Oem High-Temperature Sealing Hydraulic Cylinder 80-56-90 with Water-Cooled Circulating for Extreme Conditions Telescopic Multi-Stage Cylinder Classification 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 cool-headed hero when the world around her is on fire. The built-in water jacket keeps the seals as chill as a mountain stream, so they never melt, crack, or cry. Each telescopic stage kisses the next like old friends, gliding out smoothly instead of jerking, saving your nerves and your cargo. OEM fit means no wrestling or shimming—she slides in like the last puzzle piece, ready to work overtime without a single whimper. In the harshest heat she still whispers, “Relax, I’ve got you,” and you suddenly believe machines can have hearts. Application scenes:
She shines where the sun feels like a blowtorch—steel mills glowing red, desert drilling rigs where mirages dance, or foundries where slag splashes like angry fireworks. Think of a long-reach garbage truck squeezing down narrow alleys in equatorial noon, or a mining scoop crawling inside a volcano-hot pit. From offshore cranes lashed by salty steam to wildfire-fighting bulldozers carving firebreaks, this cylinder stretches, cools, and protects. Any place sweat turns to vapor and metal usually screams, she simply breathes, lifts, and lets humans keep dreaming big under the wildest skies.

item	value
Warranty	1 Year
Showroom Location	not have
Brand Name	Guoyue
Place of Origin	China
	Jiangsu
Pressure	1MPa
Structure	V
Weight	27
Power	10MPa
Dimension(L*W*H)	500*140*140mm
Rod Diameter	56mm
Maximum Stroke	90mm
Outer Tube Diameter	100mm
Inner Tube Diameter	80mm
Product name	Hydraulic Cylinder
Material	Stainless Steel
Usage	Machinery