GRE Ltd. Thermal Engineering and Cryogenic cooling

05/06/2026

Robin, one of our engineers, has recently attended the ESS site in Sweden, where GRE have multiple pure-water cooling systems installed.

The site was designed to be the worlds most powerful neutron source, where protons are accelerated along a 600 metre long tunnel then hit a tungsten source. This impact spallates the tungsten target and generates neutrons which then scatter into multiple instruments - where groundbreaking research is made.

Robin was there to change a vacuum pump (which removes oxygen from the deionised water to vastly reduce corrosion to the ESS instruments) on one of the systems and complete the Site Acceptance Test on another.

18/05/2026

In addition to making complete turnkey systems, a good portion of GRE's work is building vessels and vacuum components for clients to incorporate into their systems. Shown here is one of a pair of OVC's, which have been built in-house (including the machined rings, ports and cover plates) from customer drawings, then welded, assembled and tested, before being cleaned to the client's specification and shipped. The helium leak testing pictured here resulted in a 'flying colours' pass with a leak rate of less that 1x10-12 mbar.l/s (which was considerably better than the customer's pass criteria).

14/05/2026

While most of the SIVL that we make is mounted above ground, pictured here is around 60 metres of vacuum jacketed pipework designed for mounting within a ventilated trench. Manufactured in 12m sections (with a flexible joint in the centre for compliance), the of the lines will be welded together onsite by our qualified installation team, to ensure vacuum and leak tightness in a confined space. If you have any SIVL / vacuum jacketed pipe requirements, we would love to hear from you, no matter how complex/alternative the routing!

12/05/2026

In addition to making vacuum jacketed lines, GRE Ltd can also design and make pressure testing equipment for safe and convenient site acceptance testing. Pictured here is a test capsule, which incorporates isolation, pressure gauges and quick release couplings for a client wanting to pressure test their equipment with a slick 'one-box' solution.

09/05/2026

With the brief not to mount anything to the walls of a brand-new facility at the Harwell Campus, GRE Ltd have recently designed, manufactured and installed an LN2 distribution system for 2 cryocoolers. The distribution manifold has both automated slam shut valves (to insolate the LN2 supply in cases of emergency) and manual isolation, along with integral 'piped-back' pressure relief. If you have have an LN2 distribution requirement, please get in touch, and we would be delighted to assist with all elements, from design through to installation.

08/05/2026

07/05/2026

Pictured here is one of GRE's 4kW low temperature chillers (-140°C). This unit includes an integral evaporator with motor, infra-red gas leak detection, power supplies for heated doors/windows, plus a web-based control app. Produced for LuxeCryo, a manufacturer of high-end cryotherapy solutions, it's the perfect example of how GRE can adapt a product to integrate with a customer's system

06/05/2026

We’re excited to welcome Ian to the team as our new Workshop Technician 👏

Ian has joined us having a wealth of knowledge in the motor vehicle sector, ranging from mechanical repairs through to finishing (paint spraying etc).

Ian is passionate about trail riding and has developed an impressive talent for fixing and maintaining bikes.

Ian is very enthusiastic and has a very positive outlook on life.

He stood out as someone who will fit with team, expressing a desire for new challenges. His personal objectives for development align with our expectation. Ian has already proven himself to be a very talented person and a great fit for the team – we are extremely proud to have him as part of the family.

06/05/2026

We're not all about huge SIVL systems here at GRE - pictured here is a small section of vacuum jacketed LN2 transfer line, containing manual and actuated isolation valves from , along with triple PRV protection, which is to be added to a customer's system. If you're in search of any type of SIVL-related item, whether it be valves, PRVs, gas vent, phase separators, silencers, small sections or full systems, please get in touch - we would love to help.

04/05/2026

Shown here is a high accuracy heater/chiller design for a vacuum deposition application - this one however, is a little special as it had an integral deionising and pumping system. If you have a particular application for a bespoke heater or chiller (or combi-unit), we would love to hear from you.