Abstract: Power wheel with double action valves comprises a heat engine in form of a rotating vessel mounted to an axis supported at one end to a frame, or joined into a pipe or flexible hose as the other end is faced up by a side gear confronting a second side gear both gears intermeshing through a plurality of pinion gears mounted between first and second ends of both shafts, the pinion gears are activated through expansion valves concealing the shaft of the pinion gear, a plurality of expansion valves mounted on said outer perimeter on radial axis, each of said expansion valve including:A cylinder with mechanical float valvesA piston with piston rods penetrating the cylinderA valve control bar activated by stroke action of pistonsA helical mechanism to rotate spindle shaft by stroke action of pistonsA spindle shaft with two pawl bushingsA pinion gear joined to said spindle shaftA drive gear for delivering useful work output mounted to the shaft of the vessel or a drill bit whereby the power wheel with double action