| Hydraulic Boat Lifting Knuckle Boom Marine Crane |
Thanks to their outstanding flexibility in radius, our knuckle boom cranes make it easy and safe to load and unload vessels and handle different materials.
Relong cranes are a preferred solution for heavy lifting of provision, service equipment, or container and cargo handling.

2. Features:
--- Four connected bar mechanisms: Higher lifting capacity with.
--- Two folding arms: Can tit upward(negative elevation angle)&enter lower space for lifting.
--- The second section knuckle boom: Cylinder with the reverse arrangement and adopt the flange connection balance value with higher reliability to reduce the leakage point.
--- Rack cylinder: Adopted inclined arrangement, the boom in folding state to make full use of space, compact overall structure.lower center of gravity and vehicle driving stability.
3. Technical Parameters & Selections:
Max L Capacity | Max L Moment | Recommend Power | Hydraulic Flow | Hydraulic Pressure | Oil Tank Capaticy | Installation Space | Self Weight | Rotation Angle | |
Kg | TON.m | KW | L/min | MPa | L | mm | Kg | ° | |
| SQ1ZA2 | 1000 | 2.2 | 7.5 | 15 | 18 | 25 | 550 | 500 | 330 |
| SQ2ZA2 | 2000 | 4.2 | 9 | 20 | 20 | 25 | 680 | 620 | 370 |
| SQ3.2ZA2 | 3200 | 6.8 | 14 | 25 | 25 | 60 | 850 | 1150 | 400 |
| SQ4ZA2 | 4000 | 8.4 | 14 | 25 | 26 | 60 | 850 | 1250 | 400 |
| SQ5ZA2 | 5000 | 10.5 | 22 | 35 | 28 | 100 | 1050 | 1850 | 400 |
| SQ6.3ZA2 | 6300 | 13 | 22 | 35 | 28 | 100 | 1050 | 2050 | 400 |
| SQ6.3ZA3 | 6300 | 13 | 22 | 35 | 28 | 100 | 1050 | 2200 | 400 |
| SQ8ZA3 | 8000 | 16 | 25 | 40 | 28 | 160 | 1150 | 2850 | 390 |
| SQ10ZA3 | 10000 | 20 | 25 | 40 | 28 | 160 | 1200 | 3250 | 380 |
| SQ12ZA3 | 12000 | 27 | 30 | 55 | 28 | 160 | 1400 | 3950 | 360 |
| SQ16ZA3 | 16000 | 40 | 37 | 63 | 30 | 240 | 1500 | 4950 | 360 |
| SQ16ZA4 | 16000 | 40 | 37 | 63 | 30 | 240 | 1500 | 5140 | 360 |
| SQ20ZA4 | 20000 | 45 | 37 | 63 | 30 | 260 | 1500 | 6300 | 360 |
| SQ25ZA6 | 25000 | 62.5 | 50 | 80 | 31.5 | 320 | 1500 | 7850 | 360 |
4. Application scenario:
On land
Marine Vessels
Dredger
Workboat
Multifunction dredger

5. Company profile :
Qingdao Relong Technology specializes in producing truck-mounted cranes integrating design, manufacturing, and sale. The factory building covers an area of 10,000-plus square meters. The top-seller products of the company are SQ1-8Q25 0.8-25 ton series truck cranes, with knuckle boom and telescopic boom besides the main products above, we also provide other crane-related products like track cranes, marine cranes and timber cranes, and some other deformed products.
We have a first-class technical research and development team, strong technical innovation and product development capabilities, highlights the product development philosophy of "safety, pro-environment, fashion. Leading", builds the product R&D platform which is marked by a three-dimensional design system, mechanical analysis system with independent knowledge products and modular expert database. Firmly occupy the commanding height of the product technology. to lead the industry development trend, and promote the healthy and sustainable development of the industry.
As the manufacturer, hope we can offer a competitive price and good quality to you.

7.Happy visiting time with customers:

8. FAQ:
--Within 15-20 days after receiving the deposit.
2. How to install the machine?
--If need seller's installation help, the seller will send one (1) technologist to Your workplace to conduct installation and
train 3-5 workers to operate the machine, buyer shall arrange for at least 3-5 workers to work with the engineers.
3. How long is the equipment warranty period?
-- We provide a 12-month warranty.
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