Why Use An External Tool
Final pump selection depends on manufacturer curves, product-specific performance data, fluid compatibility, materials, motors, controls, and available configurations. A site calculator can help check flow, head, and pressure-loss assumptions, but the product match belongs in current manufacturer tools.
Inputs To Gather First
- Design flow rate at the expected duty point.
- Total dynamic head or system head estimate.
- Fluid type, temperature, density or specific gravity, and viscosity.
- Suction conditions or NPSH available when known.
- Power supply, materials, connection, installation, and duty-cycle constraints.
Curated Official Tools
Grundfos
Last checked: 2026-05-25Grundfos SELECT
Official Grundfos selection environment for comparing pump options against a duty point and application context.
Use Cases
- Centrifugal pump selection when Grundfos products are acceptable candidates.
- Comparing duty-point options against manufacturer curve and configuration data.
- Preparing a short list for review with product-specific performance information.
Required Inputs
- Flow rate at the intended duty point.
- Total dynamic head or system head estimate.
- Fluid type, temperature, and density or specific gravity.
- Viscosity or solids information when the fluid is not clean water.
- Power supply, materials, connection, and installation constraints.
Cautions
- Confirm NPSH margin, operating region, and motor limits before treating a selection as final.
- Use current manufacturer data for curves, materials, and configuration limits.
- Review fluid-property corrections for viscous, hot, corrosive, or solids-bearing service.
KSB
Last checked: 2026-05-25KSB EasySelect
Official KSB configuration and selection tool for matching KSB pump products to a specified application.
Use Cases
- Pump selection where KSB products are possible candidates.
- Checking manufacturer curve and configuration data after estimating head and flow.
- Comparing options across a product family before detailed application review.
Required Inputs
- Design flow rate.
- Total dynamic head or required differential head.
- Fluid, temperature, density, and viscosity.
- Operating schedule and duty point expectations.
- Material, seal, motor, and installation constraints.
Cautions
- Check the selected operating point against the manufacturer's preferred operating region.
- Confirm NPSH available exceeds the tool's NPSH requirement with suitable margin.
- Do not use a catalog match without checking fluid compatibility and site constraints.
Xylem / Goulds Water Technology
Last checked: 2026-05-25Xylem Goulds Water Technology Selection Tools
Official Xylem Goulds Water Technology landing page for pump selection and sizing tools.
Use Cases
- Water-system pump selection where Goulds Water Technology products are possible candidates.
- Reviewing a duty point against manufacturer-supported product data.
- Preparing product-specific options after system head and flow checks.
Required Inputs
- Required flow rate.
- Total dynamic head or system curve information.
- Water or process-fluid properties, including temperature and specific gravity.
- Power supply and installation constraints.
- Material, control, and duty-cycle requirements.
Cautions
- Confirm the tool scope matches the application and fluid being considered.
- Review NPSH, minimum flow, motor loading, and operating region before final selection.
- Use manufacturer support for unusual fluids, solids, high temperature, or corrosive service.
Sulzer
Last checked: 2026-05-25Sulzer Selection Tools
Official Sulzer selection-tools page for pump and equipment selection workflows supported by Sulzer data.
Use Cases
- Pump selection where Sulzer products or services are relevant.
- Checking manufacturer data for a duty point after estimating flow and head.
- Reviewing application-specific options that depend on current product information.
Required Inputs
- Flow rate and required head.
- Fluid, temperature, viscosity, and specific gravity.
- Application and operating conditions.
- Material, drive, installation, and service constraints.
- NPSH available or suction-side conditions when applicable.
Cautions
- Confirm current product data and application limits before specifying equipment.
- Review NPSH margin, operating range, and fluid-property corrections.
- Escalate unusual service conditions to manufacturer or application support.