It is a kind of high air pressure DTH Hammer without footvalve, our newest design. It is also one of the most advanced DTH Hammers in the world.
It has the following advantages:
1. Out of the trouble of foot valve fracture and expansion and contraction.
2. Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life, easy and cheap maintenance.
4. Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.
Length(exclude bit) | Weight(exclude bit) | External Diameter | Bit Shank | Hole Range | Connection Thread |
1011 mm | 43.20 kg | Φ99 mm | Cop44 DHD340 | Φ110mm _ Φ135mm | API 2 3/8'' Reg |
Working Pressure | Impact rate at 0.5 MPa | Recommended Rotary Speed | Air Consumption |
1.0 MPa | 1.8 MPa | 2.4 MPa |
1.0-2.5 MPa | 30 Hz | 22-35 rpm | 6m3/min | 10m3/min | 15m3/min |