Plunger type

A plunger-type hydraulic cylinder is a single-acting hydraulic cylinder that can only achieve motion in one direction due to the liquid pressure; the retraction of the plunger requires an external force or the weight of the plunger itself.

(2) The plunger is supported 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; when horizontally placed, it is prone to sag due to its own weight.SealingsAnd with uni-directional wear, it is more advantageous for vertical use.

Adjustable

Telescopic hydraulic cylinderPiston rods in telescopic hydraulic cylinders with two or more stages extend in a descending order, while retracting under no load is typically in ascending order. These cylinders allow for longer strokes when extended and a shorter, more compact length 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.