hydraulic cylinder Excavator Arm cylinder
- Category: >>>
- Supplier: Jiangsu Yingnaisi Machinery Manufacturing Co. Ltd.
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Product Overview
Description
JIANGSU YINGNAISI company design and manufacture heavy duty hydraulic cylinders that covering the following fields:
l hydraulic press cylinder l construction machinery cylinder l mining machinery cylinder l metallurgy machinery cylinder l water power project cylinder l marine hydraulic cylinder l servo hydraulic cylinder
YINGNICESI contributes to customer value through the study and development on top precision endurable hydraulic cylinder always. we become one of high-quality supplies of HYUNDAI Hydraulic Machinery in Changzhou.
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:
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
3.1 Cylinder bore diameter :max Ø1200mm 3.2 Cylinder length :10Meter 3.3 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 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
4.3 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 .
4.hydraulic cylinder quality guarantee system Program before Delivery 1. Trial Operation Test 2. Start-up Pressure Test 3 Pressure-Tight Test 4. Leak Test 5. Full Stroke Test 6. Buffer Test 7. Testing the Effect of Limit 8. Load Efficiency Test 9. Reliability Test
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Q: How long will it take to produce an order?
A: It is within 30days for the purchasing and production time with container
order and some days for the sample.
Q: What is your minimum order?
A: Usually 1 ton for each size, please contact us when you are trying to
purchase less than container load.
Q: What form of quotation do you offer?
A: FOB Shanghai/(China), CIF and CNF Your destination.
Q: What is your payment term?
A: Payment is 30% deposit, 70% before shipment or 70% L/C at sight for the
container order 100% T/T in advance for LCL order or the sample order.
We accept US dollar,Euro,GBP.etc.
Q: Does the sample for free or not?
A: The samples are free if they are common sizes, You need to pay the freight
charge.
Q: How do you guarantee the quality of the products?
A: All of our procedures are strictly operated under the ISO 9001, and there
are as many as 6 times of test during the production of each product to
ensure the quality.We have our own test centers, every tubes will be tested
under our testing equipment before package.
Q: How do you to package the product?
A: Internal wrapped with plastic foil, external wrapped with polywoven bags,
we use steel belt to pack the outside, polywooden cases or wooden boxes
for thin wall thickness can be offered if required.
Q: How about the Third Party Inspection ?
A: We have been working with DNV,TUV,SGS,BV,CO,etc.
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