The Metering pumps are positive displacement chemical dosing devices that may be adjusted manually or automatically depending on the process conditions. It is capable of pumping a wide range of chemicals, including acids, bases, corrosives, viscous liquids, and slurries, with a high level of repeated precision. A metering pump delivers a precise volumetric flow rate by transporting a certain amount of liquid over a given period of time. The supply of fluids at precise, predictable flow rates is referred to as metering. Despite the fact that a few types of pumps are far more suited than most others, the term “Metering pump” relates to the application or purpose rather than the specific type of pump used.