There are two main categories that Chemical pumps fall under; Rotodynamic Pumps and Positive Displacement Pumps. The two categories describe different methods of moving the chemical through the pump:

Positive Displacement

This type of pump works by trapping part a fixed amount of the chemical and then displacing (forcing) into in to the pipe to be discharged, that whole process is what causes the chemical to flow through the pump

Rotodynamic Pumps

This type of pump works differently and relies on Kinetic Energy to help disperse the chemical. The flow velocity is increased which in turn adds the Kinetic Energy to the pump, the energy is then converted into potential pressure. The conversion of Kinetics to pressure is quite a complicated process and can be explained by Bernoulli's Principle, the First Law if Thermodynamics.

There are a lot of suppliers out there offering Chemical Pumps, some are better than others and before choosing the type of pump you require you should read in to the different types available and find out the one that will work best for what you need it for.

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2012-08-30

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