Difference between revisions of "Walami pump"
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| − | [[Image:lever action icon.png|right| | + | [[Image:lever action icon.png|right|80px]] |
| − | [[Image:walami pump.jpg|thumb|right| | + | [[Image:walami pump.jpg|thumb|right|200px|The walami pump. Photo: [http://www.rural-water-supply.net/en/implementation/handpump-overview/walami-pump RWSN.]]] |
| − | [[Image:walami pump2.jpg|thumb|right| | + | [[Image:walami pump2.jpg|thumb|right|200px|The walami pump. Photo: [http://www.rural-water-supply.net/en/implementation/handpump-overview/walami-pump RWSN.]]] |
| − | __NOTOC__ | + | __NOTOC__ <small-title /> |
The Walimi Pump is a conventional lever action handpump for lifting water from low to medium deep wells. It is designed for small to medium sized communities of up to 250 persons. Besides the 3” (Ø76 mm) cylinder configuration, recommended to maximum lift of 25 m, a 2” version (Ø50 mm) cylinder is used for lifts up to 40 m. The riser pipes are made of PVC-HI and are connected by threads. The bearings for the lever action are made of specially treated hardwood. | The Walimi Pump is a conventional lever action handpump for lifting water from low to medium deep wells. It is designed for small to medium sized communities of up to 250 persons. Besides the 3” (Ø76 mm) cylinder configuration, recommended to maximum lift of 25 m, a 2” version (Ø50 mm) cylinder is used for lifts up to 40 m. The riser pipes are made of PVC-HI and are connected by threads. The bearings for the lever action are made of specially treated hardwood. | ||
The Walimi Pump is a public domain pump defined by [http://www.rural-water-supply.net/en/implementation/handpump-overview/walami-pump RWSN specifications]. This pump is corrosion resistant, is quite easy to install and it has very good potential for community-based maintenance. | The Walimi Pump is a public domain pump defined by [http://www.rural-water-supply.net/en/implementation/handpump-overview/walami-pump RWSN specifications]. This pump is corrosion resistant, is quite easy to install and it has very good potential for community-based maintenance. | ||
| − | ==Suitable conditions== | + | ===Suitable conditions=== |
Distribution: ~ 8,000 in Tanzania. | Distribution: ~ 8,000 in Tanzania. | ||
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| − | ==Construction, operations and maintenance== | + | ===Construction, operations and maintenance=== |
Pump head, handle and pump stand are made of galvanized steel, pump rods are of stainless steel, rising main and cylinders are of PVC-HI pipes and the “down-hole components” are made of plastic, stainless steel and rubber components. This makes the pump totally corrosion resistant. | Pump head, handle and pump stand are made of galvanized steel, pump rods are of stainless steel, rising main and cylinders are of PVC-HI pipes and the “down-hole components” are made of plastic, stainless steel and rubber components. This makes the pump totally corrosion resistant. | ||
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This pump has an excellent “Community Management Potential”; it is reliable, easy to repair by a village caretaker. | This pump has an excellent “Community Management Potential”; it is reliable, easy to repair by a village caretaker. | ||
| − | ==Manuals, videos | + | ===Manuals, videos and links=== |
* E.C. Mizray, G. M. Kawa, K. Erpf. [http://www.rural-water-supply.net/en/resources/details/344 Walimi Handpump Hand Book for Water Users.] RWSN (incl. HTN), 2002. | * E.C. Mizray, G. M. Kawa, K. Erpf. [http://www.rural-water-supply.net/en/resources/details/344 Walimi Handpump Hand Book for Water Users.] RWSN (incl. HTN), 2002. | ||
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* E.C. Mizray, G. M. Kawa, K. Erpf. [http://www.rural-water-supply.net/en/resources/details/346 The Walimi Handpump - Manufacturing Guidelines]. RWSN (incl. HTN), 2002. | * E.C. Mizray, G. M. Kawa, K. Erpf. [http://www.rural-water-supply.net/en/resources/details/346 The Walimi Handpump - Manufacturing Guidelines]. RWSN (incl. HTN), 2002. | ||
| − | ==Acknowledgements== | + | ===Acknowledgements=== |
* [http://www.rural-water-supply.net/en/implementation/handpump-overview/walami-pump Implementation • Handpump Technology: Walami Pump]. RWSN. | * [http://www.rural-water-supply.net/en/implementation/handpump-overview/walami-pump Implementation • Handpump Technology: Walami Pump]. RWSN. | ||
Revision as of 06:37, 2 October 2013
The Walimi Pump is a conventional lever action handpump for lifting water from low to medium deep wells. It is designed for small to medium sized communities of up to 250 persons. Besides the 3” (Ø76 mm) cylinder configuration, recommended to maximum lift of 25 m, a 2” version (Ø50 mm) cylinder is used for lifts up to 40 m. The riser pipes are made of PVC-HI and are connected by threads. The bearings for the lever action are made of specially treated hardwood.
The Walimi Pump is a public domain pump defined by RWSN specifications. This pump is corrosion resistant, is quite easy to install and it has very good potential for community-based maintenance.
Suitable conditions
Distribution: ~ 8,000 in Tanzania.
Ø3” cylinder for depths of 5-25 m. Ø2” cylinder for depths of 20-40 m.
| Cylinder diameter: | 50.0 mm or 62.5 mm |
| Maximum Stroke: | 170 mm |
| Approx. discharge (75 watt input): | at 5 m head: 2.0 m³/hour
at 10 m head: 1.3 m³/hour |
| Pumping lift: | 2 - 40 m |
| Population served: | ~ 250 people |
| Households: | 25 - 30 hh |
| Based on water consumption of: | 15 - 20 l/per capita |
| Type of well: | borehole or dug well |
Construction, operations and maintenance
Pump head, handle and pump stand are made of galvanized steel, pump rods are of stainless steel, rising main and cylinders are of PVC-HI pipes and the “down-hole components” are made of plastic, stainless steel and rubber components. This makes the pump totally corrosion resistant.
All steel parts of this pump have a potential for local manufacturing. Local companies who manufacture PVC-HI pipes and have the knowledge of machining engineering plastics are also able to produce the “down-hole components”. The cost of the tooling requirement is substantial and therefore the number of manufacturer will be limited.
The installation of the Walimi Pump is not difficult and does not need any lifting equipment.
This pump has an excellent “Community Management Potential”; it is reliable, easy to repair by a village caretaker.
Manuals, videos and links
- E.C. Mizray, G. M. Kawa, K. Erpf. Walimi Handpump Hand Book for Water Users. RWSN (incl. HTN), 2002.
- E.C. Mizray, G. M. Kawa, K. Erpf. Walimi Handpump Specification. RWSN (incl. HTN), 2002.
- E.C. Mizray, G. M. Kawa, K. Erpf. The Walimi Handpump - Manufacturing Guidelines. RWSN (incl. HTN), 2002.
