A self-priming pump is a specific type of fluid pump that needs to be filled with a liquid within the pump cavity or pump body to start the pumping process. This design feature provides an opportunity to increase operating efficiency in process plants where pumps are used for a series of repeated but intermittent operations.
The constant presence of fluid in the pump body enables the pump to better handle so-called “air pockets,” or accumulations of air bubbles in the pump’s operating mechanism that can impair its proper operation. In practice, self-priming pumps are previously filled with the relevant fluid through a small port located on the pump body (the chamber where the impeller is located). After this operation, the pump can be operated, triggering turbulence that allows the fluid to rise and “clear” the piping of air.
One of the most common design methods to induce the priming process involves the following steps:
The “self-priming” capability of this type of centrifugal pump comes from the ability of the tank to hold the liquid after its initial priming. In describing the concept of self-priming, reference has always been made to the centrifugal pump type. However, there are several types of pumps that can be associated with this term, specifically positive displacement diaphragm pumps, peristaltic pumps, and lobe pumps.
Debem offers a range of fully air operated double-diaphragm positive displacement pumps capable of complete self-priming features. In the specific case, the operation of the Cubic and Boxer lines of pumps makes the parallel tank inside the pump body unnecessary. This can be considered a tremendous advantage in applications where limited space conditions require the use of a pump with a smaller size than the standard size that characterizes reservoir models.
Self-priming pumps are used in many application areas. Specifically, within the food and pharmaceutical industry, pumps are placed within process lines to perform various operations such as:
Self-priming pumps also find easy use within the construction, agricultural, and water treatment sectors when it is necessary to be able to properly extract and pump water while at the same time maintaining high plant efficiency conditions.
The main advantages of a DEBEM self-priming pump are many and can be summarized in the following points:
With this article, we have defined and illustrated the advantages of self-priming pumps. If you are interested in purchasing a DEBEM self-priming pump get in touch with our sales department now. A knowledgeable team will guide you in choosing the technology best suited to your application needs.
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