• What are hydraulic pistons?

What are hydraulic pistons?


In everyday language, with the term hydraulic piston, you refer to a hydraulic linear actuator or hydraulic cylinder. The reason why hydraulic pistons lost this meaning goes back to the fact that hydraulic pistons are a part of hydraulic cylinders: cylinders are made up of an empty body (the cylinder itself), a rod and a part, called piston, which slides inside it. In the strictest sense of the word, hydraulic pistons are a part of hydraulic cylinders. But you can hear of single or double acting hydraulic pistons or plungers meant as a whole hydraulic actuator.


The double acting cylinder, wrongly called double acting hydraulic piston, differs from the single acting one as it can move in both axial directions, making the piston slide in two ways. The oil is pushed by the pressure in the pushing chamber, as well as in the pulling one, generating a movement which assures the complete control of the system to be operated.

It is particularly suitable for those equipments which do not allow the piston return thanks to the sole gravity force, for example because they work in an oblique or upside down position.