Pneumatic (compressed air) control of a large morphing stage. Need advice.

hey guys, this is my first post on here, and im glad I joined such an active, awesome community. XD

I am a stage designer and builder and have been incorporating dynamic movement into my stages, from motors spinning large spinning wheels, to water features and others.

here is a pic of the stage concept I am currently working on.
http://www.mediafire.com/view/7cb7054eby2afm6/Screen%20Shot%202014-06-20%20at%2012.36.14%20PM.png

I am looking into creating a large morphing structure for a stage that is to be built within a month and a half time. The stage is relatively light weight being comprised of large pvc sections, on flexible joints. There will be custom built pvc “pistons” that are used in the design to create a breathing or twisting effect.

I am wondering if any of you has had experience working with pneumatics and can lead me in the right direction.

This is the type of valve I will be using, it’s 12v:
http://www.joyfay.com/1-4-electric-solenoid-valve-12-volt-air-water-9041.html?gclid=CjgKEAjwt4-dBRCDnaTUn-mC_0oSJAC4Q6kGz8E7paEeAqV6cWbOZVll3fq0VMNHeLSNLZGpPQwZkfD_BwE

I am wondering how many solenoid valves I can control with one unit, or if there is a way I can connect up to 8 control valves somehow from one wireless device, using an ipad with touchOSC.

Any help would be appreciated, list of good suppliers, hardware, DIY PVC piston advice etc.

Thanks for reading and I hope to hear from you guys!

If you are using an UNO you can control up to 13 outputs plus 5 if you use the analog input as outputs.
For use with the ipad, maybe this is the answer, you will need wifi shield Arduino Manager for iPhone/iPad - Fabrizio Boco

Maybe this board would drive your solenoids: