The basic function of a dosing pump is to transfer a liquid or gas of predetermined volume over a specific time interval. Today it is frequently used in both industrial and domestic settings. In industry it can be used for boiler feed water conditioning, in food production lines, and for transferring precipitation liquids in treatment plants, while in domestic settings, for example, dosing pumps that dispense chlorine can be used for cleaning purposes in a hotel swimming pool.
ProMinent Dosing Pumps
Dosing pumps can dose various chemical substances into systems to induce a chemical reaction, or dose water for the same purpose. To achieve the desired result, a very precise and specific volume of liquid must be transferred. Dosing pumps can transfer liquid volumes with very high precision, and thanks to this property they are frequently preferred for such applications.
Dosing pumps are positive displacement pumps that perform their dosing function with a piston or a diaphragm. As the piston retracts, the discharge line closes and the pump chamber draws in fluid. The piston is then pushed back into the chamber, the discharge line opens, and the liquid is dosed.
How the dosing rate is adjusted differs depending on the type of dosing pump. In solenoid- and diaphragm-type dosing pumps, the stroke — i.e. the number of diaphragm movements — is adjusted, while in peristaltic pumps the dosing rate is set by adjusting the motor speed. Dosing pumps can be manufactured in many different materials, from stainless steel to plastic. At this point, choosing the correct pump type and material according to the fluid and process to be dosed is important.
Source: ProMinent
