An Air Operated Pump uses compressed air to create a suction force that moves liquids or slurries. It’s efficient, easy to maintain, and widely used....
https://www.nirmalapumps.com/air-operated-pump/

A diaphragm pump uses a flexible diaphragm to move fluids and slurries. It operates by alternately expanding and contracting the diaphragm, creating a vacuum that....
https://www.nirmalapumps.com/diaphragm-pump/