 Water Metering Valve 50,000 Hours** 6 years**
CIT/CDP Sensor 50,000 Hours 6 years
2057 Pump 50,000 Hours 6 years
Electric Gas Metering Valve (EGMV) on LMS100 50,000 Hours*** 6 years***
Electric Water Metering Valve (EWMV) on LMS100 50,000 Hours*** 6 years***
Electric Liquid Metering Valve (EMLV) on LMS100 50,000 Hours*** 6 years***
Variable Bleed Vane (VBV) on LMS100 50,000 Hours 6 Years
HEAVY FRAME:
Globe Gas Fuel Control Valve (Hydraulic and Electric Actuated) 50,000 Hours*** 6 years***
SonicFlo Gas Fuel Control Valve (Hydraulic and Electric Actuated) 50,000 Hours*** 6 years***
Rotary Fuel Control Valve (Hydraulic, Electric, Pneumatic Actuated) 50,000 Hours*** 6 years***
3-Way Liquid Fuel Control Valve (Hydraulic Actuated) 50,000 Hours 6 years
2 - Way Liquid Fuel  Valve (Hydraulic and Electric Actuated) 50,000 Hours*** 6 years***
2 – Way Water Metering Valve (Hydraulic and Electric Actuated) 50,000 Hours*** 6 years***
Inlet Guide Vane (IGV)  Actuator 50,000 Hours 6 years
Variable Guide Vane (VGV) 50,000 Hours 6 years

*Woodward considers its valves and actuators as key components in the overall fuel efficiency, emissions control and safety of the gas turbine.  Therefore, we recommend that our products be overhauled at the same regular intervals that the gas turbine “Hot Section” or “Major Inspections” occur.  Please consult the Gas Turbine OEM guidelines for recommended service intervals for your turbine.

** Per the product manual guidance complete sleeve indexing maintenance procedure as recommended. Manual 40120 “3151A Water Valve/TM-40LP Actuator Assembly for Gas Turbine Water Injection System” Manual 40181 “3151A Water Valve EML100 Actuator Assembly for Gas Turbine Water Injection System”

*** Per the product manual guidance for electric actuation, complete re-greasing maintenance procedure at recommended intervals. Contact your local Woodward distributor for re-greasing kits.

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