A booster pilot valve (10) operable at ultra low power levels is provided. The booster valve (10) includes a movable spool (160) capable of directing a fluid flow (170) to at least two different paths (118, 119). The booster valve (10) may be coupled to a piezotronic three-way valve (40), which controls the movement of the spool (160) by redirecting a main fluid flow (170) along different paths to create a force on the spool (160). The piezotronic valve (40) is capable of actuation at very low power levels such as might be provided by a Profibus PA or other Bus system.
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