When the pressure drops in pipeline 1, the force transmitted by bellows 6 through pin 2 to lever 3 is reduced. As a result, lever 3 is turned by spring 4 about point A so that it closes nozzle 5. At this, the pressure in pipeline 11 increases, and piston 10 moves downward, lifting the right end of lever 8 by means of flexible link 7. Lever 8 turns about fixed axis B and raises valve member 9 to increase the supply of the heat-carrying agent to the system. When the pressure in pipeline 1 increases, the elements of the regulator operate in the reverse direction.
$3896$LHP,Rg$