Sounds almost like an old fashioned synthetic heart valve, called the Ball and Cage. It's a one way valve. When the fluid tries flowing in one direction, it forces the ball away from the hole, where it is caught by the cage, allowing the liquid to flow through. In the other direction, the fluid forces the ball against the hole, preventing the fluid from passing.
You could instead make a T-shaped gravity independent valve, in which there are two holes the fluid could exit. Unfortunately, it wouldn't be pressure independent. The pressure would be applied to the vertical tube, and the ball would be trapped between the two exit holes. Two coils either pull the ball valve to one side or the other, and then turn off. The pressure of the fluid flowing through the other hole keeps the ball in place. Thus, by using the pressure, the ball can be held to either side without power, but this means that the ball is subject to the influence of pressure in the first place, so it would take more energy to make it cross the barrier.

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