Inert Gas Generator
critical
13 models total
An inert gas generator makes its own low-oxygen gas by burning fuel oil in a dedicated combustion chamber, rather than drawing flue gas from the ship's boiler, which is the arrangement most tankers without a constantly running oil-fired boiler need.
Read more — Inert Gas Generator explained ▾
What Makes This Type
An inert gas generator (IGG) burns marine diesel or fuel oil in its own combustion chamber to produce inert gas on demand, rather than tapping flue gas from the vessel's main boiler. This is the key difference from a flue gas inert gas system: a boiler-fed system depends on the boiler being lit and producing enough flue gas at the right oxygen content, which does not suit vessels that run their boiler intermittently or not at all in port. A dedicated generator is self-contained and can be started and stopped independent of the propulsion or steam plant, which is why it is the standard fit on product and chemical tankers and increasingly on LNG carriers needing inert gas for cargo tank atmosphere control separate from any boiler operation.
Main Components
- Combustion chamber and burner: burns fuel with a controlled, limited air supply to produce combustion gas low in oxygen, typically targeted below 5% by volume.
- Scrubber tower: cools the hot combustion gas and washes out sulphur compounds and particulates using seawater spray before the gas goes further into the system.
- Gas blower: draws the cooled, scrubbed gas forward through the deck main to the cargo tanks against the system's backpressure.
- Deck water seal: a non-return water seal on the deck line that prevents any flammable cargo vapour from finding its way back to the machinery space, the single most safety-critical component in the whole line.
- Oxygen analyser and pressure/flow instrumentation: continuously monitors gas quality supplied to the tanks and trips the system on high oxygen or other out-of-spec readings.
Selection and Sizing
Capacity is sized to the vessel's largest cargo tank discharge rate, since inert gas has to be supplied to the ullage space fast enough to replace the volume of cargo being discharged without letting tank pressure drop toward vacuum. Fuel consumption and turndown range matter for tankers doing frequent partial discharges rather than one full offload, since running a generator at minimum output for hours is harder on the burner than running it at design load. Scrubber water demand and the associated pump capacity are sized alongside the gas flow, not as an afterthought.
Regulations and Class
SOLAS Chapter II-2 requires inert gas systems on crude oil tankers, product carriers and chemical tankers above defined size thresholds, specifying maximum oxygen content in the supplied gas, deck seal arrangements and required alarms. Class rules require the deck water seal, non-return valves and oxygen analysers to be tested and the system proven to maintain tank atmosphere below 8% oxygen in normal operation before cargo work is permitted. Survey intervals cover the scrubber, blower and deck seal condition, since corrosion in the wetted gas path is the main degradation mechanism on this equipment.
Typical Faults
| Fault | Consequence |
|---|---|
| Deck water seal low level or blocked drain | Loss of the flame/vapour barrier between deck and engine room, a major safety breach |
| Scrubber packing fouling or corrosion | Poor gas cooling and sulphur removal, delivering hot, acidic gas into the deck main |
| Oxygen analyser drift or calibration lapse | False confidence in gas quality, cargo tanks inerted with gas that is not actually within spec |
| Blower bearing or seal wear | Reduced gas flow rate, unable to keep pace with discharge rate on a fast cargo operation |
What to Look for in a Supplier
- Type approval matching the specific cargo and tank arrangement the vessel trades with.
- Corrosion-resistant scrubber and ducting materials suited to continuous wet, acidic service, not a generic carbon steel build.
- Spares availability for the deck seal and oxygen analyser cell specifically, since these are the components surveyors check first.
Never trust the oxygen analyser reading alone before opening a tank - cross-check with a portable calibrated analyser at the tank hatch, since a fouled sample line on the fixed unit reads low oxygen even when the tank itself is not.
