Results 1 to 3 of 3
Thread: Manual expansion valve
-
18-04-2019, 10:54 PM #1
Manual expansion valve
I知 looking to construct my own refrig system using r404. I want to be able to change the temperature of the evap coil. I知 looking to to vary between-30c and -50c. I知 prob going to use a compressor between 1/3 and 2/3 hp.
Is there something on the market that exists? Does it have to be packless? I could use a cap tube, but it would be a lot of guess work as I壇 like to use salvaged parts.
Thanks!
1001yos
-
18-04-2019, 11:57 PM #2
Re: Manual expansion valve
I would suggest an electronic expansion valve but it might not be cost effective.
Although you might be able to salvage an EEV from a modern AC unit you will have to either invest in a controller for it or build your own.Last edited by Brian_UK; 19-04-2019 at 12:03 AM.
Brian - Newton Abbot, Devon, UK
Retired March 2015
-
19-04-2019, 04:09 PM #3
Re: Manual expansion valve
Have a look for a suitable 'Automatic Expansion Valve', they control the flow to the evaporator by maintaining a set pressure which you can adjust maunally.
Mostly found in Oxfordshire, UK :)