I am an electronics engineer trying to build one small underwater mechanical device (about 12 cubic cm) as part of a personal automation project. I have figured out the electronics for this, but I am stuck at one mechanical problem.
I want to make a 3D printable CAD model of the device. Please tell me what kind of mechanism I need, and explain its working principles.
Description: Each device will have one inlet and two outlets ($o_A$ and $o_B$). The inlet is at the top and the outlets $o_A$ and $o_B$ are at the bottom. In an underwater installation, these devices would be placed vertically one below other, interconnected with 3/4 inch PVC pipe. Outlet $o_A$ of the above device will be connected with the inlet of the below device with 3/4 inch PVC pipe. Normally, the solids falling down from the inlet should flow down vertically through the bottom outlet, $o_A$. But occasionally the solids needs to be diverted to the other outlet, $o_B$. How can this be done?
Update I see from the comments that 'Diverter Valve' is what I was looking for. Please explain its working principles.