Upon a change in speed of the shaft being regulated, the sleeve of centrifugal governor 1 moves up or down, turning lever 2 about fixed axis O. At this, lever 3 shifts valve spool 4 and fluid from the valve is delivered to one end of servomotor 5, moving piston 6 up or down. Through lever 7, this shifts valve spool 8 and fluid from the valve is delivered to one end of servomotor 9, moving piston 10 up or down. This closes or opens regulating gate valve member 11. Feedback levers 3 and 7 return valve spools 4 and 8 to their central position. The consecutive operation of two cascades (valve-servomotor sets) provides an actuating force sufficient to operate heavy regulating members.
$4259$CHP,Rg$