Hydraulic cylinders are linear actuators. They are powered by hydrostatic energy. Actuators are components of a machine. These components move inside the machine, enabling it to perform a desired action. These units create force in a straight line by either pushing or pulling. A hydraulic bottle jack is an example of a cylinder. It raises a central piston to provide upward motion to lift weight. It directs a small energy input then it amplifies it in a specific direction. We carry a complete line of Parker cylinders and actuators.