Plunger style

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

(2) The piston 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 plunger weight is often quite heavy, and when placed horizontally, it tends to sag due to its own weight.Sealing PartsAnd with single-sided wear guidance, its vertical use is more advantageous.

Extendable

Telescopic hydraulic cylinderPistons in telescopic hydraulic cylinders with two or more stages extend in a descending order from large to small, while retracting in an ascending order when unloaded. These cylinders allow for longer strokes and a more compact structure when retracted. Such hydraulic cylinders are commonly used in construction and agricultural machinery. With multiple pistons in a single stroke, the output speed and force vary as each piston moves sequentially.