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Hydraulic cylinder for Arm

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.

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

2.Design

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.