PD-1 GRH Gunning Rig 
    PD-1/GRH Gunning Rig
    For use with packaged, pre-blended materials for shotcrete and
  refractory applications.
  - Provides the opportunity to add a controlled amount of moisture to
    the bagged material as it is transported and fed into the gun.
 
  - The addition of moisture, as much as 60 percent of the total water
    required, and the mixing action of the auger starts the hydration
    process long before the material reaches the nozzle.
 
  - The controlled design or prebagged mixes ensure the amount of
    water added at the nozzle, in the split second that the material
    passes through the water ring,
 
  - produces proper, in-place shotcrete.