The hammer without footvalve is a new type of high pressure hammer which developed
by our company.It is one of the most cost-effective DTH hammer in China. It has the advantages 
with fast penetration,low air consumption,good stability and long service life.The advantages as follow, 
1 The structure is more simple, easy to maintain, less trouble.
2.This series hammer adopts a more reasonable structure design, the impact energy can be transmitted most effectively, then hammer with large impact power, low air consumption,high impact frequency and fast drilling speed.
3.The parts are all made of high-quality special steel, and the surface is hardened and the smoothness is improved,so can ensure the good wear resistance and long service life.
4.The piston is produced by imported materials and suitable heat treatment technology, ensure the more 
wear-resistant, and the pressure drops slowly