Field Proven Upgrades for GE Aeroderivative and Heavy Duty Turbines

For all GE (General Electric) heavy-duty and aero-derivative turbine models, WOC is your go-to supplier for retrofit Mark IV, Mark V, Mark VI, and Mark VIe control systems. To reduce outage time and commissioning risk, our systems are offered as “drop-in” retrofits for the original systems. They have been field tested on hundreds of GE turbines, ranging from early 1960s Frame 5 units to the most recent F-class units. GE Gas Turbine Solutions as follows:


Ovation is a popularly utilized modern alternative to the outdated SpeedtronicTM Mark IV, Mark V, and Mark VI systems on 7001/9001 E and F class gas turbines. In order to regulate GE gas turbines, the Ovation system for these units is a fully functional replacement system with redundant controllers and redundant I/O. Options include integrated excitation, SIL3-rated protection, automated tuning for DLN units, and combustion dynamic monitoring.



WOC offers Woodward (Netcon5000, Micronet, Atlas) and Speedtronic Mark V, Mark VI LM control system replacements and related improvements for GE LM aero-derivative systems. Our solution provides dependable, adaptable control of LM units and has been field tested on LM units. For increased dependability and performance, options include upgrading the GT fuel metering valves and integrating Balance of Plant (BOP) controls.

FRAME 3/5/6:

WOC has a lengthy history of updating earlier ‘Frame’ gas turbines, including Frame 5, 6B, and 7B units’ Speedtronic Mark I, II, IV, and V control systems. We provide a variety of upgrade solutions for instruments, valves, and auxiliary systems in addition to the most modern, high-performance control and protection systems, all of which are intended to enhance the performance and dependability of these older components.


WOC is a global aftermarket supplier of high-quality OEM and non-OEM replacement spare parts and services for the General Electric™ heavy-duty, industrial gas turbines. Through our worldwide network, we are able to offer clients a wide range of products for the GE™ designed MS3002, MS5002, MS5001, MS6001, MS7001, and MS9001 gas turbines. Our goal at Gas Turbine Parts & Services, Inc. is to offer owners and operators of these gas turbines an experienced, reliable, and competitive source for all of their gas turbine needs.

Our Mission is to provide you with the parts, repairs, and services you need when you need them. WOC is a full-service provider of heavy-duty & aero-derivative industrial gas turbine maintenance, including spare parts distribution, component repairs, and field services.

WOC holds a large inventory of New, Used, and Refurbished Capital Spares that are available for immediate shipment. More details and inspections of these parts can be provided and arranged upon request.

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