Topless Alignment®

Topless Alignment® Services eliminates the time-consuming and expensive process of reassembling the turbine for “Tops-On” measurements, saving hundreds of man-hours and labor per turbine section. Most centerline alignment activities are moved off the critical path, reducing outage duration by days. No “Tops-On” readings are needed.
How is Topless Alignment® Performed?

  • MD&A takes measurements immediately after rotors are removed, during slack time, while the stationary components are waiting for rotors to be blast cleaned.
  • Using custom laser and measurement equipment, MD&A measures turbine shell deflections and centerline bore positions.
  • Ideal steampath bore positions are then calculated and recommended moves are made as a non-critical activity.
  • The final alignment is verified and corrected if necessary after component inspection and repairs are completed.

Why Choose the “Topless Alignment®” Method?

  • Stationary component alignment is done off the critical path
  • Increased Safety! A 50% reduction in heavy rigging of upper half-shells and casings (No Tops-On measurements)
  • Bearing shim changes and pad contact checks done off the critical path
  • Improved turbine efficiency
  • Customer-focused
  • When combined with the new Guardian® packing from MD&A, the packing can be custom machined to compensate for out-of-round bores, further improving efficiency
  • Over 1450 Successful Alignments
  • Eliminates Tops-On Tops-Off Requirement
  • Reduces Labor Man-Hours
  • Reduces Outage Duration

Check this case study out:

Topless Turbine Laser Alignment   Steam Turbine Major Inspection and Repair in the Philippines

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