Plunger type hydraulic cylinder is a single-acting cylinder that generates force only in one direction—typically extension—using a solid, non-piston rod known as a plunger. Unlike piston cylinders, it does not have a piston or internal sealing between chambers. Hydraulic fluid enters the cylinder and pushes directly on the plunger, causing it to extend, while retraction relies on external forces such as gravity or mechanical load. This simple and robust design allows for high force output with minimal internal components, making plunger cylinders ideal for vertical lifting applications, such as in hydraulic jacks, lifting platforms, and certain types of presses.