When the pressure on membrane 1 is increased, the membrane is bent to the left, shifting jet valve nozzle 2 so that it is opposite left-hand channel a which is connected to the right end of cylinder 3. From the left end of cylinder 3, fluid is delivered to the right end of operating cylinder 5. As piston rod 6 moves to the left, it makes the necessary changes in the item being controlled (not shown). At the same time, lever 7 is turned about fixed axis A and, through spring 4, shifts jet valve nozzle 2 back to the central position. When the pressure on membrane 1 is reduced, piston rod 6 moves in the reverse direction.
$3911$LHP,Rg$