Your more than welcome.
Out of all of the research I have done I have found these valves to be the best fit for everything.
They would be the 2500 Series valves from Irritrol with flow control.
They will work from .025 GPM to 30 GPM.
Some valves will open at a low flow rate but wont close.
You dont want that for obvious reasons.
The reason for the flow control is two things you control the flow if you wish and the other in important.
If at full flow it wont close you can turn down the flow with this valve and it will close.
Worth
http://www.sprinklerwarehouse.com/Ir...e-p/2500tf.htm