Bought a check valve to simplify my system as I dont really trust my solenoid. I am also not duty managing the solenoid so a simple check valve make more sense.
Seller did not reply about this valve opening pressure so I did a flow test.
Solenoid 100% open = 430g/min
Check valve = 365g/min (down 15%)
Flow can be compensated with a bigger nozzle but the pressure is lost which will impact atomization - I think it is worth it though for a more reliable system