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Handpumps

56 bytes added, 01:59, 2 November 2012

→‎Diaphragm pumps

====Diaphragm pumps====

[[Deep-well_diaphragm_pump|Diaphragm pumps ]] are pumps employing a flexible diaphragm that is expanded and contracted to displace water. The advantages of diaphragm pumps are that they are easy to install, because no heavy mechanical parts are used. They can also be made corrosion-resistant through the use of plastic

hoses instead of metallic rising mains.

The disadvantages are that diaphragm pumps need high-quality rubber diaphragms, which are costly to buy and replace, and they have a relatively low efficiency because of the energy needed to expand the diaphragm on every stroke. In addition, the working principle is relatively complex so mechanics and caretakers need to complete comprehensive training programmes.

 

 

====Piston / Suction handpump====

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