Hydraulic Cylinder 

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Hydraulic cylinder for Arm

Not only we could manufacture all kinds of hydraulic cylinders according to the drawing from our customers,but also we could make a design according to customer's requirements.
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Product description

JIANGSU YINGNAISI company design and manufacture heavy duty hydraulic cylinders that coveringthe following fields:

  • hydraulic press cylinder
  • construction machinery cylinder
  • mining machinery cylinder
  • metallurgy machinery cylinder
  • water power project cylinder
  • marine hydraulic cylinder



Not only we could manufacture all kinds of hydraulic cylinders according to the drawing from our customers,but also we could make a design according to customer's requirements.If you require our engineer to make a design,pls advise us the following specification:

  • Rated pressure
  • Working pressure
  • Test pressure
  • Working condition and environment ,for example ,temperature ,working frequency
  • Pulling force ,and return stroke force
  • Pulling and return speed
  • Assembly size
  • Seal ring requirements .For example , brand ,seal material etc .
  • Tube and piston rod raw material requirements
  • Piston rod surface treatment requirements, for example chromating film thickness ,
  • Surface hardness etc.
  • Painting and other spare parts requirements.


3.Manufacturing capability and cylinder size range

  • Cylinder bore diameter :max Ø1200mm
  • Cylinder length :10Meter
  • Max lifting capability :50 Tons


4.Manufacturing and inspection

4.1.Cylinder tube size and choice

  • According to the cylinder pressure and inside diameter size ,different steel tube Would be choosed .
  • ID ≤300mm , cold rolled precision seamless tube would be choosed
  • 300mm≤ID ≤500mm , hot rolled seamless tube would be choosed
  • 500mm≤ID ≤1000mm, forged tube would be choosed
  • Cylinder tube steel grade : SAE1020 , SAE1045 ,27SiMn , S355JR ,S355J2G3,St52-3 ,SUS304 ,SUS316L etc.
  • Cylinder tube inside boring and honing , roughness R0.2-R0.3,
  •  Cylinder tube inside chromating : if necessary ,tube inside chromating could be applied


4.2 Piston rod is a very important part for hydraulic cylinder .

 Piston rod steel grade : SAE1045, 42CrMo4, SUS410 ,SUS420, SUS304, SUS316L


4.3 Seal ring and O ring

According to the customers’ requirements and working condition , we would choose suitable seal ring kit , . we would supply suitable seal solution for their customer so that hydraulic cylinder has more lifetime , easy maintenance and simple repairing.


4.4 Tube and flange welding

The welding on cylinder tube and flange would be Ultrasonic tested every time , the welding seam would be cleaned before machining .weensure that every welding seam has no any leak during lifetime


4.5 Assembly and pressure test

Before hydraulic cylinder is assemblied , every spare parts would be measured and cleaned .After hydraulic cylinder is assemblied , pressure test would be carried out one By one , eternal company ensure that testing pressure is higher 30%-50% than working pressure , and pressure holding time 30~60 minutes is necessary . Every piece hydraulic cylinder must be tested completely without any leak.


4.6 Painting and storage 

After hydraulic cylinder pass through pressure test , painting is necessary.


5.hydraulic cylinder quality guarantee system

Program before Delivery

  • Trial Operation Test
  • Start-up Pressure Test
  • Pressure-Tight Test
  • Leak Test
  • Full Stroke Test
  • Buffer Test
  • Testing the Effect of Limit
  • Load Efficiency Test
  • Reliability Test
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Contact Information

Panjia Industrial Concentration District, Wujin District, Changzhou, Jiangsu





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