Good Hydraulic Cylinders – We Make Sure Inside Parts
The tube follows GUOYUE CD250 style.
Tube steel can be 45#, 42CrMo, or 27SiMn.
Hole is ground to H8 and feels smooth, Ra under 0.4 μm.
Head, base, ears, and piston are only 45# steel.
We do not use cast iron or cast steel. Slow-Down Parts
You can pick fixed bumpers or floating bumpers so the rod slows down safe at any speed or load. Welds
We hit every heavy-load weld with ultrasound.
This takes away most of the stress and makes the weld last longer. Seals
We only use top seals from NOK (Japan), Trelleborg (Sweden), Merkel and GP (Germany).
We do not use local seals. Checks
Each cylinder is tested to GB/T15622-2005 and our own Q/GAKY014-2023.
You get a test sheet and a pass paper. Promise
We give one year cover from ship date.
If it breaks because of how we made it, we fix or swap it for free.
This cylinder is strong. It uses thick steel and hard rod. It does not bend. The seal keeps oil in, no leak. It has many tubes that slide out one by one. It lifts high but stays short Advantages:
She’s the quiet muscle born from a workshop that still smells of fresh coffee and welding sparks. An OEM maker spins each tube, rod, and seal like a tailor cutting cloth, so every cylinder fits your dredge like it grew there. Chrome skin laughs at salt, grit, and surprise overloads, while balanced oil paths keep the stroke silky—no coughs, no tantrums. Swap sizes, strokes, or ports and the answer is always “Sure, let’s do it.” Day after muddy day she murmurs, “Push deeper, I’ve got the river,” and the crew quits worrying about tomorrow. Application scenes:
Picture dawn on a cutter-suction rig: big heart, gentle hands, she lowers the draghead through silt and coral, sucking up treasure while herons watch. Or a harbor cleanup where she folds small to snake between barges, then stretches tall to lift debris and dreams. From canal restoration to offshore mining, she’s the patient heartbeat turning murky water into clear passage—and tired crews into believers.

Application	Engineering machinery, mine, shipping, metallurgy, water conservancy, offshore, agriculture, etc.
Seal	Parker, Merkel, NOK, Hallite,etc.
Paint	Red, Grey, Yellow, Black, etc.
Material	St52, CK45, 4140, Duplex2205, Stainless Steel 304/316, etc.
Certificate	ABS, Lloyds, SGS, etc.
Package	Bubble-wrap packing, then in wooden case.
Color	choose the color according to customer requirement
Core components	Bearing,Pressure vessel,Pump
Is it a standard part?	Nonstandard
Structure	Piston Type, Plunger Type, Telescopic Type,
Power	Hydraulic & Pneumatic
Brand	Guoyue
Sample	Available