3 manufacturers · 13 models
Wärtsilä
9
Wärtsilä IG Generator IGG-2000
2000 m³/h
· Inert gas
Inert Gas System
combustion_ig_generator
Capacity (m³/h)
2000
Technical Specifications
- Gaskapazität
- Bis 20.000 Nm³/h Nennwert
- Sauerstoffgehalt
- 3% by volume (auf Basis Marine Destillat)
- Abgasdruck (normal)
- 0,12 bar gauge
- Gasaustrittstemperatur
- Max. 5°C über Seewassertemperatur
- Inertgasfeuchte
- 100% relative Feuchte, <1 g/kg Trockengas Wassertropfenanteil
- Brennstoffverbrauch
- 0,075 kg/Nm³ Gas (nominal)
- Seewasserbedarf
- 0,06 m³/Nm³ Gas (bei 32°C Seewassertemperatur)
- Betriebsdauer
- >20 Jahre Lebensdauer
Product Lines
- Moss IGG für Tanker (Produkt & Chemikalienöltanker)
- Moss IGG für Gastransporter (LNG Carrier)
- Moss Mult-Inert System (Dual-Mode: IG & Flue Gas)
- Moss Flue Gas System mit Topping-up Generator
- Offshore Inertgas-Pakete
Common Failures & Inspection Points
- Area: Scrubber-Rohrsystem Verschmutzung & KorrosionCheck: Visuelle Inspektion durch Mannlöcher auf Verschlammung, Korrosionsschäden, Ablagerungen; Überprüfung Düsen, Kühlrohre, Schwimmer, Sensoren, Demister-Elemente. Inspektionsfrequenz 6-12 Monate (verdoppelt bei kritischen Bedingungen). Eingang Trockendock inspizierbar (Scrubber-Abflussleitung).
- Area: Oxygen-Analyser Probeleitung Verstopfung durch KohlenstoffablagerungenCheck: Periodische Prüfung & Reinigung der Inertgas-Probeleitung zum O2-Analyzer (kritische Wartungsposition). Analyser selbst: 2-Punkt-Kalibrierung (Zero-Gas N₂ 0%, Span-Gas bekannte O₂-Konzentration) vor Betrieb. Kalibriergenauigkeit nach Hersteller. Alarmeinstellung: >8% O₂ Volumen.
- Area: Deck Water Seal Wasserniveau & FunktionsprüfungCheck: Überprüfung Wasserzufuhr (min. 2 separate Pumpen erforderlich). Sichtprüfung Wasserstand (mit Niedrigstand-Alarm ausgestattet). Inspektions-PMS-Intervall nach Hersteller; besondere Aufmerksamkeit bei IG-System-Abschaltung. Prüfung auf Blockade/Korrosion an Öffnungen.
- Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & FlammschutzCheck: Überprüfung Flammensiebe/Maschen (Ersatz nach PMS-Plan). Kalibrierung für erforderliche Druckwerte + Test bei Betriebsdruck durchführen. Flüssigkeitsgefüllte Breaker: Kontrollflüssigkeitstyp & Niveau; bei Frostgefahr Antifrost-Zusatz prüfen. Beschriftung mit Öff nungsdrücken & Flüssigkeitstyp/Konzentration + min. Betriebstemperatur.
- Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & VentilsitzCheck: Ventil zur Inspection öffnen. Prüfung auf Korrosion, Ventilsitz-Zustand, freie Ventilbewegung über volle Hublänge. Betriebsprobe im Service durchführen. Mindestens zwei Rückschlagvorrichtungen erforderlich (Deck Seal + Isolierventil). Kritisch für Hydrokarbon-Rückfluss-Verhinderung in Maschinenraum.
- Area: Brennkammer-Zustand & Lagerzustand Flue-Gas-Rückzirkulations-VentileCheck: Zugang zur Brennkammer über Klappfront (werkzeugfrei zugänglich — prüfen auf Verschleiß). Flue-Gas & Rezirkulationsventile regelmäßig stroben (Hubtest) wenn System außer Betrieb — Sicherstellen freier Betrieb über vollen Hubbereich. Inspektionsfrequenz nach Betriebshäufigkeit.
Typ-universelle Inspektions-/Wartungspunkte fuer Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.
