Here is an 1 inch electric operated ball valve. on the lower right if the link works.
http://www.dultmeier.com/catalog.asp?catname=37|42|43|58|59|&id=100.10.1.4.1
They are used for spraying applications. Several manufactures make these Spraying System, Banjo, Teejet. They work very well, closing or opening in less than a second, and they draw very low currents of 12 volt power. A little pricey though around $110+
These are not ignition protected. However I would have them on my boat if I could swallow the price. I am getting lazy having to manually turn the pvc valves.
I will try to get a pic to work.