Description The Afri Dev Pump is a conventional

Description The Afri. Dev Pump is a conventional lever action hand pump that is classified as a VLOM (Village Level Operation and Maintenance) pump. Main Features • • Maintenance costs ~$83/year; pump lifetime is ~15 years Requires minimum tools for operation and maintenance Hook-and-eye connecting rods: easy to install /maintain Cylinder can be serviced without removing riser pipes Below-ground assembly is corrosion-resistant Bearings are made of plastic: easy to replace Configuration includes an “open top” cylinder: piston can be removed from cylinder without dismantling rising main. • The foot valve is retractable with a fishing tool. Technical Data Well Type 100 – 150 mm borehole or dug well Space required 2 – 3 m 2 Construction Modular; six assemblies Pump Body Fabricated mild steel (MS), galvanized corrosion-resistant Cylinder (� ) Direct action reciprocating (50. 0 mm) Maximum stroke 225 mm Discharge at 10 m head at 15 m head at 20 m head at 30 m head With a 75 watt input, approximately: 1. 4 m 3/hour 1. 1 m 3/hour 0. 9 m 3/hour 0. 7 m 3/hour Pumping Lift 10 – 45 metres Operating depth 25 – 45 metres Ideal speed 40 strokes per minute Output 1, 200 litres per hour , at 40 strokes per minute Operating mechanism Manually operated handle Connecting rods 10 mm (� ) welded hook-and-eye and nitrile rubber centralizers Weight 50 kilograms Riser pipes 50 mm (� ) with pipe centralizers (stainless steel or PVC pipes possible) Potential Application School water supply, community water supply in a rural area Population served Approximately 300 people (30 – 50 households) References 1. Span Pumps Pvt Ltd. Hand Pumps. Span Pumps Private Limited. [Online] Span Pumps Pvt Ltd. , 2008. [Cited: 04 29, 2010. ] http: //www. spanpumpsindia. com/handpumps. html. 2. RWSN. Afri. Dev Pump. RWSN: Rural Water Supply Network. [Online] 4 teamwork, 02 06, 2009. [Cited: 04 29, 2010. ] http: //www. rwsn. ch/prarticle. 2005 -1025. 9856177177/prarticle. 2005 -1026. 2582788867/prarticle. 2008 -1204. 2105225472/prarticle. 2009 -0206. 9581575564. Please note: Some technical specifications may have been modified for this exercise