Turbomachinery & Dynamic Balancing

Power Generation & Turbine Overhauling

Turnkey overhaul, high-speed dynamic balancing up to 15,000 RPM, and precision alignment for steam turbines and industrial power generators.

Turbomachinery Capabilities

Customized engineering solutions to enhance thermal efficiency, extend equipment life, and eliminate unscheduled outages.

Major Overhauling & Repair

Comprehensive disassembly, inspection, re-blading, rotor alignment, and casing restoration for back-pressure, condensing, and extraction steam turbines.

  • Dynamic rotor balancing (Low & High speed)
  • Labyrinth seal & carbon ring replacement
  • White metal journal bearing re-babbitting
  • Casing parting plane blue matching & skimming

DEHC & Digital Governors

Converting outdated mechanical governors to high-precision Digital Electro-Hydraulic Control (DEHC) systems for improved frequency response and grid stability.

  • Redundant PLC/DCS speed control systems
  • Electronic 2-out-of-3 overspeed trip logic
  • Hydraulic actuator & servo-valve retrofits
  • Automated startup & ramp rate management

CHP & Co-Gen Optimization

Engineering integrated Combined Heat and Power (CHP) cycles for sugar, chemical, paper, and textile plants to maximize steam utilization and lower power bills.

  • Back-pressure to process steam balance
  • Waste heat recovery boiler (HRSG) integration
  • High-pressure steam piping design & stress analysis
  • Thermal cycle efficiency audits

Generator & Exciter Servicing

Maintenance, wedge inspection, rewind services, and Automatic Voltage Regulator (AVR) upgrades for high-voltage industrial generators.

  • Stator & rotor insulation testing (Tan Delta, IR)
  • Brushless excitation system overhaul
  • Digital AVR tuning & protection calibration
  • ELCID core tightness and defect testing

Vibration & Health Audits

Advanced diagnostic analysis, FFT spectral vibration profiling, dynamic laser shaft alignment, and thermal imaging during operational conditions.

  • Transient vibration analysis during coast-down
  • Laser shaft and train alignment to < 0.02mm
  • Bearing temperature and oil analysis
  • Borescope internal blade inspection

Valves & Auxiliaries Maintenance

Overhauling Main Stop Valves (MSV), Control Valves (CV), Extraction Non-Return Valves (NRV), lube oil skids, and surface condensers.

  • MSV/CV spindle grinding and seat lapping
  • Hydraulic trip cylinder re-conditioning
  • Condenser re-tubing and hydrotesting
  • Oil flushing & NAS class 6 filtration
Precision Turnaround Execution

Turbine Maintenance Methodology

Every major overhaul follows rigorous OEM-compliant procedures to ensure maximum safety and zero startup delays.

01

Pre-Outage Health Audit

Baseline vibration recording, thermal efficiency logging, and spare parts readiness verification prior to shutdown.

02

Disassembly & NDT

Top casing removal, rotor extraction, dimension checks, and non-destructive testing (MPI/UT) on blades and journals.

03

Refurbishment & Alignment

Dynamic balancing, seal replacement, valve seat lapping, and precision internal laser alignment of diaphragms.

04

Commissioning & Testing

Oil flushing, solo turbine run, overspeed trip calibration, sync with grid, and full load heat rate logging.

Turbine Technical Parameters & Standards

Overview of steam turbine categories, parameters, and ASME/API standards followed.

OEM Compliant Procedures
Turbine Class Power Rating Inlet Pressure / Temp Applicable Standards Target Application
Back Pressure Turbines 0.5 MW – 50 MW Up to 110 Bar / 535°C API 611 / API 612 / ASME PTC 6 Sugar Mills, Paper, Process Heating
Condensing Turbines 5.0 MW – 150 MW Up to 140 Bar / 540°C ISO 10816 (Vibration) / IEC 60045 Captive Power Plants, IPPs
Extraction Condensing 10 MW – 400 MW Up to 160 Bar / 560°C ASME TDP-1 / API 670 (Protection) Fertilizer, Petrochemical Complexes
DEHC Control Systems All Turbine Ratings Hydraulic Pressure 10–160 Bar IEC 61508 (SIL 3 Safety Logic) Digital Speed & Load Governors

Power Project Highlights

A selection of high-stakes turbomachinery overhauls executed within critical shutdown windows.

Sugar & Co-Gen Sector

35MW Extraction Turbine Overhaul

Completed complete rotor extraction, 3rd stage re-blading, journal bearing re-babbitting, and DEHC recalibration during seasonal crushing outage.

Shutdown Duration: 14 Days Vibration < 1.2 mm/s
Chemical & Fertilizer

60MW Steam Turbine DEHC Retrofit

Replaced aging mechanical flyball governor with redundant SIL-3 digital electro-hydraulic control system, reducing speed deviation to < 0.05%.

System: Redundant PLC Zero Trip Failure
Independent Power Producer

120MW Condensing Turbine Turnaround

Executed HP/IP casing parting plane alignment, labyrinth seal overhaul, dynamic rotor balancing, and main stop valve lapping under emergency conditions.

Executed in: 21 Days +3.2% Efficiency

Power Generation Services FAQ

Answers to common technical questions regarding our turbomachinery interventions.

What is the typical timeframe for a major steam turbine overhaul?

A standard major overhaul for industrial turbines (10MW–50MW) typically takes between 10 to 18 days depending on the scope of rotor re-blading and casing alignment required. Pre-outage planning helps us minimize downtime.

Can you perform dynamic rotor balancing on-site or in workshop?

We perform field in-situ dynamic balancing under actual operating speeds, as well as high-precision low/high-speed balancing in our specialized workshop facilities equipped with heavy balancing rigs.

Why upgrade from a mechanical governor to a DEHC digital governor?

DEHC systems provide microsecond response times to load swings, eliminate mechanical wear/hunting, allow automatic turbine warmup sequences, and offer 2-out-of-3 trip redundancy to prevent catastrophic overspeed events.

Planning Your Next Turnaround Maintenance Outage?

Consult with our chief turbomachinery engineers today for pre-outage health audits, custom blade manufacturing, or full power plant engineering support.

Speak With A Lead Engineer