What do you say about this solution for HP Aeroponics spray system.
1 Activate Direct Drive Solenoid Valve
2 Start HP diaphragm pump (~4l/min ~0.7MPa). The nutrition flows back into the reservoir, pressure in pipe is to low for antidrip nozzle.
3 Deactivate DDSV for 1 second. Preasure rise in a moment and nozzle uniformly sprays for 1 second
4 Stop pump
Pipe OD 1/4" or 3/8"
One of the advantage of these system is, that you can detect clogging by measuring pump current consumption and (or) pressure during spraying.
The water in the pipes can be replaced with cold from the tank before spraying.
You can change nutrition in few second, without interrupting the system.
We need 2 branches because DDSV have oriffice only 2.5mm and douring open stage pressure at anti drop nozzle must be low enough that there is no spraying.
I’m waiting for these and these DDSV
For pressure regulation, pump could be powered at lower voltage via these DC DC converter, which also limit starting current and increase pump lifetime. Converter can be connected to 12V accu, which have 13.7V when it’s full