Pulse-width Modulated flow control allows you to change travel speed by a factor of about five without a change in spray pressure. This chart shows which nozzle flow rates to use. Note the significant pressure drop across the Capstan solenoid. This value must be added to the cab spray pressure, as explained here.
Capstan Tip Chart (with Pressure Drop).pdf
Capstan Tip Chart (with Pressure Drop) US units.xls