5 Jan 2023
This guidance note provides guidance on the different methods used to manage oil in ammonia refrigeration systems. It supersedes guidance note GN17 which has been withdrawn. In this guidance note the term “oil” is used to cover a range of lubricants including mineral oil, synthetic oil, processed mineral oil (for example, hydrocracked oil) and other synthetic compounds such as alkyl benzene, polyalkyl glycol, polyol ester and polyalfaolefin. Not all of these synthetic compounds are compatible with ammonia.
Oil management on the low-pressure side of ammonia systems is necessary to keep the evaporators in good working order and to maintain system efficiency. The type of facility provided for the removal of oil from the low-pressure side of the system depends on the type of system, the type of oil, the level of manual intervention expected by the end user and the capital cost constraint on the installation.
Members - sign in to your web account to download this free pdf.
Not a member? Join here to download this and other publications
15 Sep 2025
This year’s AGM will be held on 29th October. members can vote in advance, or attend live in person or online.
10 Jul 2025
The IOR’s RACHP EngTech Section is proud to announce the launch of an innovative mobile technician’s app, now available on the Apple App Store and Google Play Store.
6 Oct 2025
HSE is gathering information and evidence relating to the Pressure Systems Safety Regulations 2000 (PSSR) and whether their scope and application are still fit for purpose.
30 Sep 2025
The paper by Prof. Ahmed Kovacevic, FREng on emerging technologies in compressors and their systems is now available and will be presented online and in person on 29 October 2025.
29 Sep 2025
Congratulations to all the winners and shortlisted candidates whose success highlights the passion and talent driving the RACHP sector forward.