Chemical dosing pumps are intended to transfer a precisely measured amount of liquid or chemical solution within a fixed amount of time. Dosing pumps are commonly found in the agricultural industry as well as within chemical processing plants and even breweries. If you need to choose chemical dosing pumps for your application, it isn't always as easy as you might wish. You must be careful to select a pump which has been designed so that it is suitable for the pressure and the fluid you will be pumping and the temperature at which the pump will be required to work. Due to the varying nature of the chemicals used and the industries where pumps can be employed, these pumps can be constructed from a range of materials to accommodate the differing levels of corrosiveness or viscosity of the relevant liquid.
To choose a chemical dosing pump, you will need to know at least five things:
The desired flow rate:
A flow rate is typically measured in gallons per minute (GPM) although when considering a pump, the flow rate normally relates to the diameter of your chosen pump. The higher your desired flow rate will be the bigger the pump you will have to buy.
What fluid will you pump?
The thicker the liquid that you want to pump, the more attention you will need to give to the choice of pump diaphragm and fluid ends.
How much do you want to pump?
The chemical dosing pumps you choose must be able to supply your required flow rate and discharge pressure at about 85% of their capacity. You must allow some reserve capacity in case you ever need to increase your requirements, but you don't want to use a pump that is too big for your needs.
At what pressure and temperature will you be working?
To select the right dosing pump equipment, you must know the pressure at which you will be working. You must determine the pressure both on the inlet and the outlet of your pump and ensure that your pump is constructed out of materials that can withstand that pressure and which can cope with the required temperatures.
How is the pump powered?
Some chemical dosing pumps can be powered by electricity, and others can be run on gas. The most suitable driver for your pumps is going to depend on the nature of your operating site.