We are AP4
Expert support for legacy power assets
Proudly providing market leading technical expertise, reliable parts distribution and commercially sound solutions for accelerated performance and peace of mind.
Our capabilities
Turbine, control and excitation parts and services to keep your power plant operational no matter what.
Find out moreControls Solutions
Specializing in control system solutions and services to keep your power plant operational.
Turbine Services
Expert controls, electrical, and rotating equipment services for the Alstom fleet. 30+ years of experience with Alstom® and ABB® equipment.
Parts and Repair
Fast, reliable distribution and managed repair services for ancillary gas turbine parts, including fuel system, hydraulic, and control system components, and more.
Installation Services
Expert led gas turbine centerline installation and commissioning services for new build power plants, delivering safe, precise, and reliable execution.
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Gas Turbine Auxiliary and Consumable Parts
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Control System Parts
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GE Controls Parts
Why AP4?
Expert support for legacy power assets
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Expert-led assurance
Our engineers and support teams bring decades of hands-on experience, many OEM-trained, and all deeply committed to solving your toughest turbine, controls, and excitation challenges.
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Fast, focused response
When the pressure’s on, we’re already moving. Our clients get direct access to decision-makers, an extensive parts inventory, and same-day action in emergencies.
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Value-driven continuity
We help you extend asset life, reduce risk and stay ahead without overspending.
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Trusted, tailored delivery
Our solution-focused teams cut through complexity, identifying problems fast and delivering the right parts and solutions without delay.
Equipment we serve
Trusted by leading partners across the globe
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Want to accelerate your performance? Let’s chat.
Our experts are on hand to work with you to solve your operational challenges.
