DTH hammer QL series

QL series of high pressure wind tunnel DTH hammer QL series of high pressure wind tunnel DTH hammer without nylon tube Model：QL4/QL5/QL6/QL8/QL95 QL series DTH hammer is a kind of high air pressure DTH hammer without foot valve,and it is our newest design.It is also one of the most advanced DTH hammers in the world. It has following advantages: 1.Out of the trouble of foot valve fracture 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 span,easy and cheap maintenance. 4.Lower air and oil consumption.The oil consumption is about 10% lower than the one with foot valve.