80mm Bore Hydraulic Cylinder 45-350mm Stroke Stainless Steel

Customized 80 45-350 Deep-sea Operation Titanium Alloy Stainless Steel High-pressure Sensor Valve Group Hydraulic Cylinder Dredging Equipment Cylinder 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 calm hero born for the abyss. A titanium-alloy body shrugs off salt and pressure like a second skin, while a stainless-steel heart laughs at rust. The 80 mm bore and 45-350 mm telescopic stroke fold small yet reach far, giving dredge arms the grace of a dancer. A built-in sensor valve group whispers exact depth and load to the surface, so operators feel the mud, not the mystery. OEM custom means she bolts straight in, no shims, no midnight cursing. In crushing dark and biting cold, she keeps murmuring, “Steady, I’ve got the deep.” Application scenes:
Picture midnight on a cutter-suction dredger: this cylinder pushes the draghead through coral sand, guiding treasure-grade minerals into waiting hoppers while stars shimmer on black water. Or a deep-sea trenching ROV carving cable routes two miles down, its titanium arm kissing the seabed without a tremor. From offshore wind-farm scour protection to manganese-nodule harvesters gliding above abyssal plains, she’s the quiet pulse that turns crushing pressure into gentle progress, letting tomorrow’s data—and today’s dreams—flow safely home.

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