• About Rainbow
  • Refurbishment Services
  • Specialized Services
  • Gallery
  • Contact Us

Rotary Equipment

Rainbow has the equipment and skilled technicians to provide various services for rotary equipment such as pumps, compressors, turbines and turbo chargers.


Rainbow has the facilities to overhaul, repair, refurbish, fabricate and manufacture a variety of pumps and pump components. Manufacturing of pump components is carried out by customer specification, drawings or by reverse engineering through customer provided samples. Commonly manufactured pump components include:

  • Impellers
  • Pump casings
  • Pump shafts
  • Diffusers
  • Wear rings
  • Couplings
  • Sleeves
  • White metal bearings

In addition to the above components Trinity also repairs the following components:

  • Mud Pump Crank Shafts
  • Mud Pump Connecting Rods

Specialized services such as protective coatings, surface treatment or heat treatment is carried out for corrosion resistance and improved life of pump components.

Pump ComponentsPumps2Diffusor Bowl

Gears, Gear Boxes & Sprockets

Rainbow has the expertise to overhaul and machine gear box assemblies of various types. After complete tear down, each component is inspected and a report is provided to the customer identifying all parts that need to be replaced or repaired. Rainbow has an in-house heat treatment facility for induction hardening, annealing, carburizing, nitriding, hardening and tempering to improve surface properties of gears and sprockets.

Gears - Gearboxes and SprocketsGears - Gearboxes and SprocketsGears - Gearboxes and Sprockets

Compressor & Turbines

Rainbow carries out repair, reconditioning and manufacturing of compressor and turbine components. Repair services include thermal spray, machining, grinding, sand or grit blasting, dynamic balancing and Praxair’s SermeTel® & SermaLon® protective coatings to all major industries such as oil & gas, power generation and marine.

Components reconditioned include:

  • Compressor Casings
  • Compressor Rotor
  • Impeller wear rings
  • Compressor engine components
  • Turbine blades
  • Thermal barrier coatings (TBC) on turbine nozzles, transition pieces & liners
  • Protective coating on clamp shell and fuel nozzles

Impeller AssemblyCompressorsCompressor Coatings