SEM Concrete Placer Pumps
SEM Concrete Placer Pumps are principally used for conveying concrete.
They are also used for conveying mortar, mud, sand, tailings and many types of material.
Depending on the material and the transport distances involved, SEM can be used as a:
PUMP - continuous flow in a full pipeline - only interrupted by the filling interval. Because of the friction and the specific weight of the material to be conveyed - this will limit transport distances (see specification page below for concrete).
PNEUMATIC PLACER - plug flow - one or several batches at a time. This removes the limitations caused by friction and specific weight of the material to be conveyed. Distances and heights are greatly increased, only limited by practical considerations. In the case of concrete, certain adjustments should be made to the mix to enable it to withstand the segregation forces caused by plug flow and high speed. Distances negotiated successfully to present date are up to 400m horizontal and up to 600m down decline shafts with dips varying between 11 to 45 degrees.
SEM Placer Pumps are used in
- MINES for
- placing concrete in box fronts, ore passes, dam walls, settlers,foundations, support through bad ground, concrete plugs etc. - Conveying mud - Conveying ore spillage, sand, tailings and similar. - BUILDING & CONSTRUCTION for
- Pumping concrete into foundations, slabs and general building structures. - Pumping concrete in tunneling applications. - SPECIAL APPLICATIONS for
- Placing concrete during restoration or repair of old underground pipelines. - Placing concrete for plugging up old access ways or pipelines. - Repair work to marine structures.
LOW CAPITAL COST in comparison to conventional piston driven pumps (Normally 1/8 to 1/10 of the capital cost).
NO MOVING PARTS in the pump reduces the danger of mechanical breakdown and results in negligible maintenance and minimum spare part consumption.
SIMPLE, ROBUST DESIGN will stand up to the worst site conditions.
LOW AIR CONSUMPTION is achieved by the controlled applications of compressed air (when used as a pump).
NEGLIGIBLE WEAR on pumps and pipes is due to the smooth flow of concrete (when used as a pump).
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