Yeah, it does look like a mold plate. If my memory for physics is any good (and that is always up for debate) it looks like it could operate as follows:
Via side fitting, high pressure liquid is injected, entering the chamber at an angle to cause the disk to rotate. The top fitting would be a...
I am assisting a friend who got hold of an abandoned storage unit from what looks like a fish and reptile breeder. Lots of aquatic hardware and tanks. We found one bit of equipment that has us shaking our heads and acting confused.
I will attempt to describe it as best I can, and post pics...