Oh yeah... the pressure that the penductors need might even cause the SCWD to explode... normal operation is out of the question.
If you want a flow controller for a system using penductors/eductors, you should be looking at something like this...
http://cgi.ebay.com/ws/eBayISAPI.dl...MEWA:IT&viewitem=&item=110117564918&rd=1&rd=1
A 3-way ball valve with electronic solenoid. They do make a 'pop' and click every time they rotate though, but they are perhaps the only valve that can take the pressure needed for an eductor system.
Spears and Hayward are two mfg's to look at.
Me personally, I dont think eductors are worth it. The amount of flow you lose from the back pressure is pretty serious, and you need a higher pressure (higher wattage) pump, and then, even though you may get back 4-5x the flow from the eductor, thats only 4-5x the flow actually going through the eductor, which on a 2000gph pump, might only be 800gph or less, and a couple hundred watts on the pump.
Its just easier, IMO, to run lower-pressure, flow-rated, low-wattage pumps with open outlets and larger piping. Thats what the OM was designed for really.