A double-acting hydraulic cylinder has a port at each end, supplied with hydraulic fluid for both the retraction and extension of the piston. A double-acting cylinder is used where an external force is not available to retract the piston or it can be used where high force is required in both directions of travel.

The working principle of single-acting cylinders are to transfer hydraulic fluids or an output force in one direction only. Within the cylinder, the piston rod can push outwards but cannot pull back, therefore requiring a force in the opposite direction to return the rod back to its original position.

Hydraulic seals are gasket-like rings that are designed to seal areas between the components in a hydraulic cylinder. Hydraulic cylinders contain many different components, some of which are exposed to the fluid. To prevent fluid from leaking around these components, hydraulic seals are used. Hydraulic seals are designed to fit the components in a hydraulic cylinder while creating a leak-proof seal around them.

Mill – Type are cylinders designed to fill a need for a more durable, more reliable product to reduce down-time and maintenance costs.

Telescopic cylinders are used when an application requires a compact retracted dimension, but needs a longer stroke. These cylinders are generally single acting and are available in two to five stages. Common mounting options for telescopic cylinders are trunnion and cross-tube.

Tie-rod cylinders are most often used in industrial applications. They use high strength, threaded steel rods and nuts to hold square or rectangular end caps to each end of the cylinder barrel. Seals are placed between the barrel and end cap to prevent leakage

Telescopic cylinders are used when an application requires a compact retracted dimension, but needs a longer stroke. These cylinders are generally single acting and are available in two to five stages. Common mounting options for telescopic cylinders are trunnion and cross-tube.

Allow hydraulic oil into different paths from one or more sources. Will usually consist of a spool inside a cylinder which is mechanically or electrically actuated. The position of the spool restricts or permits flow, thus it controls the fluid flow.

O-rings are used to seal all kinds of devices to keep them operating and safe. They do so by keeping necessary fluids in hydraulic systems and unwanted fluids and contaminants out.