Hydraulic cylinder used for hydraulic hoist cylinder ZLP066

Hydraulic cylinder used for hydraulic hoist

Eternal company specialize on the design and manufacturing heavy duty hydraulic cylinder used for hydraulic hoist .And Eternal has accumulated rich experience and knowledge on such hydraulic cylinder ,so many heavy duty hydraulic cylinders have been applied on many hydraulic hoist all over the world .

1. Hydraulic cylinder application range .

• Lifting Gate
• Dam gate
• Hydraulic power station            

2. Design

 

Not only we could manufacture all kinds of heavy duty hydraulic cylinder on hydraulic hoist according to the drawing from customers, but also we could make a design according to customers’ requirements. If you require our engineer to make a design, please 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

4.1.1   According to the cylinder pressure and inside diameter size ,different steel tube Would be chose .

       1.ID ≤300mm , cold rolled precision seamless tube would be chose

       2.300mm≤ID ≤500mm , hot rolled seamless tube would be chose

       3.500mm≤ID ≤1000mm, forged tube would be chose

4.1.2 Cylinder tube steel grade : SAE1020 , SAE1045 ,27SiMn , S355JR ,S355J2G3,St52-3 ,SUS304 ,SUS316L etc .

4.1.3 Cylinder tube inside boring and honing , roughness R0.2-R0.3,

4.1.4 Cylinder tube inside chromating : if necessary ,tube inside chromating could be applied .

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

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

4.2.2 Piston rod chromating and surface hardness .

Eternal company ensure that every piece piston rod would be surface hardened before chromating , surface hardness is HRC55-60 , Chromating film thickness is 0.03-0.04mm if there is no other specific requirements .

4.3 Seal ring and O ring

According to the customers’ requirements and working condition , eternal company would choose suitable seal ring kit , seal ring brand include :Parker , Merkel , NOK , Guangzhou Rubber institute , Taiwan brand etc . Eternal company 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 .Eternal company ensure 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 .

 
Company Information

 

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