The compressed refrigerant is delivered to the second stage compressor 46 where it is combined with the vapor overhead from the separator vessel 72 and {HEAD ~ the thus compressed combined streams} are delivered to the third stage compressor 48 where the vapor phase from separator vessel 60 is combined with {TAIL ~ the compressed refrigerant} and is compressed to its highest pressure in the exit line 50 
The compressed refrigerant is delivered to the second stage compressor 46 where it is combined with the vapor overhead from the separator vessel 72 and { HEAD ~ the thus compressed combined streams } are delivered to the third stage compressor 48 where the vapor phase from separator vessel 60 is combined with { TAIL ~ the compressed refrigerant } and is compressed to its highest pressure in the exit line 50
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH