Lever 3, suspended on springs 8, is connected by turning pairs A, C and B to the rods of cataract piston 10, spool 4 and piston 2. When the pressure increases in pipeline 1, piston 2 moves upward and, by means of lever 3, shifts spool 4 uipward so that fluid is delivered to the upper end of cylinder 5. Piston 6, together with shutter 7, begins to descend. Descending simultaneously are cataract 10, designed as a cylinder containing a piston that divides it into two chambers connected together through flow-control valve 9, and point A of lever 3. This stretches left spring 8 somewhat. As point A is lowered, lever 3 turns about point B, moving dpoint C and spool 4 downward. After a certain time has passed, spool 4 reaches its central (neutral) position and the downward motion of shutter 7 stops. This establishes a new position of equilibrium, but at a pressure somewhat higher than the specified value. To return the pressure to the specified value, the action of cataract 10 is made use of. Owing to the tension of left spring 8, the pressure in the upper end o the cataract cylinder is somewhat higher than in the lower end, and the fluid begins to flow to the lower end. At this, the piston of the cataract moves upward with point A of lever 3. Spool 4 moves upward again and shutter 7 descends, additionally reducing the pressure in pipeline 1. When the pressure drops in pipeline 1, the elements of the regulator operate in the reverse direction.
$4090$EHP,Rg$