The NPSH (net positive suction head) adjustment tables contain corrections to the calculated NPSH which are dependent on rules defined in the table. The table offers flexibility in defining rule options which the NPSH corrections are based and provides selection options in defining the appropriate adjustment type and how their applied.
In the navigational tree, open the engineering data folder for the product line to edit.
Right click on the NPSH adjustment folder
Select the new button to create a table.
Note: A new table will be placed in the NPSH adjustment folder. Repeat steps 2 and 3 to create as many tables necessary.
Open the NPSH adjustment folder from the navigation tree.
Select (left click) a NPSH adjustment table to edit.
The data manager window will display the NPSH adjustment table.
Defined the adjustment type and how to apply.
Enter a row rule.
Enter a column rule or rules.
Insert the numbers of columns needed to populate your data.
Select or manually enter rule criteria for the columns.
Enter data in the appropriate column-row cell relationship. See the below examples.
Important
:
Remember to assign the correct units of measure before entering data.
Example 1 - NPSH adjustment table - factor (pump size & speed rated as the rule criteria).
This image shows a populated NPSH adjustment table where the pump size and speed rated determine the adjustment factor. The NPSH adjustments will be applied direct to "all flows".
Example 2 - NPSH adjustment table - value (pump size & temperature as the rule criteria).
This image shows a populated NPSH adjustment table where the pump size and max temperature determine the adjustment value. The NPSH adjustments will be applied direct to "all flows".