What type of equipment is used to feed liquid fluoride or liquid chlorine?

The use of positive displacement diaphragm metering pumps for feeding liquid fluoride or liquid chlorine is appropriate because these pumps are designed specifically for precise and accurate dosing of chemicals. They achieve this by using a diaphragm that moves back and forth, allowing for the controlled displacement of liquid. This mechanism enables them to handle viscous fluids and provide a constant flow rate, regardless of changes in pressure, which is crucial when dealing with hazardous chemicals like fluoride and chlorine.

These pumps are also safe for such applications because they can be sealed, minimizing the risk of leaks that could be dangerous when handling these corrosive substances. Their ability to deliver consistent, measured amounts of chemicals ensures the effectiveness of water treatment processes, maintaining proper chemical concentrations critical for disinfection and compliance with health standards.

In contrast, other types of equipment mentioned, such as gravity-fed tanks and centrifugal pumps, may not provide the same level of precision or safety when handling liquid chemicals under varying conditions. Peristaltic pumps, while also capable of precise dosing, may not offer the same level of control as positive displacement diaphragm metering pumps when it comes to maintaining a steady flow against fluctuating pressures. Thus, positive displacement diaphragm metering pumps are the preferred choice for this type of chemical delivery in water treatment applications