A second source of seal air is provided from {HEAD ~ a tap port} disposed at {TAIL ~ a predetermined location} on the compressor discharge 
disposed at
A second source of seal air is provided from { HEAD ~ a tap port } disposed at { TAIL ~ a predetermined location } on the compressor discharge
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH