Do you know what a plastic pump is for and when it is advisable to have one in your process? Do plastic pumps also pump plastic or only other fluids? Read on and learn where non-metallic pumps are unbeatable and what their differences and limits are.
Plastic pumps with all their functions and possibilities
The selection of pumps made of plastics is confusingly large. Flows start from just a few liters up to several thousand cubes per hour and manufacturers are to be found around the globe. Both, specialized companies as well as serial producers are long established in their individual markets. While the larger segment of small pumps (less than one cube per hour) is mostly covered by standardized pumps we see an increasing amount of special requests for which specialized pump manufacturers provide individual pump solutions.
Other than sometimes anticipated the material plastic is not a synonym for “cheap material”. Pump manufacturers know that specifications and decisions are sometimes based on this misconception, where metal pumps are always considered to be from superior quality. In fact plastic pumps today offer a surprisingly reliable and economical pump solution not just equal but often superior to those of metal pumps.
For very small flows and dosing requirements, the use of displacement pumps (i.e. diaphragm pumps) is often recommended. Though, the largest range of flow is being covered by centrifugal pumps (also: ra-dial pumps). These pumps can differ in design and characteristics but in general all wetted parts are made of or covered with plastics.