DX Ammonia

[towd crank]

Does anyone on here have any experience or advice about the use of these?

[Brian_UK]

A little light reading perhaps?
http://www.nhtres.com/differs.php#_ftn4

[Magoo]

DX ammonia refrigeration,
hand expansion vavs, thermo expansion vavs, overfeed systems with orifices and or hand expansion vavs., pulsing electronic expansion vavs. high pressure liquid supply, sub cooled liquid , pump fead liquid and sub cooled.
A fairly broad subject is DX ammonia.