Blasthole Dewatering Systems Inc

Paul Kunze, doing business as BDS Inc, has been manufacturing and marketing this pneumatic displacement blasthole dewatering pump to quarries, mines and civil engineering projects around the world since 1992.

This simple, effective and inexpensive device, is available in a range of sizes that will quickly remove water from holes from as small as 2-1/2" (63mm) in diameter, through holes in the 7" (178mm) range, to depths approaching 130' (40m) deep.

It’s easy; the entire light­weight body and sleeve assembly, with the intake hose sus­pended below, is low­ered into the blasthole to the water level. Com­pressed air is used to inflate the flexible rubber sleeve, thereby expand­ing it to form a seal in the hole. Pressurized air is then automati­cally divert­ed to the closed chamber which has been created below the sleeve. This pressure displac­es the water and quickly forces it into the intake line, up through the center of the pump body, and on out the discharge hose to the surface. After the water in the hole is re­moved, the pump is imme­di­ately with­drawn. The dewatered hole can then be primed and loaded with the appropri­ate explo­sives.