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Technical
Two new IOR guidance notes are now available:
- Pressure Relief Valves on Carbon Dioxide Systems (GN40)
- Quality and Special Processes in RACHP (GN41)
The IOR Technical Committee has published two new guidance notes that will be useful for those working in refrigeration, air conditioning and heat pumps.
The first – Pressure Relief Valve Sizing in Carbon Dioxide Systems (guidance note 40) - was developed as a result of designers, specifiers and end users making the IOR aware that there was some uncertainty around the selection and location of PRV for higher pressure refrigerants in BS EN 13136:2013 the new ISO 24664. The Guidance will form the basis of ongoing discussion with those responsible for revising these standards.
The second – Quality and Special Processes in RACHP (guidance note 41) – provides general information about the use of quality management and control systems for processes common in the sector such as brazing, that are deemed “special processes” within ISO Quality Management Systems frameworks. This guidance note explains some of the special processes used within the RACHP industry, what steps should be taken to manage and verify them, and provides additional information as to how this applies specifically to Brazing.
These two publications form part of a series of technical guidance notes produced by the IOR designed to improve safety and raise awareness of best practice and standards in the sector. They are available to download from www.ior.org.uk/rachp-publications
Download the above publications and many more from our technical library.
Recent posts
F Gas Phasedown Reform Consultation - Recording Available
11 Nov 2025
The recording of the webinar featuring DEFRA and industry experts discussing the impacts and opportunities for the RACHP industry following the launch of the UK Government’s consultation on reforming the HFC phasedown under the GB F Gas Regulation is now available.
Recording
New Technician Good Practice Guides Available
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Topics of the new bulletins include direct expansion water-to-refrigerant evaporators, electrical safe isolation and determining the wattage of electric heaters.
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GB F Gas consultation launched by DEFRA
5 Nov 2025
The outcomes will be used to shape future legislation for our sector. Take part in this consultation to make the views of the RACHP industry heard. Industry groups will be coordinating a response through ACRIB (Air Conditioning and Refrigeration Industry Board).
News
Talk on the Future of Compressors Now Available
5 Nov 2025
The talk by Prof. Ahmed Kovacevic, FREng on emerging technologies in compressors and their systems is now available from the IOR website.
Recording
IOR’s Committees Share Achievements and Plans
3 Nov 2025
On 29 October, the IOR members met to share their reports on activity, plans and strategies for the future. Seven IOR committees met, including Membership, Education, Environment, Technical, Engineering Technician Group, Women in RACHP, and the Dinner Committee.
Live eventSitemap
