I`m moving into air assisted now but i`m happy to tell you how i set up for high pressure aero. The single most important piece of kit to buy is an accumulator as it solves most of the issues on its own.
Frophead made some interesting comments regarding using just a pump but unfortunately the theory doesn`t hold true when its put into practice.
The pressure ramps up/down and a 2 second total misting would be impossible to achieve as the lines will tend to depressurize through the nozzles. In an ideal world a nozzle will create 50 micron droplets from 0-110psi but they don`t, so you can expect to see much larger sizes (200micron+) at the start and end of each misting cycle.
An good analogy of that would be throwing a big can of paint at a canvas, then meticulously painting a masterpiece over the top and then throwing another big can of paint on top of that :)
Buy an accumulator sized to run the system for a full week/2 weeks or whatever you`d like, use a 12v dc cycle timer, 12v solenoid and a 12v battery (no power outage issues with nute delivery).
If you adopt my approach you`ll then visit your local professional plumbing tool supply company and buy the only pump you`ll ever need for this job..a "high-flow" hydrostatic test pump.
These pumps are manually operated, they dont need any power and are more than capable of the task. I use a Rothenberger RP-50, it can deliver upto 60-bar (880psi) of pressure, 100psi is nothing.
The flowrate is very low at just 45ml/stroke but it will put 0.75gal/min into the tank at any pressure at a very leisurely pace..it takes just 5 minutes a week.
Anywho, use the pump to charge the accumulator to the required pressure (100psi, 200psi etc) and then disconnect the pump for a week. No pressure switch, no relief valve and no backup pump. If you need to expand, buy another accumulator..still only 10 minutes a week :)
If you want to run it in a remote location, or in the middle of a field, just add a solar panel to charge the battery. Visit once a week to recharge the tank and then take the pump home with you.
Epic post.. sorry about that but hopefully its enlightened a few aero sceptics :)
Bobby, 200 years may not be unreasonable to be honest and you`ll only need the one.
They seem pretty expensive items stateside (much cheaper here) note that the RP-30 is cheaper but it doesnt have as much flow as the RP-50 so it`ll take longer to charge the tank.
http://www.rothenbergertools.us/20-RP30_RP50_&_RP60_Hydrostatic_Hydraulic_Test_Pumps.html