DEWATERING PUMP: 3/4"

Fits hole size: 2.5" - 4.25" (depends on size of sleeve that you request). Complete pump includes: 1 - steel pump body, 3- replaceable rubber sleeves, 50ft air hose, 50'exhaust hose, 8ft lower exhaust hose, 1 - regular assembly. Uses low pressure, low volume for operation.

This makes an effective blasthole dewatering system designed specifically for that purpose, thats found in rock excavation projects, at mines and quarries all over the world. This product is designed around a very basic mechanical principle. When a closed chamber is pressurized, any fluid that it contains will be quickly removed if an intake line that's open to the outside is positioned near the bottom of the container. Huge amounts of liquid are moved in this fashion every day in industrial applications all over the world by the utilization of low pressure air in barrels and tanks
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In our application, the drill hole serves as the container and the pump as the seal. The assembly consists of: 1 a stainless steel pump body, 2 an expandable and replaceable rubber sleeve, 3 a discharge hose, 4 an intake hose with, 5 a stainless steel tube screen, 6 air supply hose, 7 pressure regulator, 8 an operating valve, and 9, assorted fittings.

The pump is available in a complete range of sizes to dewater holes from as small as 2-1/2" (63mm) in diameter, through holes in the 8-1/2"(215mm) range, to depths approaching 150' (45m) deep.

Its use is simple. The entire lightweight body and sleeve assembly, with the intake hose suspended below, is lowered into the blasthole to the water level. A valve is opened and compressed air inflates the sleeve, thereby expanding it to form a seal against the wall of the hole. Pressurized air is then automatically directed into the closed chamber which has been created below the sleeve. This 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. Because this action occurs within seconds, the compressed air flowing into the hole displaces and lifts the fluid to the surface, rather than to forcing it back into the sur rounding material. After the water in the hole is removed, the pump assembly is immediately withdrawn. The dewatered hole can then be primed and loaded with the appropriate explosives.