Plunger type

(1) A plunger hydraulic cylinder is a single-acting hydraulic cylinder that can only achieve movement in one direction due to the hydraulic pressure; the return stroke of the plunger requires an external force or the weight of the plunger itself.

(2) The plunger is supported solely by the cylinder sleeve without contacting it, making the sleeve easy to machine, thus suitable for long-stroke hydraulic cylinders.

(3) The plunger is always under pressure during operation, thus it must have sufficient rigidity.

(4) The weight of the plunger is often substantial, and when placed horizontally, it tends to sag due to its own weight.Sealing ComponentsThe single-sided wear is guided, making its vertical usage more advantageous.

Extendable

Telescopic hydraulic cylinderHydraulic cylinders with two or more stages have pistons extending in a sequence from large to small, while retracting under no load generally follows a sequence from small to large. These telescopic cylinders can achieve longer strokes, becoming shorter and more compact when retracted. Such cylinders are commonly used in construction and agricultural machinery. With multiple pistons in a single motion, as each piston moves sequentially, both the output speed and force vary.