håndpumpe

A håndpumpe, or hand pump, is a simple mechanical device used to move fluids, typically water, by manual labor. It operates by creating a pressure difference that forces the fluid from one location to another. The most common design involves a piston moving within a cylinder. As the piston is pulled upwards, it creates a vacuum, drawing fluid into the cylinder through a one-way valve. When the piston is pushed downwards, it forces the fluid through another valve and out of the pump's outlet.

Hand pumps are found in various applications, from agricultural irrigation and domestic water supply in rural areas to emergency situations and recreational activities like inflating air mattresses or bicycle tires. Their simplicity, durability, and lack of reliance on external power sources make them highly practical and widely used across the globe. Different types of hand pumps exist, including suction pumps, force pumps, and lift pumps, each suited for specific tasks and depths. The efficiency of a hand pump depends on factors such as the diameter and stroke length of the cylinder, the design of the valves, and the physical effort applied by the user.