Auxiliary Systtem
1. Lube Oil Console
2. Run Down Tank
3. Seal Oil Console
4. Cooling Water Console
5. Suction Knockout Drum
6. Pulsation Dampener/Volume Bottles
7. Seal Gas Unit
http://www.piping-engineering.com/auxiliary-units-of-compressor.html
AP1000
AP1000 Design Control Document
https://www.nrc.gov/docs/ML1034/ML103480567.pdf