Dedicated IG generator (fuel-fired)
Wärtsilä IG Generator IGG-5000
5000 m³/h
· Inert gas
Inert Gas System
combustion_ig_generator
Capacity (m³/h)
5000
Technical Specifications
- Gaskapazität
- Bis 20.000 Nm³/h Nennwert
- Sauerstoffgehalt
- 3% by volume (auf Basis Marine Destillat)
- Abgasdruck (normal)
- 0,12 bar gauge
- Gasaustrittstemperatur
- Max. 5°C über Seewassertemperatur
- Inertgasfeuchte
- 100% relative Feuchte, <1 g/kg Trockengas Wassertropfenanteil
- Brennstoffverbrauch
- 0,075 kg/Nm³ Gas (nominal)
- Seewasserbedarf
- 0,06 m³/Nm³ Gas (bei 32°C Seewassertemperatur)
- Betriebsdauer
- >20 Jahre Lebensdauer
Product Lines
- Moss IGG für Tanker (Produkt & Chemikalienöltanker)
- Moss IGG für Gastransporter (LNG Carrier)
- Moss Mult-Inert System (Dual-Mode: IG & Flue Gas)
- Moss Flue Gas System mit Topping-up Generator
- Offshore Inertgas-Pakete
Common Failures & Inspection Points
- Area: Scrubber-Rohrsystem Verschmutzung & KorrosionCheck: Visuelle Inspektion durch Mannlöcher auf Verschlammung, Korrosionsschäden, Ablagerungen; Überprüfung Düsen, Kühlrohre, Schwimmer, Sensoren, Demister-Elemente. Inspektionsfrequenz 6-12 Monate (verdoppelt bei kritischen Bedingungen). Eingang Trockendock inspizierbar (Scrubber-Abflussleitung).
- Area: Oxygen-Analyser Probeleitung Verstopfung durch KohlenstoffablagerungenCheck: Periodische Prüfung & Reinigung der Inertgas-Probeleitung zum O2-Analyzer (kritische Wartungsposition). Analyser selbst: 2-Punkt-Kalibrierung (Zero-Gas N₂ 0%, Span-Gas bekannte O₂-Konzentration) vor Betrieb. Kalibriergenauigkeit nach Hersteller. Alarmeinstellung: >8% O₂ Volumen.
- Area: Deck Water Seal Wasserniveau & FunktionsprüfungCheck: Überprüfung Wasserzufuhr (min. 2 separate Pumpen erforderlich). Sichtprüfung Wasserstand (mit Niedrigstand-Alarm ausgestattet). Inspektions-PMS-Intervall nach Hersteller; besondere Aufmerksamkeit bei IG-System-Abschaltung. Prüfung auf Blockade/Korrosion an Öffnungen.
- Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & FlammschutzCheck: Überprüfung Flammensiebe/Maschen (Ersatz nach PMS-Plan). Kalibrierung für erforderliche Druckwerte + Test bei Betriebsdruck durchführen. Flüssigkeitsgefüllte Breaker: Kontrollflüssigkeitstyp & Niveau; bei Frostgefahr Antifrost-Zusatz prüfen. Beschriftung mit Öff nungsdrücken & Flüssigkeitstyp/Konzentration + min. Betriebstemperatur.
- Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & VentilsitzCheck: Ventil zur Inspection öffnen. Prüfung auf Korrosion, Ventilsitz-Zustand, freie Ventilbewegung über volle Hublänge. Betriebsprobe im Service durchführen. Mindestens zwei Rückschlagvorrichtungen erforderlich (Deck Seal + Isolierventil). Kritisch für Hydrokarbon-Rückfluss-Verhinderung in Maschinenraum.
- Area: Brennkammer-Zustand & Lagerzustand Flue-Gas-Rückzirkulations-VentileCheck: Zugang zur Brennkammer über Klappfront (werkzeugfrei zugänglich — prüfen auf Verschleiß). Flue-Gas & Rezirkulationsventile regelmäßig stroben (Hubtest) wenn System außer Betrieb — Sicherstellen freier Betrieb über vollen Hubbereich. Inspektionsfrequenz nach Betriebshäufigkeit.
Typ-universelle Inspektions-/Wartungspunkte fuer Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.
Dedicated IG generator (fuel-fired)
Gas Carriers
Type
Marine Gas Solution
Application
LNG/LPG/Ethylene Gas Carriers
Approval
IGC Code
Functionality
Cargo handling, reliquefaction, fuel supply
Containment
Type A / B / C tanks per IGC
Compressors
Reciprocating piston / screw / centrifugal
Safety
Double-walled piping, leak detection, N2 purge
Offshore Solutions
Type
Fleet / Voyage Optimisation Software
Functions
Voyage planning, weather routing, fuel forecast
Reporting
CII, EEXI, EU MRV, IMO DCS
Data Sources
Sensor + AIS + weather
Connectivity
VSAT / 4G / Iridium
Wartsila Moss Inert Gas Generators For Gas Carriers
Type
Multi-Inert Gas System
Application
LPG / Chemical Gas Carriers
Inert Gas Sources
Combustion + Nitrogen generation
O2 Content
< 2 %
Approval
IGC Code
Inert Gas
Type
Inert Gas System
Application
Tankers and gas carriers
O2 Content (output)
< 5 %
Capacity Range
500 - 20000 Nm³/h
Approval
SOLAS, IGC Code
Offshore Inert Gas Packages
Type
Inert Gas System
Application
Tankers and gas carriers
O2 Content (output)
< 5 %
Capacity Range
500 - 20000 Nm³/h
Approval
SOLAS, IGC Code
Wartsila Moss Mult Inert Systems
Type
Inert Gas System
Application
Tankers and gas carriers
O2 Content (output)
< 5 %
Capacity Range
500 - 20000 Nm³/h
Approval
SOLAS, IGC Code
Inert Gas Generator (IGG)
2,000-50,000 m³/h IG
· Inert Gas (N2-rich flue gas, <5% O2)
Voltage: 380-440V 3ph
Type
Inert Gas Generator (Combustion Type)
Size Range
- IGG-2000
- IGG-5000
- IGG-10000
- IGG-25000
- IGG-50000
Drive Type
Oil-Fired Combustion
Construction
Combustion chamber, scrubber tower, demister, blower, O2 analyzer
Technical Specifications
- Gaskapazität
- Bis 20.000 Nm³/h Nennwert
- Sauerstoffgehalt
- 3% by volume (auf Basis Marine Destillat)
- Abgasdruck (normal)
- 0,12 bar gauge
- Gasaustrittstemperatur
- Max. 5°C über Seewassertemperatur
- Inertgasfeuchte
- 100% relative Feuchte, <1 g/kg Trockengas Wassertropfenanteil
- Brennstoffverbrauch
- 0,075 kg/Nm³ Gas (nominal)
- Seewasserbedarf
- 0,06 m³/Nm³ Gas (bei 32°C Seewassertemperatur)
- Betriebsdauer
- >20 Jahre Lebensdauer
Product Lines
- Moss IGG für Tanker (Produkt & Chemikalienöltanker)
- Moss IGG für Gastransporter (LNG Carrier)
- Moss Mult-Inert System (Dual-Mode: IG & Flue Gas)
- Moss Flue Gas System mit Topping-up Generator
- Offshore Inertgas-Pakete
Common Failures & Inspection Points
- Area: Scrubber-Rohrsystem Verschmutzung & KorrosionCheck: Visuelle Inspektion durch Mannlöcher auf Verschlammung, Korrosionsschäden, Ablagerungen; Überprüfung Düsen, Kühlrohre, Schwimmer, Sensoren, Demister-Elemente. Inspektionsfrequenz 6-12 Monate (verdoppelt bei kritischen Bedingungen). Eingang Trockendock inspizierbar (Scrubber-Abflussleitung).
- Area: Oxygen-Analyser Probeleitung Verstopfung durch KohlenstoffablagerungenCheck: Periodische Prüfung & Reinigung der Inertgas-Probeleitung zum O2-Analyzer (kritische Wartungsposition). Analyser selbst: 2-Punkt-Kalibrierung (Zero-Gas N₂ 0%, Span-Gas bekannte O₂-Konzentration) vor Betrieb. Kalibriergenauigkeit nach Hersteller. Alarmeinstellung: >8% O₂ Volumen.
- Area: Deck Water Seal Wasserniveau & FunktionsprüfungCheck: Überprüfung Wasserzufuhr (min. 2 separate Pumpen erforderlich). Sichtprüfung Wasserstand (mit Niedrigstand-Alarm ausgestattet). Inspektions-PMS-Intervall nach Hersteller; besondere Aufmerksamkeit bei IG-System-Abschaltung. Prüfung auf Blockade/Korrosion an Öffnungen.
- Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & FlammschutzCheck: Überprüfung Flammensiebe/Maschen (Ersatz nach PMS-Plan). Kalibrierung für erforderliche Druckwerte + Test bei Betriebsdruck durchführen. Flüssigkeitsgefüllte Breaker: Kontrollflüssigkeitstyp & Niveau; bei Frostgefahr Antifrost-Zusatz prüfen. Beschriftung mit Öff nungsdrücken & Flüssigkeitstyp/Konzentration + min. Betriebstemperatur.
- Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & VentilsitzCheck: Ventil zur Inspection öffnen. Prüfung auf Korrosion, Ventilsitz-Zustand, freie Ventilbewegung über volle Hublänge. Betriebsprobe im Service durchführen. Mindestens zwei Rückschlagvorrichtungen erforderlich (Deck Seal + Isolierventil). Kritisch für Hydrokarbon-Rückfluss-Verhinderung in Maschinenraum.
- Area: Brennkammer-Zustand & Lagerzustand Flue-Gas-Rückzirkulations-VentileCheck: Zugang zur Brennkammer über Klappfront (werkzeugfrei zugänglich — prüfen auf Verschleiß). Flue-Gas & Rezirkulationsventile regelmäßig stroben (Hubtest) wenn System außer Betrieb — Sicherstellen freier Betrieb über vollen Hubbereich. Inspektionsfrequenz nach Betriebshäufigkeit.
Typ-universelle Inspektions-/Wartungspunkte fuer Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.
Service: O2 analyzer calibration before each tank operation. Scrubber inspection annually. Refractory inspection at drydock. Demister pad replacement every 2-3 years. Blower maintenance quarterly.
Spare Parts: Wärtsilä/Hamworthy Gas Systems. Lead time: 3-6 weeks. O2 analyzer sensors: keep onboard.
Alfa Laval
3
Alfa Laval IG Generator 3000
3000 m³/h
· Inert gas
Inert Gas System
combustion_ig_generator
Capacity (m³/h)
3000
Technical Specifications
- Oxygen Output Range
- 2-4% O2 (Combustion type)
- Gas Production Capacity
- 1000-20,000 m³/h (Smit Combustion); 3000-22,500 m³/h (Smit LNG/LPG)
- Operating Pressure
- 0.15-0.25 bar(g) Combustion; up to 0.4 bar(g) LNG/LPG
- Scrubber Type
- Wet scrubber with spray cooling and water demisting
- Fuel Consumption
- Minimized via Ultramizing system; AFEM upgrade reduces by up to 40%
- Analyzer Type
- Combustion-process oxygen analyzer (SMIT7000/AAL7000 available as upgrade)
Product Lines
- Smit Combustion (FU-Type)
- Smit LNG/LPG
- Smit Flue Gas
- Smit Combinert
Common Failures & Inspection Points
- Area: Scrubber fouling, corrosion, blocked spray nozzles, demister damageCheck: Visual inspection through scrubber manholes; check spray nozzles for blockage (impairs cooling efficiency); inspect cooling pipes, floats, sensors for corrosion or soot deposits; verify cooling water flow and demister function
- Area: Deck seal water level loss, gauge glass fouling, seal integrity compromiseCheck: Verify gauge glass is clean and water level visible; check high/low level alarm float switches operational; inspect for water leakage, corrosion; in cold weather verify heating coil function and trace heating active; confirm low-level alarm functions
- Area: P/V breaker seal loss, incorrect relief pressure setting, glycol/water mixture degradationCheck: Verify P/V breaker opens at preset pressure/vacuum; check sight glass and fluid level (glycol-water mixture); inspect for leakage around valve stem; test differential pressure response; replace fluid if discolored/contaminated
- Area: Oxygen analyzer drift, calibration loss, sensor fouling or failureCheck: Calibrate analyzer ≥24 hrs before cargo operations; log calibration results; verify O2 readout 2-4% during operation; replace probe/sensor if drift >0.5%; ensure analyzer sample line clear and inlet not fouled
- Area: Combustion process inefficiency, incomplete fuel combustion, soot generationCheck: Observe flue gas color (should be colorless/light gray, not black); monitor fuel/air ratio; inspect burner nozzles and air registers for clogging; verify combustion oxygen ≤4%; check fuel pump pressure/flow; inspect ignition electrode condition
- Area: Non-return valve (check valve) function loss, backflow risk to engine roomCheck: Confirm non-return valves at deck seal outlet prevent backflow; verify pressure differential across deck seal maintained; listen for flow disturbance; schedule valve seat/seal inspection per Condition Audit; test with pressure gauge if vessel equipped
Typ-universelle Inspektions-/Wartungspunkte fuer Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.
