Suction Hand Pumps

Hand pumps are manually operated pumps; they use human power and mechanical advantage to move fluids or air from one place to another. They are widely used in every country in the world for a variety of industrial, marine, irrigation and leisure activities. There are many different types of hand pump available, mainly operating on a piston, diaphragm or rotary vane principle with a check valve on the entry and exit ports to the chamber operating in opposing directions. Most hand pumps are either piston pumps or plunger pumps, and are positive displacement.

Hand pumps are commonly used in developing countries for both community supply and self-supply of water and can be installed on boreholes or hand-dug wells.

手動泵是手動操作的泵； 他們利用人力和機械優勢將流體或空氣從一個地方移動到另一個地方。 它們廣泛應用於世界各國的各種工業、海洋、灌溉和休閒活動。 有許多不同類型的手動泵可供選擇，主要根據活塞、隔膜或旋轉葉片原理進行操作，並在腔室的入口和出口上有一個止回閥，以相反的方向操作。 大多數手動泵是活塞泵或柱塞泵，並且是正排量。

手動泵在發展中國家通常用於社區供水和自供水，可以安裝在鑽孔或手挖井上。

Wikipedia : https://en.wikipedia.org/wiki/Hand_pump