What are the two types of chemical feed pumps used in water treatment?

The two types of chemical feed pumps commonly used in water treatment processes are peristaltic and diaphragm pumps.

Peristaltic pumps operate by compressing and relaxing flexible tubing to create a vacuum that draws in the chemical and then pushes it out in a controlled manner. This design allows for precise dosing and is particularly suited for handling viscous fluids or those containing particulates without contaminating the system, as the fluid only contacts the tubing.

Diaphragm pumps, on the other hand, utilize a diaphragm that moves up and down to create pressure differentials that draw fluid in and push it out. They provide reliable and consistent flow rates and are effective for metering low to medium viscosity fluids. These pumps are also suitable for applications that require precise control over chemical dosage and can handle a wide range of chemicals safely.

Together, these two types of pumps are critical in ensuring accurate and safe dosing of chemicals in water treatment, which is essential for maintaining water quality and meeting regulatory standards.