wabtec westinghouse air brake Repairs Services ASME Code Certified Welders

ASME Code Certified Welders

Whether manufacturing new or replacement coolers, repairs and reconditioning, Unifin uses only ASME Code Certified welders. This includes both ferrous and non-ferrous materials as applies to:

  • MIG Welding
  • TIG Welding
  • Stick Welding
  • Brazing

westinghouse air brake tech Cleaning and Diagnostic Service image 1

Cleaning and Diagnostic Service

Corrosion and the hindrance of heat transfer caused by fouling in heat exchangers are the main reasons for an increase in energy, operating and maintenance costs of a generator. That’s why coolers must be inspected, cleaned and tested on a regular basis. Our standard cleaning and diagnostic service includes a hydrostatic test of the coolers in the received condition (to identify any leaks), a general steam cleaning, replacement gaskets when applicable, and a written initial and final test report.  Regardless of initial test results, the water/headers are removed for evaluation. At that point Unifin issues a set of recommendations and work scope.

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Cooling Solutions

Unifin....your Cooling Solution provider!
Our team of knowledgeable and skilled sales, Engineering, Design and manufacturing teams can devise your custom cooling needs. 
By evaluating thermal requirements and physical layout contraints, Unifin can develop a concise and efficient cooling system utilizing state of the art thermal and CAD programs.

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When cooler conditions are more serious, with plugged / corroded tubes, degraded tubesheets and/or waterboxes, the recommended corrective action is cooler replacement. Unifin can provide brand new in-kind replacements designed to be physically interchangeable in form, fit and thermal function with the originals. And because we often have the original design drawings for existing coolers, we can do this sight unseen – saving you the time and expense of sending us the originals ahead of time for estimating purposes.
The average age of hydrogen coolers at time of replacement is 27 years, with 35 years for air type coolers.

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Spare Parts

Unifin Spare Parts - For all of Unifin's heat transfer products
Here is the answer to keep things cool. Unifin maintains a large and ready inventory of spare parts for the full line of Unifin products:

  • Gaskets
  • Fans
  • Electric motors
  • Pumps
  • Valves

Unifin also supplies a wide range of customized replacement parts and sub-assemblies for generator coolers.
Whatever replacement solutions you require, simply contact us for assistance with part identification and availability.
 For more information, email or call 226-213-7255
Spare Parts Hotline: 1-519-451-0230 

wabtec westinghouse air brake train pressure hydro Testing oil coolers


All coolers manufactured or repaired by Unifin are subject to pressure (hydro) testing:

  • 1 Hour Duration
  • Test Pressure at (1.33 – 1.50) X Design Pressure
  • “Pass” = No Leaks / No Distortions
  • Pneumatic Air (vs Water) Test for Oil Coolers

Eddy Current testing is also available for tube erosion assessment.

wabtec westinghouse air brake Upgrades image 1


Vintage Spiral Fin cooler designs often contain lead-based solder, which could lead to lead carbonate contamination throughout the entire generator system, while Plate Fin designs do not. Unifin offers Spiral Fin to Plate Fin redesign replacement solutions to eliminate this potential issue while resetting your cooler life cycle. Our other upgrades also include material substitutions for improved performance.