Just trying to give you a quick response, I'm pretty sure you're referring to what is known as the festo solenoid. A post with some good responses can be found at
http://www.chiefdelphi.com/forums/sh...Festo+solenoid
Here is a PDF that shows you how to wire it and hook up to tubes.
http://www.festo.com/INetDomino/file...TValveAssy.pdf
That is I'm 90% sure that's a festo solenoid if not then I'm not sure