Skip to main content
  • Tel +44(0)1274 617021

High-Integrity Heat Transfer & Pressure Equipment for the World’s Most Demanding Industries

Safe. Professional. Innovative. Delivering bespoke engineered solutions with 100% On Time In Full performance since 2016.

For over 50 years, we’ve combined advanced process and mechanical design with precision manufacturing to build high integrity and pressure equipment trusted in the harshest operating environments.

Engineering Excellence for Critical Industries

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 faces extreme pressures, aggressive media or stringent regulation, 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 the UK Submarine programme and world-first subsea heat transfer innovations.
Global Trust
Preferred partner to leading organisations including Airbus, BOC, GE, PepsiCo and Tata.

Heat Exchanger Solutions

View all products

Sectors we serve

Engineered for the Harshest Industrial Environments

Our equipment is built to perform in the most challenging global applications — from subsea to nuclear, from sterile pharmaceutical environments to corrosive chemical processing.
Industry Sectors:

View all sectors

Insights from Our Engineers

Expert guidance, case studies and technical updates.

Ready to Discuss Your Project?

Our engineers are here to help you develop safe, reliable and efficient heat transfer solutions tailored to your process.
Speak to an Engineer

Trusted by Industry Leaders

Our solutions support world-class operations across aerospace, pharmaceuticals, energy, food and national infrastructure programmes such as the UK Submarine Programme.
USO 45001:2018 Accreditation
Major Industrial Client
“It was so quiet, I hadn’t realised your Air Cooled Heat Exchanger was operating.”
Operations Manager
“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.”
Project Engineer
“Your 50-tonne unit fit like a glove… the riggers finished in a day instead of a week.”