IG Scrubber/Dryer

medium 24 models total

The scrubber and dryer sit between the inert gas generator and the tank main, and their only job is to take flue gas that is hot, wet and full of sulphur compounds and hand the deck seal something cool, dry and clean enough not to corrode the cargo tanks it protects.

Read more — IG Scrubber/Dryer explained ▾

What the scrubber/dryer stage does within an inert gas system

Raw flue gas from a combustion-type or dedicated inert gas generator arrives at roughly 250-350°C, carrying soot, sulphur dioxide and moisture. None of that can go straight into a cargo tank: the heat would damage tank coatings and seals, the SO2 combines with water to form corrosive sulphurous acid, and excess moisture raises the risk of condensation inside the tank. The scrubber tower washes the gas with sea water to cool it and strip out particulates and much of the SO2; a downstream demister or dryer stage removes the water droplets the scrubbing process itself introduces, so the gas leaving for the deck seal is both cool and reasonably dry.

Inert gas scrubber and dryer — Cross-section of an IG scrubber/dryer tower: flue gas enters low, rises through a seawater spray section and a demister pad, and leaves cooled and dried at the top while wash water collects in the sump and drains overboard.

Main components

Scrubber tower and spray system

A packed or spray-tower vessel where sea water is sprayed counter-current to the rising flue gas, typically dropping gas temperature to within a few degrees of the sea water temperature while washing out soot and dissolving sulphur dioxide. Spray nozzles and packing material are the main wear items, since they sit in a continuous stream of acidic, particulate-laden water.

Demister / dryer section

Mesh pad or vane-type demisters strip entrained water droplets from the gas before it reaches the blower and deck seal. Some systems add a separate drying stage to reduce moisture further, since a wet gas stream promotes corrosion all the way along the deck main to the tank.

Effluent and drain system

Scrubber wash water, now acidic and carrying soot, is discharged overboard through a dedicated effluent line, subject to its own discharge criteria distinct from oily water separator effluent.

Regulations and class

The IG system as a whole, including the scrubber, falls under SOLAS Chapter II-2 requirements for inert gas on tankers, and IACS unified requirements set performance criteria for oxygen content and gas quality leaving the plant, typically requiring the system to reliably deliver gas with oxygen content at or below 5% by volume. Scrubber effluent discharge is addressed under MARPOL, and class surveys check the scrubber's ability to actually cool and clean the gas to specification, not just that the plant runs.

Typical faults

Fault	Consequence
Scrubber spray nozzles blocked or worn from continuous acidic flow	Poor gas cooling and washing, letting hot, sulphur-laden gas through toward the deck seal
Demister pad fouled with soot and salt buildup	Wet gas carries over to the deck main, accelerating corrosion of piping and valves
Sea water supply pump undersized or fouled strainer restricting flow	Inadequate cooling raises delivered gas temperature above design limits
Effluent line partially blocked with accumulated soot sludge	Back-pressure in the scrubber disturbs the water level and gas flow through the tower

Typical wear and inspection points

Spray nozzle condition and coverage pattern, checked visually whenever the tower is opened.
Demister pad cleanliness and pressure drop across the section, an early indicator of fouling before gas quality actually suffers.
Internal coating and corrosion condition of the scrubber shell itself, since it runs permanently wet with acidic water.
Level control and drain valve operation, since a flooded or dry scrubber both disrupt gas flow to the deck seal.

What to look for in a supplier

Materials of construction suited to continuous acidic sea water service — coating specification matters as much as vessel size.
Spare nozzle and demister pad kits sized to the specific tower model rather than a generic fit.
Documentation supporting the gas quality performance the system is expected to deliver, for class renewal.

Track the pressure drop across the demister over time rather than waiting for a gas quality alarm — a rising differential is the earliest warning that fouling is building up before it starts letting wet gas through to the deck seal.

