FSB Series F46 Fluorine Plastic Chemical Pump

The FSB series is a single-stage fluorine-plastic alloy centrifugal pump built for the long-term transfer of acidic, oxidising and corrosive media, including substances whose physical properties are similar to water. The published performance covers 3–100 m³/h of flow with heads from 15 to 55 m.

To handle a wide range of corrosive liquids, all wetted parts are made from F46 or fluoroplastic alloys, which combine the corrosion resistance of the fluoropolymers with enough mechanical strength to hold tolerances in service. Every model runs at 2900 r/min, and the published table sets out flow, head, port size, shaft power, motor power, NPSH required and efficiency for each design.

The range is published in two mounting builds: a long-leg (bearing pedestal) version and a short-leg version identified by the suffix D on the model code. Matching the drive build to the available floor space and to the suction arrangement lets the same hydraulic end serve chemical, pharmaceutical, dye, metallurgical and petroleum duties.

• Pharmaceutical manufacturing: Transfers corrosive process liquids and intermediates where metal contact must be avoided.
• Chemical plants: Long-term transfer of acidic and oxidising media in production and dosing lines.
• Dye and pigment production: Circulates strongly coloured and corrosive dye liquors.
• Metallurgy: Handles pickling acids and corrosive rinse solutions in metal finishing.
• Petroleum and petrochemical: Moves corrosive chemical streams with water-like physical properties.
• Electroplating: Transfers plating baths and treatment chemicals in plating lines.
• Water and waste treatment: Doses corrosive treatment chemicals into process and effluent streams.

1. Match the model to the duty point from the published table, since the same 80 mm casing covers 42–50 m³/h at heads from 20 m to 55 m as the impeller diameter grows.
2. Choose the long-leg build when the pump needs a bearing pedestal and greater support, and the short-leg (D) build when space between the motor and the pipework is limited.
3. Check the NPSHr column against the available suction head: the 80 mm and 100 mm models are published between 3.0 m and 4.0 m, and the 65FSB-32 at 2.0 m.
4. Confirm the liquid is within the temperature capability of F46 parts and that it is compatible with fluoroplastic sealing rather than requiring a metal seal face.
5. Use the published inlet and outlet sizes to check the existing pipework, because the series uses unequal port sizes such as 80 mm in and 50 mm out on the higher-head models.
6. State whether the medium contains abrasive particles, as that drives the choice between the standard and the alternative shaft-seal arrangement.