HR Series DTH Hammer, a kind of valve-equipped Low-Air-Pressure hammer with a single piston, a plate valve and a central exhaust structure.The compressed air is adopted as the driving force. To prevent dust pollution and get a better performance, some hjgh-pressure water may be added into the air for wet rock drilling. It is mainly featured in: 1.The strong energy of single impact and the low energy consumption in rock crushing; 2.The weight ratio of Piston and Bit almost Reaches 1:1 to provide long effective acting time, which leads to the improved efficiency in rock crushing and the extended service life of the drilling tool; 3. A good performance in central air exhaust and cuttings discharge, which reduces the repeated crushing of rock; 4.A check vlave device is available to drill holes finder water. The HR Series DTH Hammer, an ideal drilling tool, is widely used in such industries relating to energy,transportation,metallurgy,building etc.