[31] Pressure transfer (1)
The fluid pressure p_1
exerts a force F_1 on the surface A_1 which is transferred via
the piston rod to the small piston. The force F_1 thus acts on
the surface A_2 and produces the fluid pressure p2 . Since the
piston area A_2 is smaller than the piston area A_1, the pressure
p_2 must be larger than the pressure p_1.
The pressure-transfer (pressure-intensification) effect is put to practical use in pneumatic/hydraulic pressure intensifiers and also in purely hydraulic systems when extremely high pressures are required which a pump cannot deliver.