Plunger-type

(A) A plunger hydraulic cylinder is a single-acting hydraulic cylinder that can only achieve movement in one direction due to the liquid pressure; the retraction of the plunger relies on 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 and 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 quite heavy, and when placed horizontally, it tends to sag due to its own weight.Sealing ComponentsAnd with single-sided wear guidance, its vertical usage is more advantageous.

Extendable

Telescopic hydraulic cylinderPiston rods in telescopic hydraulic cylinders with two or more stages extend in a descending order, while retracting under no load typically follows an ascending order. These cylinders allow for longer strokes when extended and a shorter, more compact length when retracted. They are commonly used in construction and agricultural machinery. With multiple pistons moving in a single stroke, the output speed and force vary as each piston sequentially moves.