Moog Gas Control Valve 64 K Upgrade Program Extends GE 7FA Gas Turbine Operation by 33 Percent, Equaling 64 K Hours
9 February 2017
The Industrial Group of Moog Inc. has launched the Moog Gas Control 64 K Upgrade for GE 7FA turbines to extend the maintenance interval of gas control equipment on these turbines from the typical 48,000 hours of operation to 64,000 hours of operation. The new 64 K Upgrade Program is a hardware upgrade that offers GE turbine owners the Moog Extended Life Actuator and the Fisher Extended Life EAB Process Valve. Moog’s upgrade is the only solution available today that has the reliability to last the full 64 K hours, eliminating the need for interim planned maintenance.
The 64K Upgrade offers several key enhancements to the gas control hardware. The Moog Extended Life Actuator Upgrade was developed to ensure the product had a long service life even in conditions with varnished, contaminated lube oil. Moog implemented the use of a contacting seal design, harder rod surface with a proprietary aerospace overlay and chrome coating for the cylinder bore. In environments with clean oil, these same enhancements can extend the expected service life. Emerson has introduced an extended life upgrade for their EAB process valves, establishing the same 64K overhaul cycle for both components. The process valve receives an upgraded live-loaded packing and a Stellite™ alloy sleeve in the valve stem travel area.
To complete the 64 K upgrade package, the actuator and process valve are returned to “zero-hour” condition. The actuator receives a Moog factory overhaul and the process valve undergoes a Fisher Encore™ repair performed at our local Emerson IVS repair facility. The integrated assembly overhaul is a 100% OEM repair, performed by trained technicians using genuine parts. This process ensures the turbine’s valves are returned to as-new specifications and operation, resetting the inspection clock to hour zero.
Many GE 7FA turbines are now equipped with Advanced Gas Path (AGP) technology which extends a typical maintenance interval to 64,000 hours. Moog’s upgrade solution of an extended life Moog Actuator and Fisher Process Valve is the only solution available today that has the reliability to last the full 64 K hours, eliminating the need for interim planned maintenance. If a customer has not performed the GE AGP upgrade on their 7FA turbine, they can still achieve substantial savings realized by the extended service intervals due to the long service life of the Actuator/Process Valve Assembly.
“Anyone getting the advanced gas path upgrade on a GE 7FA turbine should upgrade their gas valve assemblies as well,” says Steve Beddick, regional sales manager for the Industrial Group of Moog. “By doing this, you synchronize your major inspection periods, which means you’ll never find yourself trying to overhaul gas valves when you have a much smaller outage window.”
Moog also eliminates any risks during a scheduled outage through its Advanced Exchange Program, which offers a 7FA turbine owner rebuilt gas control valves that arrive prior to the start date of an outage. This enables a team to install and remove the valves in sequence, thereby saving money and time. For more information about the Moog Gas Control 64 K Upgrade for GE 7FA turbines or Advanced Exchange Program, visit www.moogglobalsuppport.
Caption: Extended Life Actuator Components: Upgraded extended life actuator centerline components.
Caption: Typical Moog Gas Valve Assembly
Caption: Fisher 64k Bonnet: Remanufactured process valve bonnet and Stellite™ insert.
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