SERVICE BEYOND EXPECTATIONSMECHANICAL DYNAMICS & ANALYSIS

MD&A Bearings, Seals & Hydraulics Division has been supporting customers in the area of bearings, oil seals, and hydraulic component refurbishments for over three decades.

We were founded on a �rm foundation of turbine-generator maintenance technical competency. This competency and the constructive input of loyal customers provide the basis for insightful questions and answers which ultimately de�ne a customized level of SERVICE BEYOND EXPECTATIONS.

Our greatest expertise resides in our ability to refurbish complex bearing and seal assemblies, utilizing a process that greatly reduces the time typically required for �eld �tting and alignment.

MD&A is committed to serving the needs of combined cycle plants owners. We inventory a large selection of RR hydraulic servos, solenoids, rebuild kits and disc springs to support a short cycle overhaul of EHC valve actuators.

MD&A offers short cycle turnaround for customers who encounter emergencies and need components repaired and returned as soon as possible. Call MD&A at any time,day or night, at 800-446-4776.

MECHANICAL DYNAMICS & ANALYSIS

WE OFFER COMPLETE REFURBISHMENTOF THE FOLLOWING:

FIXED BORE JOURNAL BEARINGS• Centrifugal casting• Spherical Ball-Ring mounting restoration• Insulated mounting ring restoration• Instrumentation upgrades

TILT PAD JOURNAL BEARINGS• Complete assembly (support discs, alignment pad)

reconditioning• Predictable alignment techniques

TAPERED LAND THRUST BEARINGS• Specialized �xtures / techniques for consistent pro�les• Filler shims

TILT PAD THRUST BEARING• Complete assembly (leveling links, base rings, pivot

buttons) reconditioning• Predictable bump check shim sizing

TAPERED LAND THRUST BEARINGSTroubleshooting the source of differential thrust bearing temperatures can be frustrating and costly especially if load reduction action is required. MD&A has earned the trust of many customers todesign, manufacture and repair tapered land thrust bearings since 1984.

GAS TURBINE BEARINGSGas turbines utilize optimized bearing designs with advanced features and speci�cations. MD&Ahas worked closely with gas turbine customers to jointly develop inspection and repair proceduresto assure a smooth installation and long term reliability.

SPHERICAL MOUNTING RESTORATIONThe list of potential conditions contributing to unstable vibration trends can be endless. MD&Ahas helped many customers eliminate the variable of bearing mounting mechanical loosenessby performing complete restoration of the spherical ball – ring �t.

BEARINGS

WE OFFER COMPLETE REFURBISHMENT AND UPGRADES TO THE FOLLOWING:• MHC Operating Governor / Optional Speed-Load

Changer Upgrade

• Full Arc Start-Up Controller / Optional Upgrade

• Mechanical Overspeed Governor / Control Rotor

• Steam Seal Regulator

• Vacuum Trip Mechanism

• Master Trip Valve

• MHC Power Actuator / Optional Control Valve Cam & Crosshead Upgrade

• RR Hydraulic Actuator / Disc Spring

• Diagnostic Monitoring Instrumentation

MD&A MAINTAINS AN INVENTORY OF SPECIALIZED BELLOWS, GEARS, PILOT VALVES, DISC SPRINGS, RR HYDRAULIC SERVOS, SOFT SEALS AND PISTON RINGS TO ASSURE A TIME CRITICAL TURNAROUND WHEN REQUIRED.

Central load dispatch centers and modern DCS plant controls have placed new demands on turbine governor response. DROOP and DEADBAND have a signi�cant impact on your turbine generators ability to respond quickly to revenue opportunities due to spot power market �uctuations.

A functional bench test veri�cation of all hydraulic control components repaired at MD&A greatly reduces the need for �eld adjustment during start up and is considered a cost effective form of risk management by many owners.

HYDRAULIC CONTROLCOMPONENTS

WE OFFER MANUFACTURING AND REFURBISHMENT OF THE FOLLOWING:• Hydrogen Seals

• Oil De�ectors

• Bearing Seals

• MOP Seals

• Helix Seals

• Water Seals

MD&A MAINTAINS AN INVENTORY OF CUSTOM BRONZE ALLOYS, SEAL TOOTH MATERIAL, GARTER SPRINGS, INSULATION COMPONENTS AND BODY BOLTSTO ASSURE A TIME CRITICAL TURNAROUND WHEN REQUIRED.

Loyal repeat MD&A customers have expressed the need to shorten outage durations and reduce overall outage costs. In response MD&A has developed a level of service designed to substantially reduce the manpower traditionally associated with the �eld �tting of critical seal assemblies.

Since 1984 MD&A has designed, manufactured, retro�tted and repaired seals rings to correct operational issues such as excessive oil �ow, excessive hydrogen consumption, and electrolysis.

SEAL RINGS

MECHANICAL DYNAMICS & ANALYSIS1250 East 222nd Street

Euclid, Ohio 44117

Ph: (800) 446-4776

Fx: +1 (216) 383-4878

Email: info@mdaturbines.com

www.mdaturbines.com