The “DTH” is the abbreviation of “Down The Hole””. A rotation drill rig, air compressor and the “DTH drill string” are the essential unit for DTH drilling while the “DTH drill string” is always made up of DTH drill rods, DTH hammer and DTH bits. As one of key component, the DTH hammer acts as a role of converting the air pressure to the impact energy, simultaneously transferring impact energy and rotation force to DTH bits. The DTH hammer is a component of the DTH drilling tools and belongs to the working device of the DTH drilling tools. DTH hammer is divided into low air pressure DTH hammer, medium air pressure DTH hammer and high air pressure DTH hammer，which are used for blast hole drilling and water well drilling project,mine drilling etc.. High Air Pressure DTH Hammer (with foot valve) It is a kind of valveless high air pressure DTH hammer with foot valve. Good sealabIlity, no water and cuttings entering into hammer in water exists drilling.
