Pedrollo F-INOX Stainless Steel EN 733 Pump

Pedrollo F-INOX pump explained

The Pedrollo F-INOX is an EN 733 close-coupled centrifugal pump built entirely in stainless steel AISI 316, rated up to 2200 l/min (132 m³/h), up to 37 m of head, 10 bar (PN10) and IP 55. Seven Star LLC supplies the F-INOX in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

A model name such as F 50/160B-I is built from the nominal port size (50 mm), the nominal impeller size (160 mm), a letter for the impeller trim (A, B or C) and I for Inox. The datasheet gives F 50/160C-I at 4 kW with 27 m at 300 l/min, F 50/160A-I at 7.5 kW with 37 m, F 65/125C-I at 4 kW with 16 m at 600 l/min and F 65/125A-I at 7.5 kW with 23 m.

F-INOX technical specifications

The values above come from the manufacturer technical data for the series. Individual models inside the F-INOX range differ in power, head and current, so always confirm the exact model code before ordering.

How the F-INOX works and what limits it

Pump body, cover and impeller are AISI 316 stainless steel, the motor shaft is AISI 316L, and the mechanical seal is silicon carbide against silicon carbide with Viton (FN-24SV) on a 24 mm shaft. Limits are suction up to 7 m, liquid -10 to +90 °C, ambient -10 to +40 °C. Three-phase IE3 motors are used.

EN 733 defines the dimensions and rated duty points of end-suction centrifugal pumps on a bearing frame or close-coupled to a standard motor, with PN10 flanged ports. Because the port sizes, the shaft ends and the performance points are standardised, a pump of this kind can be matched to the dimensions of an existing installation and pumps from different makers share the same footprint logic. Liquid enters axially through the suction port, the impeller adds velocity, and the volute converts that velocity into pressure at the delivery flange. Efficiency is highest near the design point of the chosen impeller diameter.

F-INOX models and performance data

The heads in this table are read from the first point of the manufacturer 50 Hz performance table and fall as flow increases, so use the full curve for the real duty point. Where a 60 Hz version is needed, ask us: the manufacturer states that 60 Hz motors are available on request for many models.

Where the F-INOX fits: related Pedrollo pumps

For the cast iron EN 733 versions see the F, FG and F4 ranges. The CP range covers smaller duty and the HF Medium Flow covers lower heads at high flow.

Selecting a F-INOX pump: checklist

• Choose 50/160 for higher head or 65/125 for higher flow
• Choose the impeller letter A, B or C and the matching motor
• Confirm liquid compatibility with AISI 316 and the Viton seal
• Check pressure within PN10
• Three-phase IE3, 50 Hz

Installing and maintaining the F-INOX

Install the pump on a rigid baseplate or concrete plinth with the motor and pump shafts aligned within the limits given in the manual, and use flexible joints or expansion pieces if pipe forces could load the flanges. Keep the suction line straight for several pipe diameters before the pump, with a reducer that does not trap air, and avoid a suction pipe smaller than the port. Fill and vent the casing before starting, check the rotation, and never run the pump against a closed valve for long. Inspect the mechanical seal after the first weeks of service and at regular intervals. Keep a record of the nameplate data, since impeller trim and motor size change with the letter at the end of the model name.

F-INOX applications in Oman and the GCC

The stainless steel construction suits coastal sites, food-grade and washdown areas, water treatment, cooling circuits and irrigation with treated water. In the GCC, humidity and salt air make stainless an economical choice over the life of the pump. Verify chloride level of the pumped liquid.

On industrial and municipal sites in Oman, standardised pumps are chosen because they can replace or match existing units on the same baseplate and flange pattern. Dust, high ambient temperature and coastal humidity are the usual design conditions, so verify motor protection class and specify a seal suitable for the liquid. State if the liquid is treated water, brackish water or cooling-tower make-up.

Information to send with your F-INOX RFQ

• Duty point: flow rate and total head, plus the margin you want above it
• Liquid, temperature and any chlorides or other chemicals
• Suction conditions and NPSH available, pipe sizes and flange standard
• Motor requirement: voltage, frequency, IE class, and any bare-shaft or coupled arrangement
• Quantity, spares (mechanical seal, impeller) and delivery location

Documents and quotation

The manufacturer datasheet for the F-INOX is attached on this page, and the performance tables in it should be checked against your duty point. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.

Send the model code, quantity, voltage and frequency and the duty point, and we will confirm availability and prepare a quotation for Oman and the GCC.