High-Integrity Heat
Exchangers & Pressure
Equipment. Built for
Reliability.
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.
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.
Over a decade supplying subsea heat transfer innovations.
Preferred partner to leading organisations including Airbus, BOC, GE, and Tata.
Heat Exchanger Solutions

Shell & Tube Heat Exchangers
Robust and versatile units engineered for high-pressure, high-temperature and corrosive environments.

Air Cooled Heat Exchangers
Efficient cooling systems ideal for water-scarce locations and remote operations.

Crossflow & Heat Recovery Systems
Custom designs for stack gas recovery, combustion air preheating and process fluid heating.

Bespoke Engineered Equipment

Double Pipe Heat Exchangers
Optimised for space-constrained and high-duty applications, and provide a practical and efficient alternative to traditional shell and tube designs.
Reactor Vessels
Provde precise thermal control for critical processes, supporting high-pressure reactions in controlled operating conditions.
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:



Chemical
Robust heat transfer and pressure solutions for demanding, corrosive chemical processes.



Insights from Our Engineers

Boosting Cooling Performance for an Agriculture Client
Category: Case Studies

Efficient Condensate Cooling
Category: Case Studies

Increasing Process Throughput
Category: Case Studies
Unlocking Process Efficiency in Heat Exchangers
Category: News

Graham Hart Achieves Cyber Essentials Plus Accreditation
Category: News
Graham Hart Process Technology MD Named Among the UK’s Top Manufacturing Leaders
Category: News