Centrifugal comparison
FBCN handles process liquids; FBOT was developed for organic thermal oil circulation. Fluid, sealing and duty point guide selection alongside temperature.
FBCN is a centrifugal pump for clean or cloudy liquids; FBOT is dedicated to organic thermal oils without abrasives and compatible with its materials. The documents publish series limits of 260 °C for FBCN and 350 °C for FBOT. Selection still requires checking the model curve, materials, sealing and suction conditions.
Compare the characteristics and bring your actual process conditions to the technical discussion.
Standardized centrifugal · process liquids
selection from the model curve
Organic thermal oil circulation
graphite packing and mechanical seal
Assess the characteristics below against the configuration and documentation of each pump.
| Criterion | FBCN | FBOT |
|---|---|---|
| Primary application | Clean or cloudy process liquids, subject to compatibility | Organic thermal oil circulation without abrasives |
| Published series temperature | Up to 260 °C; check material, pressure and sealing | Up to 350 °C; check oil and assembly conditions |
| Published sizes | DN 25 to 300; check the model drawing | DN 25 to 300; check the model drawing |
| Published series flow | Up to 2,200 m³/h; select from the model curve | Up to 2,200 m³/h; select from the model curve |
| Published series head | Up to 135 m; not simultaneous with maximum flow | Up to 135 m; not simultaneous with maximum flow |
| Published series speed | Up to 3,500 rpm; limits depend on model and material | Up to 3,500 rpm; check curve and configuration |
| Technical reference | Manual: mechanically compliant construction with ASME B73.1 | MTEC-16/00 manual and FBOT catalogue; check quoted flanges |
| Sealing | Packing or mechanical seal, configured for the service | Graphite packing and an oil-immersed mechanical seal |
| Construction | Back-pull-out; volute casing supported on feet | Back-pull-out; construction dedicated to thermal oil service |
| Testing and documents | Confirm test scope and acceptance criteria in the proposal | Manual specifies hydrostatic testing at 1.5 times operating pressure; confirm the quoted scope |
Select the model for the actual process conditions: the range maxima are not simultaneous. Catalogues and manuals have different scopes. Where their information differs, confirm the execution in the proposal. FB Bombas documents are in Portuguese.
Identify the fluid and service. For organic thermal oil circulation, assess FBOT, whose intended application is documented in its catalogue and manual. Provide the oil product, start-up and operating temperatures, flow and required head. Operation below 260 °C does not automatically make the two series equivalent.
For other process liquids, compare FBCN with the application requirements. Its manual links operating limits to pressure, temperature, material and sealing; suspended solids require consultation with FB. The mechanical reference to ASME B73.1 does not establish dimensional interchangeability with another pump.
Check the complete assembly before procurement: curve, suction conditions, driver, seals, connections and installation drawing. The general maximum flow, head, temperature and speed do not describe a single duty point. Request the proposed configuration for your process in writing.
FBOT is dedicated to this service and should be assessed even below 260 °C. Confirm the oil type, flow, head, suction conditions and start-up and operating temperatures. A temperature of 240 °C alone neither selects the model nor establishes the suitability of an FBCN.
The manual presents FBCN for clean or cloudy liquids and requires consultation with FB for suspended solids. Provide particle concentration, size and abrasiveness; a cloudy appearance alone is insufficient to approve the application.
The documented FBOT application is organic thermal oil. For hot water, submit pressure, temperature, suction and composition data to assess the appropriate series and sealing. A catalogue temperature limit does not authorize a change of service fluid.
Yes. Both manuals describe removal of the bearing assembly without disconnecting the piping from the casing. Access space, coupling and dismantling procedure must be checked against the drawing and instructions for the supplied assembly.
In this application, FBOT circulates the organic thermal oil in the plant’s heating system. For asphalt transfer, assess gear pump series and the heating configuration for that product. Identify the fluid in each circuit in the enquiry. Oil passing through FBOT must be free of abrasives and constituents that chemically attack the pump.
Review the related product lines and technical resources before specifying the equipment.
Tell us the fluid, temperature, viscosity, flow rate and pressure. Our team can review the application with you.
