China Hjg Hql5 DTH Hammer Ql50

It is a kind of valveless high air pressure DTH Hammer with foot valve.
It has the following advantages:
1. Valveless air distribution. More reliable.
2. Simple design of the piston, long life.
3. More efficient energy transfer, faster drilling speed, lower air consumption and lower oil consumption.
4. Fewer internal parts, simple structure, longer life, less failure and easier to maintain because all the parts are heat treated.
5. Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multi-step thread.

Length(exclude bit)Weight(exclude bit)External DiameterBit ShankHole RangeConnection Thread1156 mm73.00 kg Φ125 mm QL50Φ135mm _ Φ155mm API 3 1/2'' RegWorking PressureImpact rate at 0.5 MPaRecommended Rotary SpeedAir Consumption1.0 MPa1.8 MPa 2.4 MPa1.0 - 2.5 MPa25 Hz20-35 rpm9 m³/min 15 m³/min23 m³/min