Difference between revisions of "Rope/elephant pump"
(→External links) |
|||
| Line 12: | Line 12: | ||
! style="background:#ffdead;" | Disadvantages | ! style="background:#ffdead;" | Disadvantages | ||
|- | |- | ||
| − | | valign="top" | | + | | valign="top" | Significantly cheaper than piston pumps. <br> |
| − | + | Easy to maintain. | |
| − | | valign="top" | | + | Easy to train on maintenance. |
| − | + | | valign="top" | Not all introduction programs have been successful.<br> | |
| − | |||
|} | |} | ||
| Line 22: | Line 21: | ||
== Capacity == | == Capacity == | ||
| − | + | 40 litres / min from 10 meters depth. | |
| − | |||
== Costs == | == Costs == | ||
| − | * | + | * US$ 20-120 depending on model. |
== Applying conditions == | == Applying conditions == | ||
| Line 42: | Line 40: | ||
* Evaluations [http://www.irc.nl www.irc.nl ] | * Evaluations [http://www.irc.nl www.irc.nl ] | ||
* Africa [http://www.pumpaid.org www.pumpaid.org ] | * Africa [http://www.pumpaid.org www.pumpaid.org ] | ||
| − | * General info [http://www.ropepump.com www.ropepump.com] [http://www.ropepumps.org www.ropepumps.org] | + | * General info [http://www.ropepump.com www.ropepump.com] |
| + | * How to build [http://www.ropepumps.org www.ropepumps.org] | ||
Revision as of 11:45, 17 July 2007
For wells down to 35 m, rope pumps are often 5 times cheaper and more Rotating movement (constant force 5-10 Kg.m) sustainable than piston pumps. Evaluations show that rope pumps on communal wells are being maintained by the users, if introduced properly. 90% Of rope pumps remain operational, even after many years. Continous water flow Because of its low cost, the pump is also popular for domestic use. (1-2 m/s) A survey among 5,025 rural families in Nicaragua indicates that a Schematic PVC pump tubes drawing of a rope pump increases income, even if used for domestic purposes (5-10 Kg) rope pump only. Families with a pump earn US$ 220 per year more than Low pressure in all parts families without a pump. In Nicaragua the pumps are now being (0, Kg/cm) produced commercially by 20 workshops. Few, non-corroDifferent models of Rope pumps were introduced in Africa.This sive pump parts introduction has not always been successful: in some projects over 80% of the pumps do NOT work! However, with the "right" models and the "right" user training, also 90 % remain in operation in Africa, as the Victory model in Ghana and the Elephant model in Zimbabwe have proved. (PE pistons, rope, concrete guide block)
| Advantages | Disadvantages |
|---|---|
| Significantly cheaper than piston pumps. Easy to maintain. Easy to train on maintenance. |
Not all introduction programs have been successful. |
Capacity
40 litres / min from 10 meters depth.
Costs
- US$ 20-120 depending on model.
Applying conditions
- Numbers: 50,000 in Nicaragua, 20,000 in Mexico, Honduras, Guatemala, Ghana, Zimbabwe, Tanaznia, Senegal.
- Yield: 40 litres/min from 10 m depth.
- Range of depth: 1-35 meter (60 m with two cranks).
- Application Communal wells, houshold, irrigation.
- Initial cost: US$ 20-120 depending on model.
- Cost of introduction: US$ 10,000-20,000 per project, including 20 pumps, engineering and hands-on training. US$ 60,000-100,000 per project, including 1,000 pumps, production workshop and hands-on training.
External links
- Evaluations www.irc.nl
- Africa www.pumpaid.org
- General info www.ropepump.com
- How to build www.ropepumps.org
