这种压电效应可用于许多应用，例如用于产生或检测超声波，用作打火机或丙烷烧烤架的点火源（火花），或精细移动光学镜头，以使智能手机的相机自动对焦。

压电技术还为开发用于控制气体压力或流量的阀带来了新的可能性。当将电压施加到压电弯曲片时，它会弯曲并脱离阀座。电压越高，执行器弯曲幅度越大，流过阀的气体就越多。

Piezo ceramics act like a small capacitor, with the applied voltage charging the ceramic material and thus bending it. To regain its original shape, the material must be actively discharged. Piezoceramics do not require energy to maintain an existing mechanical deformation. Even after a power failure, the valve retains its current position.

Therefore energy is only required if the shape of the piezo bender has to be changed, i.e. the charge of the bender itself has to be changed. The amount of energy required in this case is very small (in the order of 1 mWs), as piezoceramics have a small capacitance (between 20 nF and 40 nF). Solenoid valves, on the other hand, require a continuous energy supply of several watts to maintain the open state, with the solenoid valve also heating up in the process.

Thanks to its low energy consumption, piezo technology is ideal for battery-powered devices (which consume much less power than solenoid valves) and for applications where the valves must not heat the gas.

Piezo valves cannot be used as a substitute for solenoid valves. Piezo valves operate at higher voltages of up to 310 V, while solenoid valves operate at 5, 12 or 24 V. Simple piezo driver electronics are always required to generate the necessary 250 – 310 V from the 5-, 12- or 24-volt power supply and to charge and discharge the piezo bender. Although 310V may seem high, the corresponding current is very low (max. 5 mA with 50 kOhm series resistor at the output). The piezo electronics can be designed to be electrically safe so that the voltage immediately drops to well below 50V when the contacts are touched.

Festo offers a wide range of valves with piezo technology for different flow rate or pressure requirements in a variety of applications. These valves can also be used to control pure oxygen gas, as their materials are tested for oxygen compatibility.