This high air pressure DTH hammer working with foot valve.

It has following advantages:

• Simple design of the piston, long life span.
• More efficient energy transfer, faster drilling speed, lower air consumption and lower oil consumption.
• Fewer internal parts, simple structure, long life span, less failure and easier to maintain because all the parts are heat treated.
• Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multiple steps thread.