ETERNAL company design and manufacture heavy duty hydraulic cylinders that covering 1.1 oil field drilling rig 1.2 rotary drilling rig 1.3 down the hole drilling rig
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: 1. Rated pressure 2. Working pressure 3. Test pressure 4. Working condition and environment ,for example ,temperature ,working frequency 5. Pulling force ,and return stroke force 6. Pulling and return speed 7. Assembly size 8. Seal ring requirements .For example , brand ,seal material etc . 9. Tube and piston rod raw material requirements 10. Piston rod surface treatment requirements, for example chromating film thickness , Surface hardness etc . 11. Painting and other spare parts requirements .
3.Manufacturing capability and cylinder size range
Cylinder bore diameter
Max lifting capability
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 choosed . 1. ID ≤300mm , cold rolled precision seamless tube would be choosed 2. 300mm≤ID ≤500mm , hot rolled seamless tube would be choosed 3. 500mm≤ID ≤1000mm, forged tube would be choosed 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 morelifetime , 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 .
Packaging & Shipping
Jiangyin Eternal Heavy Industry Co.Ltd was established in 2008.Our products mainly includeheavy duty hydraulic cylinder,hydraulic baler, hydraulic shear etc. . We specialize on design and manufacture heavy duty hydraulic cylinders and high
precision AGC servo cylinders.Our hydraulic cylinders are widely used in different industry fields including:construction machinery,mining machinery,hydro~power project,offshore drilling platform,steel plant equipment , marinemachinery,hydraulic lifting systemetc. We have gained ten patents for our hydraulic cylinders. In 2008, our servo cylinders with cylinder bore 950mm for steel mill were exported to Poland.In 2009, our hydraulic cylinders with stroke 10 meters were exported to Pakistan for water conservancy project. In 2016,cyliner with weight 90tons has been exported to Russian sucessfully .Our hydraulic cylinder range: Bore:1000mm, Stroke:12 meter, testing pressure:50MPa We could manufacture all kinds of hydraulic baler and hydraulic shear , our machines have been exported to many countries , and passed through CE certification .
We specialize on manufacturing all kinds of raise boring machine drilling tool and spare parts, we also specialize on manufacturing other drill rig drilling tool and spare parts, TBM disc cutter , cutter head. They have been exported to many countries , max reamer head could reach dia10000mm , disc cutter size is from 6"~19".
Eternal company would devote to supply first rate equipment and provide total solutions to our customer. In the past ten years, we devoted ourself to continuous market expanding and the researchand development of new products. Till now,our products have been export to nearly 50 countries and own good reputation from our customers .