Kierrepumput

Kierrepumput, also known as screw pumps or Archimedes' screws, are a type of positive displacement pump that utilizes a helical rotor to move fluids. Invented by Archimedes around 250 BC, this ancient technology has found numerous modern applications.

The basic design consists of a screw-shaped rotor that rotates within a stationary casing or a similarly shaped groove. As the screw turns, it traps discrete volumes of fluid at one end and, through the rotation, pushes them along the screw's axis towards the discharge end. The sealing between the rotor and the casing is crucial for efficient operation, and various designs exist to minimize leakage.

Kierrepumput are particularly well-suited for handling viscous fluids, slurries, and solids due to their gentle pumping action, which avoids excessive shear or damage to the transported material. They are often used in applications such as sewage treatment, sludge handling, agricultural irrigation, and food processing. Their simple construction, reliability, and ability to operate at low speeds with high efficiency contribute to their continued popularity. Maintenance is typically straightforward, and they can be made from a variety of materials to suit different operating environments.