Spring Return-Single acting cylinders
Usually limited to very small, short stroke cylinders used for holding & clamping. The length needed to contain the return spring makes them undesirable when a long stroke is needed.

Gravity Return Ram Type
It contain only one fluid chamber, this type of cylinders is usually mounted vertically. The weight of the load retracts the cylinder. They are sometimes known as displacement cylinders and are practical for long strokes.

Range
 Ram Dia. - 250 mm to 800 mm
 Stroke - 5000 mm (max.)