Positive displacement pumps are primarily used for what purpose?

Positive displacement pumps are specifically designed to move fluids by trapping a fixed amount of liquid and forcing it into the discharge pipe. This unique mechanism allows them to deliver a constant flow regardless of the pressure at the discharge outlet, making them particularly well-suited for applications requiring precise control of fluid volumes.

In the context of chemical dosing, this characteristic is highly advantageous. Positive displacement pumps can accurately dose chemicals into a water system, ensuring that the correct quantity is delivered consistently. This precision is essential in processes such as water treatment, where the appropriate amount of chemicals is vital for effective treatment and maintaining water quality.

While these pumps can also be used for other purposes, such as filling tanks or water circulation, their primary strength lies in their ability to handle small but precise volumes, which is crucial in chemical dosing applications. This is why they are predominantly utilized in scenarios that demand accuracy and reliability in fluid delivery, such as adding chemicals to maintain water quality in treatment plants or other industrial applications.