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Nira AF-85 pump

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The Nira AF-85 Direct Action Handpump is based on a buoyant pump rod that is directly articulated by the user, discharging water at the up- & down stroke. The Nira AF-85 Pump is completely corrosion resistant.

====The mode of operation of a Direct Action Pump====

In most direct action handpump designs, the up and down movement of the piston is made by the pump rod with a T-handle directly connected at the upper end. The “pump rod” is made of plastic pipes, which are connected by threads and each pipe length is sealed air-tight. With this system, the pump rod pipes are floating in the water of the rising main and therefore reducing the force needed on the up-stroke.

Because of the narrow clearance in diameter between pump rod and rising main (approx. 6 to 10 mm), the pump rod is displacing water during the down-stroke. This gives the advantage of a water delivery during up and down stroke. Direct action pumps are very simple to handle by the community. Once the riser pipes and pump rod pipes are connected, disconnection for maintenance is not required because these pipes are flexible enough to be pulled from the well or borehole in a big bow.

All “down-hole components” are made of plastic with few rubber parts, which makes the installation easy (light-weight) and also the pump is completely corrosion resistant to aggressive waters.

==Suitable conditions==

Winona

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