Doubt On Compressor Operation

Hello Everyone,

Lets suppose, I design a compressor for 5 bar head and it's the only component to overcome the pr. drop in a closed loop (filled with gas).
After calculations the worst pr. drop in the loop comes out to be around 2-2.5 bar.

Now my doubt is according to H-Q curve as head decreases, flow increasesand since flow is fixed (0.2kg/s) will compressor under perform as i am not utilizing overall head (5 bar) or Best efficiency point (BEP) can't be attained or in worst case surge-stall range would be too small to operate the compressor.

please clear my doubts.