Selecting the right pump meant for sanitary process is function of number of factors. Among them, the material that is pumped is the most important one.
You have to consider its density, viscosity, temperature and also flow rate to decide the size and kind of sanitary pumps which can be right for you.
Next you have to consider the function of the pump. Whether the pump is meant for evacuating the containers or to be used for filling?
All your workflow as well as plant configuration will also bear on the pump selection. All these variables are the processing environment.
Liquids contain abrasive particulates, their size, length and suction type and discharge piping, pumping angles elevations etc. all these need to be taken into consideration.
Following are few different kinds of pumps which will be briefly discussed in this post.
- Air diaphragm pumps
Basically, meant for handling viscous products, and these air-operated pumps are good choice for unloading and moving products that contains abrasive particles.
They are for food industries applications where maximum portability and high flow rates needed.
- Air piston pumps
With reciprocating action positive displacement is created for moving low or medium-viscosity materials, and commonly used in cosmetic, food-processing and personal-care industries.
Their pumping action can move ingredients of different thicknesses like cheese sauce or cake batter.
- Centrifugal pumps
Centrifugal pumps are best for any low-viscosity fluids which are not partially vaporized or aerated or. These pumps are particularly very effective in the beverage processing industry due to the gentle handling of delicate liquids.
- Self-priming pumps
These pumps create vacuum and maintain prime even while pumping material which is laden with gasses and air. These features will make them suitable for difficult type of clean-in-place applications.
- Peristaltic pumps
Peristaltic pumps can move liquid through any sanitary tubes. As there are no seals leaking or valves clogging, hence they are most hygienic options.
Rollers will compress the tubes, and force material into process piping. As rollers will release, tubes will decompress to create suction which will draw in more material.
- Positive displacement pumps
If the processing materials are too viscous for any centrifugal pumps then, positive displacement pumps are generally used, especially if low flow rates can be acceptable.
- Progressive cavity pumps
This is another option for positive displacement, progressive cavity pumps which use single helical rotor which creates cavities where the material flows. Cavities will then advance from suction end of pump to discharge end, where all the contents will be pushed out.
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