Afridev with bottom support

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The Afridev pump with bottom support is a deeper pump than the Afridev pump. Photo: RWSN.
The Afridev pump with bottom support. Photo: RWSN.

The Afridev Pump with a Bottom Support System (BSS) is a technology that uses a reinforced version of the Afridev Pump together with a Support from the end of the borehole (BSS). The Afridev Pump with BSS is a conventional lever action handpump. The configuration of the down hole components includes threaded riser pipes, standard Afridev cylinder, Pedestal pipe (support from the borehole end), and FRP pumprods.

It is designed for water lifting in low water table areas and the maximal lift recommended is 80 m. The Afridev Pump with BSS is a public domain pump defined by RWSN specifications. The Afridev Pump with BSS is fully corrosion resistant, relatively easy to install by pump mechanics and can be maintained by the communities.

Suitable conditions

Depths for use: between 50 - 80 m
Cylinder diameter: 50.0 mm
Maximum Stroke: 225 mm
Approx. discharge (75 watt input): at 50 m head: 0.55 m³/hour

at 60 m head: 0.45 m³/hour
at 70 m head: 0.4 m³/hour
at 80 m head: 0.35 m³/hour

Population served: up to 150 people
Households: 10 – 15 households
Water consumption: 15 - 20 l/per capita
Type of well: borehole

Construction, operations and maintenance

Pump head, handle and pump stand are made of galvanised steel, pump rods of FRP rods (fibre glass reinforced plastic), rising main of PVC-U pipe (Ø 48 mm), cylinder of PVC-U pipe with brass liner (Ø 50 mm), plunger of brass and footvalve of plastic. This pump is fully corrosion resistant.

The reinforced “above ground components” have a potential for local manufacturing, but all other parts require a high degree of manufacturing quality that is presently not available in most of the African countries. Imported components however require a tight quality control in order to improve the lifetime of certain pump components considerably (wearing parts).

The installation of the Afridev Pump with BSS is relatively easy for trained installation crews and lifting equipment is not needed.

This pump has an excellent “Community Management Potential”, it is reliable, easy to repair by a village caretaker and popular with the communities.