The impact frequency of reverse circulation rig is 40 times/min, the main and the auxiliary hoisting capacity is 30kN, the motor power is 45kW, not include 6BS pump.
The reverse circulation pump unit is 3PNL and 6BS pump, can be equipped with hydraulic step displacement. In addition to the impact of the drill tip wear-resistant materials, the remaining 50mm welded steel plate, can also be equipped with a variety of specifications drill.
It is suitable for complex foundation engineering construction, such as soil layer, cemented gravel and rock socketed, and it is widely applied to bridge bored pile and underground diaphragm wall foundation engineering.
| Model | HF-250 | |
| Drill hole depth (m) | ≤300 | |
| The hole diameter (mm) | 350-1200 | |
| Spindle speed (r/min) | 9 | |
| Spindle power (kw) | 7.5*2 | |
| The spindle torque (N•m) | 22000 | |
| Hoist lifting force (kg) | 3000*6 | |
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