Dedicated IG generator (fuel-fired)
Alfa Laval IG Generator 7000
7000 m³/h
· Inert gas
Inert Gas System
combustion_ig_generator
Capacity (m³/h)
7000
Technical Specifications
- Oxygen Output Range
- 2-4% O2 (Combustion type)
- Gas Production Capacity
- 1000-20,000 m³/h (Smit Combustion); 3000-22,500 m³/h (Smit LNG/LPG)
- Operating Pressure
- 0.15-0.25 bar(g) Combustion; up to 0.4 bar(g) LNG/LPG
- Scrubber Type
- Wet scrubber with spray cooling and water demisting
- Fuel Consumption
- Minimized via Ultramizing system; AFEM upgrade reduces by up to 40%
- Analyzer Type
- Combustion-process oxygen analyzer (SMIT7000/AAL7000 available as upgrade)
Product Lines
- Smit Combustion (FU-Type)
- Smit LNG/LPG
- Smit Flue Gas
- Smit Combinert
Common Failures & Inspection Points
- Area: Scrubber fouling, corrosion, blocked spray nozzles, demister damageCheck: Visual inspection through scrubber manholes; check spray nozzles for blockage (impairs cooling efficiency); inspect cooling pipes, floats, sensors for corrosion or soot deposits; verify cooling water flow and demister function
- Area: Deck seal water level loss, gauge glass fouling, seal integrity compromiseCheck: Verify gauge glass is clean and water level visible; check high/low level alarm float switches operational; inspect for water leakage, corrosion; in cold weather verify heating coil function and trace heating active; confirm low-level alarm functions
- Area: P/V breaker seal loss, incorrect relief pressure setting, glycol/water mixture degradationCheck: Verify P/V breaker opens at preset pressure/vacuum; check sight glass and fluid level (glycol-water mixture); inspect for leakage around valve stem; test differential pressure response; replace fluid if discolored/contaminated
- Area: Oxygen analyzer drift, calibration loss, sensor fouling or failureCheck: Calibrate analyzer ≥24 hrs before cargo operations; log calibration results; verify O2 readout 2-4% during operation; replace probe/sensor if drift >0.5%; ensure analyzer sample line clear and inlet not fouled
- Area: Combustion process inefficiency, incomplete fuel combustion, soot generationCheck: Observe flue gas color (should be colorless/light gray, not black); monitor fuel/air ratio; inspect burner nozzles and air registers for clogging; verify combustion oxygen ≤4%; check fuel pump pressure/flow; inspect ignition electrode condition
- Area: Non-return valve (check valve) function loss, backflow risk to engine roomCheck: Confirm non-return valves at deck seal outlet prevent backflow; verify pressure differential across deck seal maintained; listen for flow disturbance; schedule valve seat/seal inspection per Condition Audit; test with pressure gauge if vessel equipped
Typ-universelle Inspektions-/Wartungspunkte fuer Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.
