Waste of compressed air is limited. Simple and cheap solution to drain condensates.
SCG20 and ATD02 are usually used as accessories of:
FT Air Filters: Aluminium filters and separators for compressed air
FW Air Filters: Flanged filters for compressed air
LF Air Filters: Spin on type filters for compressed air
AFR - Aftercooler: Air/Air aftercoolers
CCS - Condensate Separators: Carbon steel condensate separators