Inspector Mode Show All 24 total

4 manufacturers · 24 models

Alfa Laval

IG Scrubber/Dryer 2000m3h

Capacity (m³/h)

2000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 damage
Check: 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 compromise
Check: 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 degradation
Check: 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 failure
Check: 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 generation
Check: 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 room
Check: 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

Type-universal inspection/service points for Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 3000m3h

Capacity (m³/h)

3000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 damage
Check: 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 compromise
Check: 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 degradation
Check: 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 failure
Check: 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 generation
Check: 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 room
Check: 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

Type-universal inspection/service points for Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 5000m3h

Capacity (m³/h)

5000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 damage
Check: 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 compromise
Check: 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 degradation
Check: 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 failure
Check: 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 generation
Check: 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 room
Check: 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

Type-universal inspection/service points for Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 8000m3h

Capacity (m³/h)

8000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 damage
Check: 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 compromise
Check: 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 degradation
Check: 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 failure
Check: 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 generation
Check: 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 room
Check: 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

Type-universal inspection/service points for Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 10000m3h

Capacity (m³/h)

10000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 damage
Check: 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 compromise
Check: 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 degradation
Check: 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 failure
Check: 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 generation
Check: 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 room
Check: 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

Type-universal inspection/service points for Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 15000m3h

Capacity (m³/h)

15000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 damage
Check: 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 compromise
Check: 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 degradation
Check: 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 failure
Check: 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 generation
Check: 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 room
Check: 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

Type-universal inspection/service points for Inert Gas Systems (Alfa Laval, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

Manufacturer Datasheet

Datasheet

Mahler AGS

IG Scrubber/Dryer 2000m3h

Capacity (m³/h)

2000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Technical Specifications

Nitrogen Purity: Up to 99.99 vol.-% (purities 95-99.99% typical for marine cargo inerting)
Capacity Range: 200 to 4,000 Nm³/h
Product Pressure: 6-9 bar(abs) at outlet
Dew Point: Minimum -40°C and below
Residual O2 Content: Down to 100 ppmv (higher purities on demand)
Technology: Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS)

Product Lines

NITROSWING PSA Nitrogen Plants
NITROSWING Modular Design Systems

Common Failures & Inspection Points

Area: Carbon Molecular Sieve (CMS) Degradation
Check: Annual full inspection: Check CMS bed condition, verify no moisture exposure (degrades sieve lifespan 10+ years; oil contamination reduces lifespan significantly); quarterly checks of N2 purity/flow rate and sieve replacement need. Pre-filters for moisture/oil removal must be inspected and replaced timely.
Area: Oxygen Analyzer Sampling Line Blockage
Check: Periodic inspection and CLEANING of O2 analyzer sampling pipes (at least twice yearly per updated procedures after carbon deposit incidents) to prevent partial clogging. Verify sampling line integrity, check for carbon deposits from IGG scrubber. Analyzer must trigger alarm at O2 > 8%.
Area: Deck Water Seal Integrity & Heating System
Check: Internal inspection of deck seal: check Venturi non-return valves/orifice plates for corrosion/damage (excessive water carryover to tanks); inspect inlet pipe/housing for corrosion/cracks; check heating coil condition. In cold weather zones, verify deck seal heating system operational. Test seal alarms.
Area: Activated Carbon Pre-Filter Contamination
Check: Check activated carbon tower for oil/moisture/foreign material accumulation (activated carbon prevents contaminants entering PSA unit). Inspect air dryer & filter units functionality. Replace pre-filters according to maintenance schedule if lubricated air is used. Monitor pressure drop across filters.
Area: P/V Valve (Pressure/Vacuum) Weight Mechanism Freeze
Check: Pre-operation inspection (especially cold weather): check P/V valve weight mechanism for freeze-in/sticking to seat. Verify non-return valve function to prevent cargo tank backflow. Test automatic shut-down systems. Confirm valve operability before each voyage commencement.
Area: Pressure Vessel Integrity & Adsorption Towers
Check: Annual inspection of dual adsorption towers (filled with CMS) for structural integrity, corrosion, or damage. Verify tower seals/connections integrity. Check product quality downstream (N2 purity/flow); if degraded, towers may need CMS bed replacement. Pressure test vessels per classification society rules.

