An electronically driven valve that regulates the flow of hydraulic fluid to a motors is known as an electrohydraulic servo valve (EHSV). Strong hydraulic cylinders are often controlled by servo valves using a tiny electrical signal.
A hydraulic valve controls how a liquid medium—typically oil—flows through a hydraulic system. The location of a spool affects the direction of the fuel flow.
Hydraulic control valves manage the flow of fluid to allow for a variety of hydraulic system operations. The valve's design allows it to modify flow rate by adjusting the energy transfer rate.
The three most common types of hydraulic valves are: