20 Tons Construction Machinery Excavator NK621

Advantage:

1. High-end configuration·Excellent performance

NK621 is suitable for earth and stone construction projects such as municipal construction, highway bridges, housing construction, road engineering, farmland water conservancy construction, port construction and so on, it has features of good flexibility and maneuverability, low fuel consumption, high construction efficiency, large digging force, comfortable driving environment and wide range of application.

2. New generation·Environmental·Energy-saving·Large power engine

New generation environmental engine is adopted in this machine, which has both excellent environmental performance and large power, matched with ow fuel consumption design, operating costs are significantly reduced, and fuel consumption is reduced by 10% or less compared to previous generation of machine.

QSB high pressure common rail electronically controlled engine, precise control combustion, ensure economy, strong power, low fuel consumption, low emissions.

3. Pump : The main pump of international famous brand

The two-variable plunger pump, can ensure all single and compound operation, adopt the negative flow control system, the flow is large, the speed is fast, and can change the output flow at any time according to the actual use condition.

4. The main valve: International famous brand

It has the functions of the confluence of the bucket stem, the regeneration of the moving arm, the priority of turning and the linear walking loop.

5. Others: International famous brand or Zhongchuan axial piston motor with hydraulic brake, swing prevent valve, accurate positioning, long service life;Adopt high strength steel plate, high strength and light weight.

Specification: