It has following advantages:

• The pressure is between 0.6 MPa and 1.75 MPa.
• Valveless hammers.
• Simple structure, easily to assemble and to disassemble, long lifespan.
• Higher impulse and faster drilling rate.
• Lower air consumption and lower oil consumption. A hole can be drilled on the check valve to provide more efficient cutting discharge.
• Especially suitable for quarrying.