Pump selection criteria

In order to make a selection of the pump required for a specific installation it is necessary to first determine the desired flow rate or head. The NPSH available should be determine and if a centrifugal selection is possible, a system head-flow-rate curve should be developed. No matter the application, you can feel confident with your next pump selection ! Contact us today for assistance with pump selection , or general questions concerning pumps and other fluid handling equipment.

The installer has informed us that the house has KITCHEN and BATHROOMS.

The water level in the well with respect to the pump suction port is located at hs = m. In other words, it requires a combination of being articulate, highly involved and knowledgeable. Limiting your pump selection criteria to a single operating condition means taking a huge risk. It’s important to take a “system approach” to pump selection. What this means is that when making a pump selection realize that every pump operates within a system that is constantly changing. The following is a pump sizing problem to illustrate the calculations in this article.

Pump Sizing and Selection.

You are told to purchase a pump for your manufacturing facility that will carry water to the top of a tower at your facility. Selection of the pumping equipment is a crucial point that determines both process parameters and in-use performance of the unit under development. During selection of the type of pump three groups of criteria can be distinguished: 1) Process and design requirements. Nature of pumped medium.

For an existing pump , the diameter of the impeller is known. This enables the pump to start dry and re-prime itself without manually adding water. In addition, these pumps can be used when lots of air has to be moved such as with well point dewatering systems.

Here’s a smart way to find a pump that fits an application based on your own pump selection criteria Rely on your own pump selection criteria At Grundfos Product Center, you can use your own pump selection criteria , such as duty points and energy costs, when sizing your pump. Extrapolations beyond the published curve will not be accepted. Selecting the correct pump is paramount to ensure ideal energy efficiency. Irrigation pumps , in general, are driven either by engines or electric motors.

Over calculatepump headrequirement 1) Higher driver H. Positive displacement pumps These types of pumps are built as reciprocating, or as rotary machines. Insure the system is hydronically balanced. SELECTION OF PUMP TYPE AND PUMP 4.

Trim the impeller based on measured values. Capital cost, operation and maintenance (OM) costs, and other relevant criteria are evaluated. Selecting a pump for chemically aggressive liquids requires careful review of several fundamentally important data values to offer a product which can meet the needs of the handling system A reasonable safety margin and possible friction head losses should be considere though without proposing unnecessary oversizing: only in this way can unsatisfactory performance, unexpected failures or unjustified increases in purchasing and operating costs be avoided. Horizontal elbows or tees upstream of a fire pump must be pipe diameters from the suction flange on a split-case fire pump.

It is best to run a trial to test the ability of the pump to overcome the leakage. For existing systems, consult Vaccon for the equivalent pump size. Customized pump selection and analysis. Choose from over 0sizes in Goulds extensive offering. Always contains the latest available data.

Complete pump performance data and product information.