R134a Vs R404A

[Julia]

Hello! I'm new here..:)

Can you tell me the comparison between R134a Vs R404A specifically for truck refrigeration system application in Middle East? Thanks.

[TXiceman]

Just look at the Pressure temperature charts. For automotive and air cooled, the condensing pressures will be pretty high. Most automotive A/C is R-134a. I'd use R-134a down to about 0 dF. Below that you will need to switch, I'd prefer R507 over any of the 400 series.

Ken

Ken

[tricky ricky]

R134 is designed for what is called high/medium temp jobs such as chillers R404 is for lower temp work ie freezers. If its for "middle east trucks" then look to see what the supply is for these gases in the middle east and what units you fit to what is recommended by manufacturer.