Pump — Complete Guide Normalized Centrifugal

A standardized centrifugal pump follows specified dimensions and parameters that ensure interchangeability between manufacturers — same baseplate, same connections, same dimensions. This reduces replacement costs, simplifies spare parts inventory, and eliminates dependence on a single supplier.

Yes. The specification for horizontal end-suction centrifugal pumps for chemical process was born as ANSI B73.1 and is maintained today by ASME — which is why catalogs list it as "ANSI B73.1", "ASME B73.1" or "ANSI/ASME B73.1". The technical reference is the same: standardized dimensions (baseplate, flanges, shaft) interchangeable across manufacturers. In practice, an existing "ANSI-standard" pump can be replaced by an FBCN of the same dimensional designation without redoing base or piping.

Back pull-out is a design feature that allows removing the rotating assembly (impeller, shaft, mechanical seal, bearing housing) from the rear of the pump without disconnecting the volute from the piping. This drastically reduces maintenance time and downtime costs — essential in industrial plants with continuous operation. This is what the FBCN technical manual (MTEC-03/00) specifies: "back-pull-out construction, which allows the bearing assembly to be removed from the volute without disconnecting and misaligning the pumping piping" (translated from the Portuguese original).

The FBCN is a bearing-frame (long-coupled) centrifugal pump: the rotating assembly runs on its own bearing frame, coupled to the motor through a flexible coupling — the construction the FBCN manual describes as back pull-out, allowing removal of the bearing assembly without disconnecting the volute from the piping. It is the opposite of a close-coupled (monobloc) pump, where the impeller mounts directly on the motor shaft end. Bearing-frame construction eases maintenance, alignment and seal replacement in continuous industrial operation.

FB Bombas is registered with CRCC Petrobras and meets API 610 (special solutions) and API 676 (gear) requirements. The FBCN series is a horizontal pump standardized per ASME B73.1 with back pull-out design. Available in cast iron, stainless steel, and special alloys.

Industrial water, chemical processes, cooling systems, HVAC, sugar-ethanol plants, mining, pulp and paper, fire-fighting, and any application requiring low-viscosity fluids at high flow rates with simplified maintenance and parts interchangeability.

A standardized pump follows specified dimensions (baseplate, flanges, shaft) allowing interchange between manufacturers. A non-standardized pump has proprietary dimensions, making replacement difficult. In industrial plants, standardized pumps are preferred because they reduce maintenance time and eliminate dependence on a single manufacturer.

Flow rate up to 2,200 m³/h, head up to 135 m, temperature up to 260°C. 53 models: 43 standard (DN25 to DN150) + 10 large capacity (DN200 to DN300) in various impeller configurations and construction materials.

In many cases, yes. The FBCN is a candidate for dimensional replacement of standardized pumps from KSB, Schneider, Dancor, Ebara, Sulzer, OMEL, Thebe, Wilo, Famac and Imbil. Equivalence is confirmed model by model: dimensional drawing, shaft centre, flanges, baseplate, coupling, Q×H duty point, NPSHr and power. Back pull-out for fast maintenance. Brazilian manufacturer since 1944, CRCC Petrobras registered, ASME B73.1 compliant.

The FBCN is available in cast iron GG20 (industrial water, sanitation, low corrosion), A216 WCB carbon steel (chemical and petrochemical, up to 25 bar depending on flange), nodular iron (reinforced mechanical strength), and A743 CF8M (316) stainless steel for acidic, food-grade or corrosive fluids. FB Bombas engineering validates the specification against the chemical compatibility table for the supplied fluid.

The 0/100/150 % envelope is the NFPA 20 requirement (also adopted by NBR 16704) defining Q×H curve points at zero flow (shutoff), nominal, and 150 % of nominal. The pump must deliver at least 65 % of head at 150 % flow and no more than 140 % of nominal head at shutoff. The FBCN specified for fire protection ships with a factory-certified curve at these three points for Fire Department approval.

Yes. Beyond the 43 ASME B73.1 standardized models (DN25 to DN150, flow up to 1,000 m³/h), the FBCN has 10 large-bore models (DN200 to DN300) for flows up to 2,200 m³/h and head up to 135 m, retaining back pull-out construction and the same material options. The 53 models cover the full industrial application range without resorting to a split-case pump.

Yes. FB Bombas' FBCN Series covers the same technical segment served by KSB, Imbil, Sulzer and other brands in the Brazilian market: ASME B73.1 normalized centrifugal pumps, back pull-out construction, 53 models up to 2,200 m³/h and 135 m. Objective differentiators: continuous operation since 1944 under the same corporate registry (predating Petrobras itself), engineering and factory in Cabreúva-SP, spare parts without currency exposure and CRCC Petrobras qualification.