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Heat Exchangers Defence

Keep the kit working with the right heat exchange solution

We are proud to have provided world-leading, innovative heat exchangers to the defence sector for more than 50 years. We’re the partner of UK’s and allied armed forces supplying them with equipment that is robust and dependable, using the most modern materials and manufacturing techniques. We do this while always respecting confidentiality and ensuring security.

We also understand the need to keep older equipment in service. Therefore, we deliver either exact replacement parts or upgraded alternatives for a wide range of heat exchangers.

Extending the life of vital defence equipment

Protecting the legacy

We have supplied heat exchange technologies to the defence sector for more than 50 years. Brand names of the many original companies that form Sterling Thermal Technology include Thermo Engineers, Sterling Process Engineering, PCC Sterling, HEI, Britannia Heat Transfer, and Britannia Heatex.
Our pedigree is a major benefit in a sector which often keeps equipment in operation for up 20 to 30 years. We source maintenance and repair expertise when necessary, and of course spare parts. When equipment needs to be upgraded, we have the appropriate technical knowledge and experience to help deliver the right solutions while keeping costs under tight control. 

Providing modern solutions and the right advice

When required, we can still design and manufacture the original heat exchanger technology used in older equipment. Where possible, we advise on upgrades to new materials and technologies that deliver improved performance, reliability and longevity. This helps to extend the life of existing equipment.

Maintaining trust and confidentiality

We understand that confidentiality and control of sensitive information are vital to you. Therefore, we employ trusted, reliable people who are thoroughly vetted.

Our products and services


                    Photo of Titanium air coolers and oil cooler for the defence sector designed and manufactured by Sterling Thermal Technology


  • Navy ships throughout the world including the UK, USA, Canada, Australia, UAE,
  • Surface ships include: LPD, LPH, CVF, T23, T45, T26, DDG, T ake, LPM
  • Submarines include: Vangaurd, Trafalgar, SSK/Victoria, Astute, NEW
  • Auxiliary ships include: RFA Argus, Diligence, Wave Knight, Wave Ruler, Orangeleaf
  • Land bases: Sterling TT coolers are fitted to the generators and radar equipment such as RAF Fylingdales and Nap Hill
  • Mobil applications (e.g. radar equipment)

For more information about our customised heat exchangers, visit our products and services page.

Customised heat exchangers

Over 100 years of design & manufacturing knowledge

Your partner for the entire lifecycle of your business

“We know that we can rely on Sterling Thermal Technology’s equipment. They are robust, which means that we can keep them for decades. Also, SterlingTT respects confidentiality, which is crucial to us as we are working with the defence industry. Knowing that they are Cyber Essentials certified gives them additional credibility.”

A leading provider of engineering services to the defence sector

Talk to us..

We can help you by remanufacturing your heat exchangers or by repairing your existing ones. And, you can trust us to respect the confidentiality of your project.

Contact us