Deep well progressive cavity pump.
https://www.emergency-wash.org/water/en/technologies/technology/deep-well-progressive-cavity-pump
👉🏼 PDF: https://app.box.com/s/iwktzzb40mv9tiubdag43bbxnme4fauw __ A Deep Well Progressive Cavity Pump is a positive displacement pump that displaces a fixed amount of water per cycle. Water is lifted from depths of up to 300 metres using a helical rotor rather than a reciprocating piston. These pumps are useful for all phases of an emergency.