Suction Specific Speed

Pump specific speed when running, calculates increases in unit of volume in a unit of time through a unit of head pressure. The characteristics of the suction side of the impeller determine the efficiency.

where

𝑆 − Suction Specific Speed

𝑁𝑃𝑆𝐻_𝑟𝑒𝑞 − Net Positive Suction Head Required [ft]

𝑄_𝑏𝑒𝑝 − Capacity at Best Efficiency Point [gpm]

𝑁 − Pump Rotational Speed [rpm]

Input Parameters

1. To create a new case, click the “Add Case” button
2. Select the Pump Specific Speed application from the Pipeline Pumps module.
3. Enter Case Name, Location, Date and any necessary notes.
4. Fill out all required fields.
5. Make sure the values you are inputting are in the correct units.
6. Click the CALCULATE button

• Pump Speed [rpm]
• Capacity at the Best Efficiency Point [gpm]
• Net Positive Suction Head Required[ft]

Outputs/Reports

1. View the results.
2. If an input parameter needs to be edited be sure to hit the CALCULATE button after the change.
3. To SAVE, fill out all required case details then click the SAVE button.
4. To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
5. To generate a REPORT, click the REPORT button.
6. The user may export the Case/Report by clicking the Export to Excel/PowerPoint icon.
7. To delete a case, click the DELETE icon near the top of the widget.

• Suction Specific Speed

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