suction and discharge head for parallel compounding compressors

[herman]

Does anybody know a rule for calculating the diameter of suction and discharge head Copeland, Frascold so on compressors?

Thank you!

[Peter_1]

The diameter for the main header is not that important -take full capacity - but what's extremely important is how you connect the different compressors to that common header.

Suction: make that all will return to the compressors.
Discharge: make that header is lower then the compressors to avoid oil or liquid flowing back during stand-still.

Bitzer has a very good bulletin about this. www.bitzer.de
Read this once

You're speaking about parallel compounding. For me parallel is something complete different as a compound setup.