What Are Hand Pumps?
Hand pumps are pumps which are operated manually by hand as opposed via electricity or air.
Hand pumps can be of centrifugal or positive displacement technology where they can be piston or double diaphragm.
Centrifugal hand pumps require a foot valve in order to be self-priming. Their operation can be semi-rotary where the handle is limited in motion to a 180° radius, or rotary where their motion is in a 360° radius.
Positive displacement hand pumps can be single or double-acting. Single-acting pumps operate in one direction only, meaning when the lever is pulled forward or pulled up the pump draws in fluid and then when pushed or lowered the pump discharges the fluid.
A double-acting hand pump operates in both directions meaning when the pump is pulled forward or pulled up the pump draws in fluid as well as discharges at the same time. Our handy guide explains how each pump type works.
Maximum flow in a hand pump is around 8.1M³H, with heads up to 40M
