FBCN Technical Manual
Standardized Centrifugal Pump — Per ASME B73.1 and API 610 (12th ed.) — back-pull-out construction
The FBCN series is a standardized centrifugal pump (per ASME B73.1 and API 610 12th ed.) with back-pull-out construction: the rotor+bearing assembly is removed without disconnecting or realigning the piping. Wide flow coverage for industrial processes with clean or turbid liquids.
FBCN series specifications
Industrial applications covered by this manual
FBCN technical manual contents
- 1Quick Selection Table
- 2General Pump Characteristics
- 3Power Reserve
- 4Pressure × Max Temperature Limit
- 5Accessories
- 6Peripheral Speed
- 7Efficiency Reduction
- 8Cutaway Drawing
- 9Parts List
- 10Sealing Chamber Details per Application
- 11Auxiliary Connections
- 12Dimensional
Construction features
- Spiral body cast in single piece, supported on its own feet, with wear ring on suction side
- Radial single-suction impeller with wear ring on pressure side (except models 25-150, 32-125 and 32-125.1)
- Shaft with protection sleeve in the sealing region
- Back-pull-out construction — bearing is removed without dismantling piping
- Flanges: Cast Iron ANSI B16.1 125 Lb FF or 250 Lb FF · Carbon Steel/Ductile ANSI B16.1 250 Lb RF or ANSI B16.5 150 Lb RF · Stainless Steel ANSI B16.5 150 Lb RF
- Hydrostatic test pressure: per ASME B73.1
Sealing options
- Gland packing — up to 105°C at 125 lbs (16 bar at 250 lbs)
- Mechanical seal — up to 90°C, 10 bar
- Sealing chamber per application (see manual)
Available materials
Who is this manual for
Process engineers, maintenance teams and designers who need to minimize downtime (back-pull-out reduces plant downtime hours).
When to use
Read for sizing (flow × head tables, pressure × temperature limits), preventive maintenance planning and selection of sealing chamber appropriate to the fluid.
Download the FBCN technical manual now
Official FB Bombas document — 15 pages PDF · 460 KB
Related technical articles
Reading material from FB engineering on this line — concrete calculations, selection criteria and Brazilian market context.
- Engineering7 min read
Fire Pump Room: Environment Requirements, Components and the Path to Approval
The pump room is the heart of the fire-fighting system — and the most failed room at inspection. Manufacturer guide: what NFPA 20 requires from the environment (fire-rated separation, temperature, ventilation, drainage), what goes inside, when the pre-assembled skid simplifies the job and how the state instruction leads the system to approval.
Read article - Maintenance7 min read
NFPA 25: Fire Pump Inspection, Testing and Maintenance — Weekly Test, Annual Test and the Records Inspections Demand
A fire pump sits idle for years and must work perfectly on the one day it is needed. NFPA 25 is the standard that guarantees this: it defines the periodic no-flow test, the annual flow test and the pump house inspections. A manufacturer guide to the routine that keeps the system alive — and the fire certificate valid.
Read article - Engineering7 min read
NBR 16704: Stationary Fire Pump Sets — Requirements, Performance Curve and Acceptance
NBR 16704 is the Brazilian standard for the stationary pump sets that pressurize sprinklers and fire networks. A manufacturer guide to what it requires: which pumps are accepted, which performance curve the set must meet, the role of the jockey pump and the tests that prove it all at acceptance.
Read article
