Upon a change in pressure in Bourdon tube 1, the motion of its free end is transmitted by pin 2 to jet valve nozzle 3. Nozzle 3 is diverted and fluid, delivered under pressure to the nozzle, is directed through one of the channels to one or the other end of the cylinder of servomotor 4. As the fluid moves piston 5, its rod actuates the regulating member that restores the required pressure in the space connected to Bourdon tube 1.
$4107$EHP,Rg$