Dedicated IG generator (fuel-fired)
Smit Inert Gas System (Flue Gas Type)
5,000-100,000 m³/h IG
· Inert Gas (from boiler flue gas)
Voltage: 380-440V
Type
Flue Gas Type Inert Gas System
Size Range
- FGIG-5000
- FGIG-20000
- FGIG-50000
- FGIG-100000
Drive Type
Passive (boiler flue gas) + Blower
Construction
Flue gas take-off from boiler, scrubber, cooler, demister, blower
Technical Specifications
- Oxygen Output Range
- 2-4% O2 (Combustion type)
- Gas Production Capacity
- 1000-20,000 m³/h (Smit Combustion); 3000-22,500 m³/h (Smit LNG/LPG)
- Operating Pressure
- 0.15-0.25 bar(g) Combustion; up to 0.4 bar(g) LNG/LPG
- Scrubber Type
- Wet scrubber with spray cooling and water demisting
- Fuel Consumption
- Minimized via Ultramizing system; AFEM upgrade reduces by up to 40%
- Analyzer Type
- Combustion-process oxygen analyzer (SMIT7000/AAL7000 available as upgrade)
Product Lines
- Smit Combustion (FU-Type)
- Smit LNG/LPG
- Smit Flue Gas
- Smit Combinert
Common Failures & Inspection Points
- Area: Scrubber fouling, corrosion, blocked spray nozzles, demister damageCheck: Visual inspection through scrubber manholes; check spray nozzles for blockage (impairs cooling efficiency); inspect cooling pipes, floats, sensors for corrosion or soot deposits; verify cooling water flow and demister function
- Area: Deck seal water level loss, gauge glass fouling, seal integrity compromiseCheck: Verify gauge glass is clean and water level visible; check high/low level alarm float switches operational; inspect for water leakage, corrosion; in cold weather verify heating coil function and trace heating active; confirm low-level alarm functions
- Area: P/V breaker seal loss, incorrect relief pressure setting, glycol/water mixture degradationCheck: Verify P/V breaker opens at preset pressure/vacuum; check sight glass and fluid level (glycol-water mixture); inspect for leakage around valve stem; test differential pressure response; replace fluid if discolored/contaminated
- Area: Oxygen analyzer drift, calibration loss, sensor fouling or failureCheck: Calibrate analyzer ≥24 hrs before cargo operations; log calibration results; verify O2 readout 2-4% during operation; replace probe/sensor if drift >0.5%; ensure analyzer sample line clear and inlet not fouled
- Area: Combustion process inefficiency, incomplete fuel combustion, soot generationCheck: Observe flue gas color (should be colorless/light gray, not black); monitor fuel/air ratio; inspect burner nozzles and air registers for clogging; verify combustion oxygen ≤4%; check fuel pump pressure/flow; inspect ignition electrode condition
- Area: Non-return valve (check valve) function loss, backflow risk to engine roomCheck: Confirm non-return valves at deck seal outlet prevent backflow; verify pressure differential across deck seal maintained; listen for flow disturbance; schedule valve seat/seal inspection per Condition Audit; test with pressure gauge if vessel equipped
Typ-universelle Inspektions-/Wartungspunkte fuer Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.
Service: O2 analyzer calibration before each operation. Deck seal water level check every watch. Scrubber inspection annually. Non-return valve test quarterly.
Spare Parts: Alfa Laval (ehem. Smit Gas). Lead time: 3-6 weeks.
Kangrim Heavy Industries (South Korea)
1
Inert Gas Generator
2,000-30,000 m³/h IG
· Inert Gas
Voltage: 380-440V
Type
Inert Gas Generator (Combustion Type)
Size Range
- KIG-2000
- KIG-5000
- KIG-10000
- KIG-30000
Drive Type
Oil-Fired Combustion
Construction
Combustion chamber, scrubber, demister, blower
Common Failures & Inspection Points
- Same as Wärtsilä/Hamworthy — scrubber corrosion, refractory, O2 analyzer drift
Service: Standard IGG maintenance per Kangrim manual.
Spare Parts: Kangrim (Changwon, Korea). Lead time: 3-6 weeks.