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SAACKE

Flue Gas IG IG-N2 8000 O2<2%

Name: SAACKE Flue Gas IG IG-N2 8000 O2<2%
Brand: SAACKE
SKU: OSE-94427

SAACKE Flue Gas IG IG-N2 8000 O2<2% — 28000 m³/h capacity.

Inspector Detail

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Common issues

Scrubber tower packing fouling with soot/particulate, reducing SO2 and particulate removal effectiveness
Deck water seal running low or blocked, allowing possible backflow of flue gas toward the engine/boiler uptake
O2 analyzer drift or sensor fouling giving falsely low O2 readings
Fan/blower bearing wear from continuous duty in a moist, corrosive gas stream
Non-return valve sticking closed or open due to soot/scale deposits
Corrosion of ductwork and scrubber shell from wet, acidic flue gas condensate
Deck seal water pump failure or strainer clogging
Automatic deck isolating/pressure control valve sticking or slow to respond

Inspection checklist

Verify O2 content at the deck seal outlet with an independent portable analyzer, cross-checked against the fixed unit
Check scrubber water flow, drainage and general condition
Function-test deck water seal level and float switches
Function-test non-return valves and the pressure/vacuum breaker
Trend blower vibration and bearing temperature
Inspect ductwork and scrubber shell for corrosion, with spot wall-thickness checks in known wear areas
Test the high-O2 alarm and automatic shutdown/isolation sequence
Confirm remote/mimic panel readings match local instruments
Check deck seal water supply pump changeover and low-level alarm

Service intervals

Deck seal water strainer	cleaned weekly and after each use
O2 analyzer calibration	monthly, per manufacturer's procedure
Scrubber packing inspection	annually or per class requirement
Blower bearing condition check	per running-hour interval in the maker's manual, commonly every 2000-4000 hours
Non-return valve overhaul	at each dry-docking or class survey
Full IGS function test (high-O2 alarm, automatic shutdown)	before each cargo operation requiring inert gas

Typical wear limits

Deck seal water level	maintained within the range marked on the unit's own nameplate/manual - confirm the specific figure there
Non-return valve seat leakage	no visible leakage past the seat during the manufacturer's static pressure test procedure
Ductwork wall thickness	assessed against original as-built thickness per class CSM requirements - typically renewal is considered around a 10-20% reduction, confirm with class

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

Critical spares

O2 analyzer sensor/cell
Deck seal water level float switch
Non-return valve seat/disc set
Blower bearing set
Scrubber spray nozzles
Deck seal water pump seal kit

Safety

Flammable atmosphere risk in cargo tanks if O2 exceeds the safe limit undetected - never bypass the O2 alarm/trip
Hot flue gas duct and scrubber surfaces present a burn hazard
Confined space entry required for internal inspection of the scrubber tower/deck seal
Backflow of flammable gas toward the engine/boiler room if a non-return valve fails

Class survey

IGS is normally within the Continuous Survey Machinery (CSM) or annual survey scope on tankers. Class will want function-test records for the high-O2 alarm/trip, deck seal operation and non-return valve integrity, plus traceable O2 analyzer calibration records.

Estimated lifetime: Deck seal and scrubber shell components typically last 15-20 years with proper corrosion control; blower/fan units are often overhauled or replaced within 10-15 years. Actual life depends strongly on flue gas sulfur content and maintenance quality.