What's wrong with this

[Floor]

If Ou can be done any where, then it can be done any where ?

Please find the attached file OUfloater 3.pdf

Cheers
       floor

[Floor]

Place a negative gas pressure inside (vacuum)  "sealed gas tank" to eliminate air friction.

Yes, pressure will be the same at both valves, so it won't help with inserting the bottom float. 
But the bouyancy of the floats will contribute some amount to the insertion of the bottom float.


                  Cheers
                           floor

[Floor]

The surface area of the floats can be changed with out changing the volumn of the floats.

The shape of the floats can be changed without changing the volumn of the floats.
This can make the floats more streamlined after they pass through the valves.

                               floor

[Floor]

The shape of the floats and the smoothness of their surfaces will affect the energy lost
as the floats rise through the fluid.

The viscocity of the fluid will affect the friction against the floats.

The turbulence in the fluid opposing the floats riseing, will DRAMATICALLY
increase with the speed of the floats riseing. 

Slow the riseing of the floats by collecting the energy of their riseing.

                    floor

[TinselKoala]

If you are allowed to use "magic" anywhere in your design, it's not allowed in the real world.

For example, I have permanent magnet motors that only need negative-coefficient of friction bearings to run without outside power.

It is real-world losses that prevent most every Free Energy device from operating in the real world. Magic valves are nice, though. Wake me up when you can buy them from your local sorcerer and we'll see if they will work in your design. Please pick up some negative friction bearings for me while you are shopping, won't you?

Don't forget that as you push up the bottom floater through the bottom magic valve, you are not only lifting it against gravity but you are also pushing out the top floater through its magic valve, lifting it up against gravity as well.