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Rope Pump (Nicaragua)
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The Rope Pump features a unique design in which small plastic pistons are lined up on a rope. The distance between the pistons is approximately 1 m. The drive wheel is crank operated and pulls the rope through a plastic rising pipe. The drive wheel consists of cut old tires. A ceramic guide box at the bottom of the well leads the rope with the pistons into the rising pipe.
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Technical data
Piston nominal dia.: 1”, ¾” or ½”,
Approx. discharge (75 watt input):
at 10 m head: 1.4 m³/hour,
at 15 m head: 1.1 m³/hour,
at 20 m head: 0.7 m³/hour,
Pumping lift: 0 - 30 m,
Population served: - 70 people,
Households: 3 - 10 hh,
Water cons.: 15 - 20 l/per capita,
Type of well: mainly dug wells.
Material
Pump stand made of painted steel rods or pipes, crank made of painted steel pipe, cover of galvanized and painted MS sheet, drive pulley of rubber and mild steel, pistons of plastic, guide box of ceramic, concrete and PVC, rising main of PVC-U pipes. The Nicaragua Rope Pump is reasonably corrosion resistant.
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Local manufacturing
The Rope Pump has an excellent potential for local manufacturing.
Installation
The installation of the Rope Pump is easy. It can be done by trained area mechanics. No lifting tackle and no special tools are needed.
Maintenance
The rope pump has an excellent “Community Management Potential”. Torn or broken ropes can be replaced without special tools. A village caretaker is able to perform all maintenance operations required.
Remarks
This rope pump is usually installed in dug wells. Even though it is not limited in pumping lifts, the major application range is up 15 m. The Rope pump is not designed for a high daily output, but rather a family or small community pump. Models exist for family use as well as for community use.
Price (approx): Depending on local conditions,
Distribution: ~30,000 in Nicaragua.
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