Refrigerants


At the end of 2009 the use of virgin HCFCs was banned, what can I use to top up my refrigeration and air conditioning systems?


Climalife are able to offer a number of different options depending on the equipment and how it operates.

We can offer easy retrofit options for R-22 such as R-417A, R-422D, R-427A or other refrigerants such as R-404A, R-407A or R-407C which will require more work.

Alternatively, until 31st December 2014 you can use reclaimed product which is available from Climalife under our own brand of R-22T.

For HCFC blends such as R-401A and R-409A you can use either R-437A or R-134a, whilst for R-402A, R-403B and R-408A you can replace with R-422A or R-404A.

Each Climalife office has knowledgeable people who can help you match your system requirements with the correct refrigerant. To find out more you can contact your local office or alternatively email us details of your system and one of our Climalife experts will reply to you.
Markets : Industry, Housing, Apartment buildings & service sector, Commercial
Mar 17, 2010

See the file

Do refrigerant blend components separate if there is a leak?

 

The simple answer is no. The individual components of a blend do not separate out of a blend, but you may get composition shift, in some circumstances.

 

Azeotropic mixtures behave like pure substances and do not separate with the composition of the liquid being the same as in the vapour.

 

The situation with zeotropic mixtures, requires more explanation if there is a leak.

 

Blends composing of fluids of similar properties where they have a very small temperature glide have only a very small difference in the component composition between the liquid and the vapour phases. In the case of a leak, simply topping up will usually keep the blend within the component specification. i.e. R-404A, R-410A.

A blend with a greater difference (for example R-407C) can see a small composition shift if a system has a leak. Usually fixing the leak quickly can prevent any significant change and a simple top up will keep the blend within specification.  A more prolonged gradual leak may lead to an increased risk of composition shift and depending on the type of leak and its location in the system may affect the composition of the fluid left in the system.

 

To try and establish any significant shift in composition, simply measure the pressure/temperature ratio and this will show if the mixture has changed from its initial proportions. Acceptable pressure difference is P< 0.3 to 0.5bmax.

 

When a blend leaks, all components of the blend will leak, but in some circumstances the composition of the leaking blend will have slightly more of the lower boiling components. However, it should be noted that no individual component leaks on its own.

 

Jan 15, 2008

See the file