SFBX Series Self-Priming Stainless Steel Chemical Pump

The SFBX series is a corrosion-resistant self-priming centrifugal pump that combines an advanced cantilever structure with mechanical shaft sealing. The published duty envelope is 0.8–23.8 m³/h of flow with heads from 3 to 28 m, driven by motors from 0.25 kW to 3 kW.

Parts in contact with the medium and the connecting frame are made from high-quality stainless steel, and the series is published for liquids that may contain fine, soft particles or fibres, whether the duty is corrosive or subject to hygiene requirements. Semi-open or closed impellers are used depending on the medium.

Because it primes itself, the pump can lift liquid into the casing without a foot valve on many duties, which simplifies tank emptying, sump transfer and batch dosing. The manufacturer publishes two temperature limits depending on how the pump is coupled: up to 90 °C for the direct-coupled type and up to 105 °C for the bearing-bracket type.

• Sewage and effluent treatment: Transfers corrosive liquids carrying fine soft particles in treatment works.
• Chemical plants: Doses and transfers corrosive liquids between tanks and process lines.
• Electroplating: Circulates plating baths and rinse water containing fine particles.
• Cosmetics production: Moves hygienic liquid products and emulsions that must stay free of contamination.
• Food and beverage: Handles liquid food products where stainless contact and self-priming are needed.
• Pharmaceutical: Transfers process liquids in duties that require stainless-steel contact and easy cleaning.
• Tank and sump emptying: Primes itself to draw liquid from below the pump without a foot valve on many duties.

1. Match the model to the duty point from the published curves, because the four hydraulic sizes step from 5.5 m³/h at 9 m on the 25SFBX-8 to 23.8 m³/h at 28 m on the 50SFBX-22.
2. Choose the connection type from the working temperature: the direct-coupled build is published up to 90 °C and the bearing-bracket build up to 105 °C.
3. Confirm that the solids in the liquid are fine and soft. The series is published for that condition and is not intended for hard or abrasive particles.
4. Select the impeller form from the medium: semi-open where some solids or fibres are present, closed where efficiency and head matter more than solids passage.
5. Check the suction lift and priming time against the installation, because the self-priming behaviour depends on the casing volume and the suction line volume.
6. State the supply and phase at order stage: three-phase 380 V / 50 Hz is the standard published motor, and the D versions are published for single-phase supply.