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:
Meet the gentle giant who never slams the door. The built-in “Buffer 180” cushions every end-stroke like a loving hand catching a falling cup—no clang, no cracked dies, just a soft sigh of relief. OEM dimensions slide straight into your press or gate frame like they were always meant to be there, saving you from midnight cursing and extra shims. High-temp seals laugh at heat, while the fat 110 mm rod stands unbent under surging loads. In short, it’s the strong, silent friend who lets you hit “start” with your eyes closed and your heart calm. Application scenes :
Picture a riverside floodgate at dusk: this cylinder breathes it open inch by inch, giving worried townsfolk a quiet night’s sleep. Or step into a clattering press shop where sheet-metal dragons are tamed—each stroke ends in a velvet hush instead of a deafening bang. From hydroelectric dam gates yawning against mountain snowmelt to brick-yard kilns cycling doors in desert heat, it keeps the rhythm smooth, the workers smiling, and the world turning without a single jolt.

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