Generic type inspection/maintenance points for Inert Gas Systems (Mahler AGS, Mega-Swarm 2026-06). Per-model specs not auto-populated.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 3000m3h

Capacity (m³/h)

3000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Technical Specifications

Nitrogen Purity: Up to 99.99 vol.-% (purities 95-99.99% typical for marine cargo inerting)
Capacity Range: 200 to 4,000 Nm³/h
Product Pressure: 6-9 bar(abs) at outlet
Dew Point: Minimum -40°C and below
Residual O2 Content: Down to 100 ppmv (higher purities on demand)
Technology: Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS)

Product Lines

NITROSWING PSA Nitrogen Plants
NITROSWING Modular Design Systems

Common Failures & Inspection Points

Area: Carbon Molecular Sieve (CMS) Degradation
Check: Annual full inspection: Check CMS bed condition, verify no moisture exposure (degrades sieve lifespan 10+ years; oil contamination reduces lifespan significantly); quarterly checks of N2 purity/flow rate and sieve replacement need. Pre-filters for moisture/oil removal must be inspected and replaced timely.
Area: Oxygen Analyzer Sampling Line Blockage
Check: Periodic inspection and CLEANING of O2 analyzer sampling pipes (at least twice yearly per updated procedures after carbon deposit incidents) to prevent partial clogging. Verify sampling line integrity, check for carbon deposits from IGG scrubber. Analyzer must trigger alarm at O2 > 8%.
Area: Deck Water Seal Integrity & Heating System
Check: Internal inspection of deck seal: check Venturi non-return valves/orifice plates for corrosion/damage (excessive water carryover to tanks); inspect inlet pipe/housing for corrosion/cracks; check heating coil condition. In cold weather zones, verify deck seal heating system operational. Test seal alarms.
Area: Activated Carbon Pre-Filter Contamination
Check: Check activated carbon tower for oil/moisture/foreign material accumulation (activated carbon prevents contaminants entering PSA unit). Inspect air dryer & filter units functionality. Replace pre-filters according to maintenance schedule if lubricated air is used. Monitor pressure drop across filters.
Area: P/V Valve (Pressure/Vacuum) Weight Mechanism Freeze
Check: Pre-operation inspection (especially cold weather): check P/V valve weight mechanism for freeze-in/sticking to seat. Verify non-return valve function to prevent cargo tank backflow. Test automatic shut-down systems. Confirm valve operability before each voyage commencement.
Area: Pressure Vessel Integrity & Adsorption Towers
Check: Annual inspection of dual adsorption towers (filled with CMS) for structural integrity, corrosion, or damage. Verify tower seals/connections integrity. Check product quality downstream (N2 purity/flow); if degraded, towers may need CMS bed replacement. Pressure test vessels per classification society rules.

Generic type inspection/maintenance points for Inert Gas Systems (Mahler AGS, Mega-Swarm 2026-06). Per-model specs not auto-populated.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 5000m3h

Capacity (m³/h)

5000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Technical Specifications

Nitrogen Purity: Up to 99.99 vol.-% (purities 95-99.99% typical for marine cargo inerting)
Capacity Range: 200 to 4,000 Nm³/h
Product Pressure: 6-9 bar(abs) at outlet
Dew Point: Minimum -40°C and below
Residual O2 Content: Down to 100 ppmv (higher purities on demand)
Technology: Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS)

Product Lines

NITROSWING PSA Nitrogen Plants
NITROSWING Modular Design Systems

Common Failures & Inspection Points

Area: Carbon Molecular Sieve (CMS) Degradation
Check: Annual full inspection: Check CMS bed condition, verify no moisture exposure (degrades sieve lifespan 10+ years; oil contamination reduces lifespan significantly); quarterly checks of N2 purity/flow rate and sieve replacement need. Pre-filters for moisture/oil removal must be inspected and replaced timely.
Area: Oxygen Analyzer Sampling Line Blockage
Check: Periodic inspection and CLEANING of O2 analyzer sampling pipes (at least twice yearly per updated procedures after carbon deposit incidents) to prevent partial clogging. Verify sampling line integrity, check for carbon deposits from IGG scrubber. Analyzer must trigger alarm at O2 > 8%.
Area: Deck Water Seal Integrity & Heating System
Check: Internal inspection of deck seal: check Venturi non-return valves/orifice plates for corrosion/damage (excessive water carryover to tanks); inspect inlet pipe/housing for corrosion/cracks; check heating coil condition. In cold weather zones, verify deck seal heating system operational. Test seal alarms.
Area: Activated Carbon Pre-Filter Contamination
Check: Check activated carbon tower for oil/moisture/foreign material accumulation (activated carbon prevents contaminants entering PSA unit). Inspect air dryer & filter units functionality. Replace pre-filters according to maintenance schedule if lubricated air is used. Monitor pressure drop across filters.
Area: P/V Valve (Pressure/Vacuum) Weight Mechanism Freeze
Check: Pre-operation inspection (especially cold weather): check P/V valve weight mechanism for freeze-in/sticking to seat. Verify non-return valve function to prevent cargo tank backflow. Test automatic shut-down systems. Confirm valve operability before each voyage commencement.
Area: Pressure Vessel Integrity & Adsorption Towers
Check: Annual inspection of dual adsorption towers (filled with CMS) for structural integrity, corrosion, or damage. Verify tower seals/connections integrity. Check product quality downstream (N2 purity/flow); if degraded, towers may need CMS bed replacement. Pressure test vessels per classification society rules.

Generic type inspection/maintenance points for Inert Gas Systems (Mahler AGS, Mega-Swarm 2026-06). Per-model specs not auto-populated.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 8000m3h

Capacity (m³/h)

8000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Technical Specifications

Nitrogen Purity: Up to 99.99 vol.-% (purities 95-99.99% typical for marine cargo inerting)
Capacity Range: 200 to 4,000 Nm³/h
Product Pressure: 6-9 bar(abs) at outlet
Dew Point: Minimum -40°C and below
Residual O2 Content: Down to 100 ppmv (higher purities on demand)
Technology: Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS)

Product Lines

NITROSWING PSA Nitrogen Plants
NITROSWING Modular Design Systems

Common Failures & Inspection Points

Area: Carbon Molecular Sieve (CMS) Degradation
Check: Annual full inspection: Check CMS bed condition, verify no moisture exposure (degrades sieve lifespan 10+ years; oil contamination reduces lifespan significantly); quarterly checks of N2 purity/flow rate and sieve replacement need. Pre-filters for moisture/oil removal must be inspected and replaced timely.
Area: Oxygen Analyzer Sampling Line Blockage
Check: Periodic inspection and CLEANING of O2 analyzer sampling pipes (at least twice yearly per updated procedures after carbon deposit incidents) to prevent partial clogging. Verify sampling line integrity, check for carbon deposits from IGG scrubber. Analyzer must trigger alarm at O2 > 8%.
Area: Deck Water Seal Integrity & Heating System
Check: Internal inspection of deck seal: check Venturi non-return valves/orifice plates for corrosion/damage (excessive water carryover to tanks); inspect inlet pipe/housing for corrosion/cracks; check heating coil condition. In cold weather zones, verify deck seal heating system operational. Test seal alarms.
Area: Activated Carbon Pre-Filter Contamination
Check: Check activated carbon tower for oil/moisture/foreign material accumulation (activated carbon prevents contaminants entering PSA unit). Inspect air dryer & filter units functionality. Replace pre-filters according to maintenance schedule if lubricated air is used. Monitor pressure drop across filters.
Area: P/V Valve (Pressure/Vacuum) Weight Mechanism Freeze
Check: Pre-operation inspection (especially cold weather): check P/V valve weight mechanism for freeze-in/sticking to seat. Verify non-return valve function to prevent cargo tank backflow. Test automatic shut-down systems. Confirm valve operability before each voyage commencement.
Area: Pressure Vessel Integrity & Adsorption Towers
Check: Annual inspection of dual adsorption towers (filled with CMS) for structural integrity, corrosion, or damage. Verify tower seals/connections integrity. Check product quality downstream (N2 purity/flow); if degraded, towers may need CMS bed replacement. Pressure test vessels per classification society rules.

Generic type inspection/maintenance points for Inert Gas Systems (Mahler AGS, Mega-Swarm 2026-06). Per-model specs not auto-populated.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 10000m3h

Capacity (m³/h)

10000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Technical Specifications

Nitrogen Purity: Up to 99.99 vol.-% (purities 95-99.99% typical for marine cargo inerting)
Capacity Range: 200 to 4,000 Nm³/h
Product Pressure: 6-9 bar(abs) at outlet
Dew Point: Minimum -40°C and below
Residual O2 Content: Down to 100 ppmv (higher purities on demand)
Technology: Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS)

Product Lines

NITROSWING PSA Nitrogen Plants
NITROSWING Modular Design Systems

Common Failures & Inspection Points

Area: Carbon Molecular Sieve (CMS) Degradation
Check: Annual full inspection: Check CMS bed condition, verify no moisture exposure (degrades sieve lifespan 10+ years; oil contamination reduces lifespan significantly); quarterly checks of N2 purity/flow rate and sieve replacement need. Pre-filters for moisture/oil removal must be inspected and replaced timely.
Area: Oxygen Analyzer Sampling Line Blockage
Check: Periodic inspection and CLEANING of O2 analyzer sampling pipes (at least twice yearly per updated procedures after carbon deposit incidents) to prevent partial clogging. Verify sampling line integrity, check for carbon deposits from IGG scrubber. Analyzer must trigger alarm at O2 > 8%.
Area: Deck Water Seal Integrity & Heating System
Check: Internal inspection of deck seal: check Venturi non-return valves/orifice plates for corrosion/damage (excessive water carryover to tanks); inspect inlet pipe/housing for corrosion/cracks; check heating coil condition. In cold weather zones, verify deck seal heating system operational. Test seal alarms.
Area: Activated Carbon Pre-Filter Contamination
Check: Check activated carbon tower for oil/moisture/foreign material accumulation (activated carbon prevents contaminants entering PSA unit). Inspect air dryer & filter units functionality. Replace pre-filters according to maintenance schedule if lubricated air is used. Monitor pressure drop across filters.
Area: P/V Valve (Pressure/Vacuum) Weight Mechanism Freeze
Check: Pre-operation inspection (especially cold weather): check P/V valve weight mechanism for freeze-in/sticking to seat. Verify non-return valve function to prevent cargo tank backflow. Test automatic shut-down systems. Confirm valve operability before each voyage commencement.
Area: Pressure Vessel Integrity & Adsorption Towers
Check: Annual inspection of dual adsorption towers (filled with CMS) for structural integrity, corrosion, or damage. Verify tower seals/connections integrity. Check product quality downstream (N2 purity/flow); if degraded, towers may need CMS bed replacement. Pressure test vessels per classification society rules.

Generic type inspection/maintenance points for Inert Gas Systems (Mahler AGS, Mega-Swarm 2026-06). Per-model specs not auto-populated.

Manufacturer Datasheet

Datasheet

IG Scrubber/Dryer 15000m3h

Capacity (m³/h)

15000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Technical Specifications

Nitrogen Purity: Up to 99.99 vol.-% (purities 95-99.99% typical for marine cargo inerting)
Capacity Range: 200 to 4,000 Nm³/h
Product Pressure: 6-9 bar(abs) at outlet
Dew Point: Minimum -40°C and below
Residual O2 Content: Down to 100 ppmv (higher purities on demand)
Technology: Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS)

Product Lines

NITROSWING PSA Nitrogen Plants
NITROSWING Modular Design Systems

Common Failures & Inspection Points

Area: Carbon Molecular Sieve (CMS) Degradation
Check: Annual full inspection: Check CMS bed condition, verify no moisture exposure (degrades sieve lifespan 10+ years; oil contamination reduces lifespan significantly); quarterly checks of N2 purity/flow rate and sieve replacement need. Pre-filters for moisture/oil removal must be inspected and replaced timely.
Area: Oxygen Analyzer Sampling Line Blockage
Check: Periodic inspection and CLEANING of O2 analyzer sampling pipes (at least twice yearly per updated procedures after carbon deposit incidents) to prevent partial clogging. Verify sampling line integrity, check for carbon deposits from IGG scrubber. Analyzer must trigger alarm at O2 > 8%.
Area: Deck Water Seal Integrity & Heating System
Check: Internal inspection of deck seal: check Venturi non-return valves/orifice plates for corrosion/damage (excessive water carryover to tanks); inspect inlet pipe/housing for corrosion/cracks; check heating coil condition. In cold weather zones, verify deck seal heating system operational. Test seal alarms.
Area: Activated Carbon Pre-Filter Contamination
Check: Check activated carbon tower for oil/moisture/foreign material accumulation (activated carbon prevents contaminants entering PSA unit). Inspect air dryer & filter units functionality. Replace pre-filters according to maintenance schedule if lubricated air is used. Monitor pressure drop across filters.
Area: P/V Valve (Pressure/Vacuum) Weight Mechanism Freeze
Check: Pre-operation inspection (especially cold weather): check P/V valve weight mechanism for freeze-in/sticking to seat. Verify non-return valve function to prevent cargo tank backflow. Test automatic shut-down systems. Confirm valve operability before each voyage commencement.
Area: Pressure Vessel Integrity & Adsorption Towers
Check: Annual inspection of dual adsorption towers (filled with CMS) for structural integrity, corrosion, or damage. Verify tower seals/connections integrity. Check product quality downstream (N2 purity/flow); if degraded, towers may need CMS bed replacement. Pressure test vessels per classification society rules.

Generic type inspection/maintenance points for Inert Gas Systems (Mahler AGS, Mega-Swarm 2026-06). Per-model specs not auto-populated.

Manufacturer Datasheet

Datasheet

SAACKE

IG Scrubber/Dryer 2000m3h unverified

Capacity (m³/h)

2000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Common Failures & Inspection Points

Fouling or deposit build-up caused by poor combustion, contaminated fluid or exhaust soot can reduce heat transfer or flow and produce higher temperatures or loss of capacity
Leakage from tubes, gaskets, seals or casing caused by corrosion, thermal cycling or erosion can appear as fluid loss, pressure decay or cross-contamination
Burner, ignition or fuel-control faults where combustion is used can cause flame failure, unstable firing, smoke or shutdown alarms
Fan, pump or actuator faults caused by mechanical wear or electrical problems can reduce circulation, airflow or treatment effectiveness
Sensor, control or safety-interlock faults caused by drift, wiring defects or contamination can trigger nuisance trips or allow unstable operation

Service: Inspect for leakage, corrosion, deposits, refractory or insulation damage where fitted, abnormal temperatures and secure supports. Check burners, pumps, fans, valves, soot-cleaning or treatment components and safety devices relevant to the installed equipment. Refer to manufacturer documentation for exact operating limits, cleaning criteria and pressure or combustion test values.

Spare Parts: Carry maker-recommended gaskets and seals, burner or ignition service parts where applicable, filters, actuator or valve repair items, sensors, fuses and selected pump or fan consumables appropriate to the unit.

Use Cases: Steam production, heating, waste incineration, exhaust heat recovery, emissions control and related engine-room process duties on marine vessels.

