As a result, over 40 years later, MD&A has evolved from a small firm to a large service provider with over 600 employees reaching more than 100 customers each week during outage season.  The reputation for outstanding service in the US has enabled MD&A to spread globally with parts, repairs, and services on large turbine-generator sets.

Watch our company video!

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View our Houston Service Center Tour Video below and then call MD&A today at (210) 618-8571 or use our Contact form.

Welcome to MD&A’s Houston Service Center in Houston, Texas.

MD&A is a worldwide leader in the repair and testing of gas turbine fuel nozzles. Our experts perform airflow inspections, pressure tests, disassembly, repairs and reassembly.

We are knowledgeable experts for Standard Combustion, Multi-Nozzle Quiet Combustor, Dry Low NOx System 1.0, Dry Low NOx System 2.0 and 2.0 Swozzle, Dry Low NOx System 2.6.

We have overhaul capability on fuel nozzles on GE® Frame 3, Frame 5, Frame 6, Frame 7, & Frame 9.

The first step of our Combustion & Hot Gas Path Components’ process is referred to as strip and inspect.

On incoming inspection, we perform both airflow and dimensional inspections, then strip them with grit blaster booths.

Our experts pinpoint any cracks with a fluorescent penetrant inspection, or a red dye inspection.

The ultrasonic inspection is a completely automated, ultrasonic underwater test that provides thirty-eight points of precise measurement.

The second step is the repair stage for Combustion & Hot Gas Path Components.

MD&A utilizes the industry’s most advanced welding techniques, including hot box and hand blending.

Our shop has individual welding booths assigned to each part. All of MD&A’s crews are certified in their specific area of expertise creating a facility that epitomizes the best in service and value.

Our advanced engineering expertise combined with leading-edge equipment delivers reliable, extended life for all parts.

Our Gas Turbine Parts Service Facility provides repair services for large-frame gas turbines, with proven expertise on frame 7EA, 6FA,7FA, 9FA, V84, and V94 combustion and hot gas path components.

A full-service, OEM-alternative for gas turbine components and repairs, MD&A delivers industry-leading solutions with processes and parts that are backed by guarantees.

That’s power through experience!

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Safe and reliable electric power doesn’t just happen.
It’s created, generated, most often by one of these, joined to one of these. Each has value.
Combined, they are powerful and complex.
When these machines need service and repair, that’s where we come in.
MD&A: Mechanical Dynamics and Analysis.
We bring our expertise, and our team’s commitment to precision to everything we do.
We analyze, we talk.
We rally to find solutions; and we respond.
We help keep the lights on; keep things moving around the globe.
Visit one of our shops. You won’t see assembly lines.
You’ll see the world’s most precise machines,
in the hands of the world’s most resourceful and professional people.
It’s all cutting edge stuff.
Come witness the generation of electric power. You can feel it.
We’re magnetic; energetic!
We talk, we collaborate, we go well above and beyond the norm.
If we see barriers, we step over them.
It’s exciting, fun and incredibly rewarding.
We listen to our customers, and they listen to us.
Embracing bright ideas, we learn every day—we challenge ourselves and vitalize our careers.
Finding answers drives us and we celebrate those successes.
And when we go home safely each day, when we flip the switch,
we know we are part of it all—for us, and for those around us.
Dynamic is not just in our name; it’s in our culture.
It resonates throughout the MD&A workforce.
At MD&A, we truly work together, as one team!
We collaborate, we listen, we innovate.
We put energy behind everything we do!
Explore a Career with a Powerful Purpose.
Sound interesting? We’d like to talk.

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View the video on the advantages of our custom fitting of packing and seals. For additional information call MD&A’s On-site Seal Services today at (518) 399-3616 or use our Contact form.

Why Packing & Seal Installation is So Critical
Turbine seals prevent steam from leaking between the rotating and stationary components. Having excessive clearance due to either component distortion or through seal wear reduces turbine efficiency. Having clearances that are too tight, will result in turbine rubs and operational problems.

Installation of packing rings and seals by experienced turbine technicians is a key part of your outage. Skilled technicians can custom machine your replacement seals to best fit distorted components and establish proper seal clearances. Having the proper tooling and skills enables MD&A to perform this work efficiently and with great precision.

The most common distortions are:

• Elliptical Bore Distortion- Turbine Diaphragms, Blade Rings, and glands cases frequently become elliptical after years of service. This changes seal radial clearances, resulting in seal rubs and subsequent wear and increased seal clearances. Decreased sealing efficiency, decreases turbine efficiency and output. Using the distorted component dimensions, our technicians and Engineers design and manufacture the replacement seals to better accommodate the distortion. Our Seal technicians provide the final adjustment to accommodate the uneven distortion within the component and frequently make radial adjustments to offset minor component misalignment.
• Dishing Distortion of the Diaphragm- The axial relationship between seal teeth and the turbine rotor is critical to a smooth-running and properly sealed turbine. As a turbine ages, the interstage diaphragms/nozzles may creep axially due to differential steam pressures. This axial displacement changes the relationship between the stationary seal teeth and the rotor. If the change becomes too great, the rotor will rub the seal teeth, causing vibration and increased seal clearances. With consideration of “As Found” axial clearances, MD&A can custom make and fit packing to restore seal axial clearances.

CNC-Equipped Containerized Unit
MD&A not only provides precision design engineering of manufactured rings and seals but sends expert technicians with 20 to 30 years of experience in the field for installations and repairs.

Our crews arrive with a fully-equipped mobile containerized machine shop, complete with advanced CNC equipment, printer, computer, high-speed wireless access, and all necessary tools.

See how else MD&A can help you with your Gas & Steam Turbine needs. 

The post Onsite Seal Services Video appeared first on MDA Turbines.

View our video to see the process and then call MD&A today at (518) 399-3616 or use our Contact form.

MD&A’s Gas Turbine Rotor Life Extension Program provides solutions for your aging fleet.

Our goal is to meet your operating strategy for remaining life through validation, repair, or replacement of life limiting components.

MD&A will evaluate your specific needs with input from you, including Operating History & Forecast to provide the best solution.

Our experts will assess your rotor with specialized inspections including Metallurgical Evaluation and perform a Complete Engineering Analysis with modeling.

Next, we will discuss our recommendations and your options, ranging from specific component repairs or replacement, A Rotor Exchange Program or Full Rotor Replacement.

Our Turbine-Generator Repair facility in St. Louis, MO is fully equipped, featuring a Rotor Stacking Elevator with support equipment, Overhead Cranes, Blast Cleaning Facilities, Advanced Rotor Welding, Reverse Engineering Lab and a State-Of-The-Art High Speed Balance Facility.

MD&A is a premier worldwide manufacturer of heavy-frame gas turbine rotor components from replacement turbine wheels & disks to spacers.

Our components are Based on a reverse engineered – never fired – OEM design. Our solutions provide more robust, superior re-engineered components.

MD&A provides power generators around the globe with a full-service, OEM-alternative for your gas turbine. Together, we power through experience!

The post Gas Turbine Rotor Life Extension Video appeared first on MDA Turbines.

In addition, the project included a full test and inspection on field, where MD&A experts rewound, applied a blocking modification, and restored the journals. Following receipt of the upgrades, the field was high-speed balanced with a thermal heat run at MD&A’s high-speed balance facility in St. Louis, MO.

We are your full-service, OEM-alternative!

View our Generator Stator Replacement video below and then call us today at (518) 399-3616 or use our Contact form.

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View our 40th Anniversary video below:

The post MD&A 40TH Anniversary 2022 Video appeared first on MDA Turbines.

View the video on the advantages of the main stop valve upgrade and for additional information call MD&A Parts Division today at (518) 885-3199 or use our Contact form.

Solid Particle Erosion (SPE) occurs where steam and solid particles at high velocities make an abrupt change in direction. SPE reduces component life and decreases valve reliability. A thorough investigation of stem and bypass valve erosion on main stop valves led to an engineering design study of these issues.

The evaluation resulted in the design of MD&A Parts Division Triplet Type Main Stop Valve upgrade as an effective countermeasure to the solid particle erosion seen in conventional designs. The main stop valve upgrade addresses these issues with a configuration that allows for high-velocity bypass steam to flow parallel to the stem, thus eliminating stem erosion issues.

MD&A Parts Division’s Engineering Manager, said:

“The triple bypass main stop valve upgrade significantly reduces solid particle erosion (SPE). The engineering experts at MD&A Parts Division design each valve to optimize the flow geometry and apply the latest materials and nanocoating technology to extend component life. The overall valve offering is a drop in replacement that reduces valve maintenance costs and increases the time between valve outages.”

MD&A Parts Division (MD&A) manufactures and supplies all parts for Triplet Type Bypass Main Stop Valve. MD&A’s Turbine-Generator Repair Facility in St. Louis performs the final valve assembly.

Advantages of Triplet Type Bypass Main Stop Valve:

• MD&A Triplet poppet valve geometry, contoured to gradually turn the steam flow parallel to stem
• Proprietary TiSiCN nanocoating applied to poppets for improved SPE resistance
• Flared conical diffuser shape of the bypass holes reduce particle velocity and improve direction
• Stellite shielded pressure seal head improves SPE resistance on forward facing steps
• Reduced valve maintenance
• Applicable to subcritical and supercritical plant applications
• 30+ Years of replacement experience (175 MW to 700 MW)
• 8” to 15” Valves

MD&A Parts Division (MD&A) manufactures and supplies all parts for Patented Triplet Type Bypass Main Stop Valve. MD&A’s Turbine-Generator Repair Facility in St. Louis performs the final valve assembly.

The post Triplet Type Main Stop Valve Upgrade appeared first on MDA Turbines.

View our Steam Turbine Capabilities Video below and then call MD&A today at (314) 880-3000 or use our Contact form.

MD&A’s Steam Turbine Repair experts make repair recommendations based upon the owner’s intended operating plans for the unit and can help extend the life of your aging fleet.

We maintain a staff of experienced full-time steampath engineers who specialize in the engineered repair of stationary and rotating components.

Our engineers strictly follow effective, time-tested principles that produce sound and superior repair solutions.

We approach challenges with the experiences gained from hundreds of successful projects.

Our offerings include a complete array of steam turbine component repair services, backed by the experience of factory-trained engineers.

We work on various manufacturers and address historic design flaws that incorporate upgraded materials.

Our Parts Division is a premier worldwide supplier of replacement steam turbine parts and components.

We offer upgraded steam turbine parts solutions for addressing reliability and capacity demands.

MD&A’s Steam Turbine Services provides clients with the labor, engineering, and technical experts necessary to address both planned and forced outages.

We are your full-service, OEM-alternative!

Call our Steam Turbine Experts today. Together, we power through experience!

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