Parker Hannifin manufactures hydraulic valves in three families: electrohydraulic valves, industrial valves, and mobile valves. The first family includes proportional directional control valves, proportional pressure valves, servovalves, and other electrohydraulic accessories. The industrial valve family includes ball, check, and needle valves, in addition to directional control, flow control, pressure control, and proportional valves. Available mobile valves are ball valves, check valves, directional control valves, needle valves, pressure control valves, proportional valves, and lanyard valves.

Moog offers several types of valves. Its electrohydraulic servovalves and servo-proportional valves are meant for continuous use in both industrial and aerospace applications. The company's cartridge valves, known as slip-in logic elements, are used for directional, pressure, check, and flow control, while its servocartridge valves provide directional flow control using integrated Electric Feedback Control (EFB).