Chemical Pumps
Chemical pumps ware special devices artificial to move fluids, they displace a volume of the chemical by mechanical or bodily action. One thing ordinarily related with the pumps is that the furnish pressure to move the chemical, this is in fact incorrect, the pumps do not originate pressure alone, they plainly disperse the chemical causing a flow, the pressure is caused when resistance is added to the flow. There are two main categories that chemical pumps fall under; Rotodynamic Pumps and determined Displacement Pumps. The two categories retell different methods of curious the chemical straight through the pump:
Chemical Pumps
Positive Displacement
Swimming Pool Pump
This type of pump works by trapping part a fixed estimate 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 straight through the pump
Rotodynamic Pumps
This type of pump works differently and relies on Kinetic power to help disperse the chemical. The flow velocity is increased which in turn adds the Kinetic power to the pump, the power is then converted into possible pressure. The conversion of Kinetics to pressure is quite a involved process and can be explained by Bernoulli's Principle, the First Law if Thermodynamics.
There are a lot of suppliers out there gift Chemical Pumps, some are great than others and before choosing the type of pump you wish you should read in to the different types available and find out the one that will work best for what you need it for.