Step 9: Vendor Evaluation & Technical Clarification

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Evaluation Criteria

Compliance with datasheet
Deviation list
Past references
Lead time
Spare parts availability

Lowest price is not always the best choice.

Step 1: Define Process Requirements
(Define what the pump must do)Required DataFlow rate (m³/h or GPM)Total Dyn.....
Step 2: Suction Conditions & NPSH Evaluation
(Prevent cavitation)Required DataSuction source (tank, pit, pipeline)Liquid leve.....
Step 3: Select Pump Type (API 610 Classification)
Selection GuideOH Pump → General service, moderate pressureBB Pump → H.....
Step 4: Materials of Construction
(Compatibility with the fluid)Required DataCorrosivenessErosion riskOperating te.....
Step 5: Mechanical Seal & Sealing System
(Safety and reliability)Required DataFluid toxicity/ flammabilityTemperature and.....
Step 6: Driver Selection (Motor / Turbine)
Required DataRequired power (kW)Voltage / frequencyArea classification (ATEX / h.....
Step 7: Pump Curve & Operating Point Check
(Avoid hydraulic problems)Required DataPump performance curveBest Efficiency Poi.....
Step 8: Standards & Compliance
Required StandardsAPI 610API 682 (seals)ISO / ASME (if applicable)DocumentationD.....