1. What a complete FB Bombas skid contains
The component list of a complete fire-fighting skid delivered by FB Bombas is long, and each item is selected and pre-specified so the assembly functions as a cohesive unit from delivery moment. The central component is the FBCN centrifugal pump, selected per project hydraulic demand and compliant with the NFPA 20 150%/65% envelope.
Alongside it comes the IP55 class F insulated electric motor, or the listed diesel engine (MWM, Cummins, Scania) in configurations with diesel reserve, with flexible coupling already laser-aligned on the bench — one of the most expensive and time-consuming services when executed in the field.
The skid also includes the vertical multi-stage stainless jockey pump (sized at 1% of main flow), the NFPA 20 or NBR 16704 Annex C controller already wired and tested, all NFPA-mandatory valves (OS&Y suction valve with electrical and mechanical supervision, discharge check valve, main relief valve, circulation relief valve, drain valve), the suction strainer, damped suction and discharge gauges, test header with 2½" hydrants sized for rated flow, and the welded-profile structural steel base with grouting points prepared for installation on the pump house floor.
For diesel engine configurations, add the 8-hour fuel tank, two batteries with separate chargers, exhaust system, and all wiring between engine and controller.
2. Factory vs. field assembly: a numerical comparison
The decision between buying a pre-assembled skid or buying loose equipment and assembling in the field seems, at first glance, a price question — the skid is slightly more expensive due to factory service. But when considering construction time, alignment quality, rework, and commissioning risk, the calculation changes completely.
A typical pre-assembled skid takes 3 to 5 business days to be installed in the field: site arrival, positioning, base grouting, connecting suction and discharge piping, electrical (or fuel for diesel) connection, and final commissioning.
Traditional piece-by-piece assembly takes 4 to 6 weeks considering alignment time (each component must be aligned in the field, often in a dusty noisy environment), individual testing, component integration, and debugging of problems that appear only during integration.
The time difference has direct consequences on overall construction schedule. A commercial or industrial building that depends on AVCB to start operating cannot be enabled without a commissioned fire-fighting system. Each week of delay in commissioning is a week of delay in commercial operation start — with revenue loss that, on large projects, easily exceeds by an order of magnitude the price difference between skid and loose assembly.
That is why the correct calculation is not "skid is more expensive than separate components" but rather "skid reduces total project time by 3 to 5 weeks and eliminates rework." Under this lens, the skid is practically always the economically correct choice.
3. Laser alignment on the bench: quality the field cannot replicate
Alignment between pump and motor is one of the most critical services for the entire assembly's service life. A poorly aligned set operates with excessive vibration, wears bearings and seals in months rather than years, and frequently fails catastrophically on first activation under real load. NFPA 20 and good engineering practice require alignment tolerance of 0.05 mm radial and 0.1 mm angular measured after stabilization.
These tolerances are perfectly achievable on the factory bench with laser alignment tools (Pruftechnik, SKF or equivalent), but very difficult to maintain in the field, where the floor may not be level, ambient temperature varies, and the assembly team often works under schedule pressure.
In FB Bombas pre-assembled skids, alignment is done on the bench with equipment in controlled condition, by laser, documented in a report accompanying the skid at delivery. After alignment, the assembly is secured to the metal base with calibrated bolts, and the entire base is transported as a rigid unit to the site.
When the skid arrives, the installer only needs to position it on previously prepared anchors, grout the base to level any small pump house floor imperfection, and confirm alignment after 24 hours of rest. There is no field realignment — only verification.
4. Traceability and integrated documentation
Each complete skid delivered by FB Bombas receives a unique serial number registered in the internal system and archived for at least 20 years. This number traces the entire skid history: which components were used (serial number of each pump, motor, controller, valve), when they were tested, what were the bench test results, who executed each assembly step, what was the shipping date, and eventually who performed maintenance and when.
This traceability is not bureaucracy — it is one of the quality requirements demanded by large industrial customers (Petrobras, Vale, Ambev, Souza Cruz) and by international insurer audits (FM Global, Zurich).
Documentation accompanying a complete skid includes: signed manufacturing certificate, bench test report with documented H-Q-η-NPSHr curve, casing hydrostatic report, motor INMETRO certification, UL or NBR 16704 controller certification, Portuguese operation manual, NFPA 25 maintenance plan, complete electrical and hydraulic schematics, spare parts list with codes, and conformity declaration. All this documentation is prepared during the manufacturing process and delivered in a single package at shipment — the customer does not need to chase anything.
For AVCB obtainment and insurer audit, this documentation is practically everything the technical responsible needs to present.
5. Assembly in Cabreúva-SP since the 1990s
FB Bombas began supplying complete pre-assembled fire-fighting skids in the 1990s, following two simultaneous Brazilian market trends: the expansion of logistics distribution centers and large-scale industrial plants, and the entry of international insurers demanding strict NFPA 20 compliance on high-insured-value assets. Before that decade, the Brazilian standard allowed much variation in fire-fighting system configuration, and piece-by-piece field assembly was acceptable for most cases.
With increased technical requirements, factory-integrated assembly became the only practical way to ensure consistent standard compliance.
The Cabreúva-SP plant is the physical point where all this process happens. The factory has a dedicated fire-fighting skid assembly bench, separate from the process pump area, with laser alignment tools, integrated hydraulic test bench, electrical bench for complete controller testing, and a critical component storage area (motors, batteries, fuel tanks) to reduce lead time. Skids leave the factory already tested, documented and loaded on trucks for transport to the site.
Typical lead time is 8 to 12 weeks for electric configurations and 12 to 16 weeks when the system includes a diesel engine or client-specific integrations, counted from order confirmation — significantly faster than the field option when considering the total construction schedule.
