Nothing mechanical in the hole, just the expandable rubber sleeve
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 sleeve, thereby expanding it to form a seal against the inside wall of the hole. Pressurized air is then automatically diverted out the bottom of the rubber bladder into the closed chamber which has been created below the sleeve. This air pressure displaces the water and forces it into the intake line, up through the center of the pump body, and on out the discharge hose to the surface. Because this action occurs within seconds, the volume of compressed air flowing into the hole is used to displace and lift the fluid from the hole, rather than to force it back into the surrounding material. After the water in the hole is removed, the pump is immediately withdrawn.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.
Old dewatering videos showing a variety of projects with different hole sizes
The pump is available in a complete range of sizes to dewater holes from as small as 2-1/2" (63mm) in diameter, thru holes in the 7" (178mm) range, to depths approaching 130" (40m).
Contact us to discuss your situation or place an order
Ph: 406 654 1727 email: firstname.lastname@example.org
Box 1160 Malta, MT 59538 USA