Metering pumps are frequently used to enhance water quality by feeding chemical additives into the supply. Metering pumps include diaphragm pumps, gear pumps, peristaltic pumps, and piston pumps. Additives applied can range from scale inhibitors to redox agents to non-oxidising biocides.
- Scale inhibitors, such as zinc chloride, prevent buildup inside pipe walls, which constricts water flow and reduces system efficiency.
- Acid/base agents such as HCl, H2SO4, NaOH and KOH control the pH of water. pH greatly affects the “kill power” of redox agents against biological contaminants.
- Redox agents such as NaOCl are used for biological control. They act by attacking an organism’s cell.
- Non-oxidising biocides help control biological contaminates such as zebra mussels. Generally, they rely on toxicity rather than the ability to strip electrons.
Scale inhibition, acid/base agents, oxidant/redundant, and biocide treatments can work with the whole range of metering pump technologies. Your selection will depend on your choice of cost, material, flow, and pressure requirements.
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