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High-Integrity Heat
Exchangers & Pressure
Equipment. Built for
Reliability.

Safe Professional Innovative

For over 50 years, we’ve combined advanced thermal design with precision British manufacturing. Whether you require standard process efficiency or equipment engineered for complex, high-specification environments, we deliver thermal solutions built to last.

About Graham Hart

Engineering Excellence for Every Process Line

Graham Hart Process Technology Ltd is a world leader in the design and manufacture of bespoke heat transfer and specialist pressure equipment. With more than five decades of experience, we engineer every unit to precise client requirements, ensuring optimal performance, safety and longevity in mission-critical environments.

Our team of process and mechanical engineers provide deep technical understanding, supported by advanced software, rigorous risk assessment and fully integrated digital management systems. Whether your operation requires reliable, hygienic systems for high-volume production or custom designs capable of handling extreme pressures and corrosive media, our equipment is built to deliver long-term reliability and confidence.

Since 2016, we have maintained a 100% On Time In Full delivery record, demonstrating our commitment to quality, professionalism and customer success.

Single Suppy Chain
Design, procurement, manufacture, testing and certification all in-house.
Precision Engineering
From advanced process modelling to large-scale machining up to 2.3 m diameter and 460 mm thick.
Proven Reliability

Over a decade supplying subsea heat transfer innovations.

Global Trust

Preferred partner to leading organisations including Airbus, BOC, GE, and Tata.

We Speak Your Language, Get In Touch Today!  

Heat Exchanger Solutions

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Sectors We Support

From high-efficiency food and drink processing lines to high-specification nuclear and subsea applications, we design and manufacture heat transfer solutions tailored perfectly to your industry's standards.

Industry Sectors:

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Insights from Our Engineers

Expert guidance, case studies and technical updates.
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Ready to Discuss Your Project?

Our engineers are here to help you develop safe, reliable and efficient heat transfer solutions tailored to your process.
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Trusted by Industry Leaders

Our solutions support world-class operations across aerospace, pharmaceuticals, energy, food and national infrastructure programmes.

UKAS AND ISO 45001UKAS AND ISO 14001UKAS AND ISO 9001gbc accredited stampASME U Stamp HolderNational Board RegisteredCyber Essentials Certificate PlusF4N - Fit For NuclearF4H2 - Fit for HydrogenF4CCUS - Carbon Capture Usage & Storage

It was so quiet, I hadn’t realised your Air Cooled Heat Exchanger was operating.
Major Industrial Client
We didn’t believe anyone could design a unit to do this duty—now the rest of the plant can’t keep up with your equipment.
Operations Manager
Your 50-tonne unit fit like a glove… the riggers finished in a day instead of a week.
Project Engineer