Suction Pressure Limit Tables

Product line suction pressure limits are populated in the suction pressure limit table. The SKB offers flexibility in choosing options (rules) that determine the limits. Limits can be driven basis material through the use of performance options and be defined by equations. See the examples below.

For vertical turbine pumps, this data applies to the bowl.

To enter suction pressure limits:

1. In the navigational tree, open the engineering data folder for the product line to edit.

2. In the engineering data folder, click on the Suction pressure limit

3. The data manager window will display the suction pressure limit table.

4. Enter a row rule.

5. Enter column rule or rules.

6. Insert the numbers of columns needed to populate your data. Click here to see an example.

    

   

   Suction Pressure Table with two columns inserted

   Suction Pressure Table with two columns inserted

7. Select or manually enter the rule criteria for the columns.

8. 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 - Suction pressure table with pump size and material as the rule criteria.

   

  

  (Pump size, material, cast iron, and ductile iron were selected from drop down selection boxes.)

• Example 2 - Suction pressure table with pump size and max temperature as the rule criteria.

   

  

  (Pump size and max temperature were selected from drop down selection boxes, max temperature criteria was manually entered.)

• Example 3 - Suction pressure table with pump size, liquid, and max temperature as the rule criteria.

   

  

  (Pump size, max temperature, liquid, water, and hydrocarbon were selected from drop down selection boxes, max temperature criteria was manually entered.)

• Example 4 - Suction pressure table with equations.

   

  

  This image shows the suction pressure being defined by equations.

  • =(MAWP – MaxDiffPressRatedDesity): This equation would generally be used for product lines where the suction pressure limits are the same as the working pressure limits and it is desirable to limit the suction pressure value based on the MAWP and the maximum differential pressure.

  • =WPL * 1.1: Suction pressure calculated  based on working pressure limit.

9. Click to save changes.