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Saacke

Saacke FMB 25t/7bar

Name: Saacke Saacke FMB 25t/7bar
Brand: Saacke
SKU: OSE-78146

Saacke Saacke FMB 25t/7bar — HFO/MDO.

Inspector Detail

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Common issues

Burner nozzle fouling or coking from poor HFO atomisation or wrong viscosity at the burner
Furnace refractory cracking from thermal cycling
Soot deposits on fire-side tube surfaces reducing heat transfer efficiency
Feedwater/boiler water treatment excursions causing scale or corrosion
Safety valve seat leakage from wear or deposits
Economiser tube fouling or cold-end corrosion on sulphur-bearing fuel
Combustion air (FD) fan bearing wear
Flame scanner fouling causing nuisance trips

Inspection checklist

Fire-side tube soot deposit inspection
Water-side scale inspection at manhole/handhole openings
Safety valve lift and reseat test
Burner nozzle spray pattern and atomising pressure check
Boiler water chemistry test (alkalinity, chlorides, TDS, phosphate/oxygen scavenger residual)
Refractory condition check
Combustion analysis (O2, CO, smoke) at the burner
Low-water alarm and cut-out function test
Economiser tube condition where fitted

Service intervals

Boiler water chemistry test	daily to weekly per the class-approved treatment programme
Blowdown (bottom and surface)	daily or per watchkeeping routine
Safety valve function test	at each survey or per class requirement, typically annually
Burner nozzle cleaning/replacement	per running hours and fuel quality, commonly 500-1500 h
Internal inspection (fire-side and water-side)	annually or at the class survey interval
Low-water alarm/cut-out test	monthly and before each start after lay-up

Typical wear limits

Furnace/fire-side tube wall thickness	condemning limit is boiler-specific per class rules and original design thickness - confirm against the boiler's class-approved thickness gauging record
Safety valve set-pressure drift	acceptable tolerance is typically within a few percent of set pressure per class rules - confirm against the valve's certificate

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

Burner atomiser/nozzle set
Safety valve spare parts (seat/spring kit, or a complete spare valve)
Flame scanner
Feedwater pump seal kit
Gaskets for manhole/handhole covers
Boiler water treatment chemicals (correct type for this boiler)

Safety

Pressurised steam and hot surfaces - scalding risk at manhole/handhole and blowdown lines
Furnace explosion risk from unburnt fuel accumulation - always purge before relight
HFO handling at the burner - hot, pressurised fuel lines
Safety valve discharge path must be kept clear
Confined space entry for internal inspection - isolate, cool, and gas-free before entry

Class survey

Boilers are subject to periodical survey (internal and external) under the applicable class rules, including safety valve testing, thickness gauging where required, and confirmation that the water treatment log and blowdown records are being maintained.

Estimated lifetime: Marine auxiliary oil-fired boilers of this size are typically designed for a 20-25 year vessel life with tube renewals and periodic retubing as needed; actual longevity depends heavily on water treatment discipline and fuel quality.