1. The AfriDev Pump COST: $10,700
Description
The AfriDev 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 m2
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 m3/hour
1.1 m3/hour
0.9 m3/hour
0.7 m3/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., [Cited: 04 29, 2010.]
2. RWSN. AfriDev Pump. RWSN: Rural Water Supply Network. [Online] 4teamwork, 02 06, [Cited: 04 29, 2010.]
Please note: Some technical specifications may have been modified for this exercise