Datasheet

IG Scrubber/Dryer 3000m3h unverified

Capacity (m³/h)

3000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Common Failures & Inspection Points

Fouling or deposit build-up caused by poor combustion, contaminated fluid or exhaust soot can reduce heat transfer or flow and produce higher temperatures or loss of capacity
Leakage from tubes, gaskets, seals or casing caused by corrosion, thermal cycling or erosion can appear as fluid loss, pressure decay or cross-contamination
Burner, ignition or fuel-control faults where combustion is used can cause flame failure, unstable firing, smoke or shutdown alarms
Fan, pump or actuator faults caused by mechanical wear or electrical problems can reduce circulation, airflow or treatment effectiveness
Sensor, control or safety-interlock faults caused by drift, wiring defects or contamination can trigger nuisance trips or allow unstable operation

Use Cases: Steam production, heating, waste incineration, exhaust heat recovery, emissions control and related engine-room process duties on marine vessels.

Datasheet

IG Scrubber/Dryer 5000m3h unverified

Capacity (m³/h)

5000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Common Failures & Inspection Points

Fouling or deposit build-up caused by poor combustion, contaminated fluid or exhaust soot can reduce heat transfer or flow and produce higher temperatures or loss of capacity
Leakage from tubes, gaskets, seals or casing caused by corrosion, thermal cycling or erosion can appear as fluid loss, pressure decay or cross-contamination
Burner, ignition or fuel-control faults where combustion is used can cause flame failure, unstable firing, smoke or shutdown alarms
Fan, pump or actuator faults caused by mechanical wear or electrical problems can reduce circulation, airflow or treatment effectiveness
Sensor, control or safety-interlock faults caused by drift, wiring defects or contamination can trigger nuisance trips or allow unstable operation

Use Cases: Steam production, heating, waste incineration, exhaust heat recovery, emissions control and related engine-room process duties on marine vessels.

Datasheet

IG Scrubber/Dryer 8000m3h unverified

Capacity (m³/h)

8000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Common Failures & Inspection Points

Fouling or deposit build-up caused by poor combustion, contaminated fluid or exhaust soot can reduce heat transfer or flow and produce higher temperatures or loss of capacity
Leakage from tubes, gaskets, seals or casing caused by corrosion, thermal cycling or erosion can appear as fluid loss, pressure decay or cross-contamination
Burner, ignition or fuel-control faults where combustion is used can cause flame failure, unstable firing, smoke or shutdown alarms
Fan, pump or actuator faults caused by mechanical wear or electrical problems can reduce circulation, airflow or treatment effectiveness
Sensor, control or safety-interlock faults caused by drift, wiring defects or contamination can trigger nuisance trips or allow unstable operation

Use Cases: Steam production, heating, waste incineration, exhaust heat recovery, emissions control and related engine-room process duties on marine vessels.

Datasheet

IG Scrubber/Dryer 10000m3h unverified

Capacity (m³/h)

10000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Common Failures & Inspection Points

Poor gas quality from membrane degradation, combustion problems, scrubber faults, or air ingress is indicated by high oxygen readings or inability to meet the required condition
Filter, scrubber, dryer, or wash-water restriction from deposits or blocked elements reduces gas quality or flow
Blower, compressor, or fan degradation causes low delivery pressure or reduced gas production
Valve, seal, non-return device, or deck-water-seal faults can cause leakage, unstable pressure, or compromised backflow protection
Analyzer, transmitter, or control-system faults from contamination or calibration drift give implausible readings, nuisance alarms, or failed automatic sequences

Service: Check gas quality measurement, pressure, temperature, filters, scrubber or dryer condition where fitted, blowers or compressors, drains, non-return devices, alarms, trips, and valve operation. Calibration and exact oxygen or pressure criteria must follow vessel procedures and manufacturer documentation.

Spare Parts: Typical spares include approved analyzer sensors or consumables, filters, valve and actuator seals, gaskets, blower or compressor service items, and critical control components recommended for the installed configuration.

Use Cases: Used on tankers, chemical and gas-related vessels, offshore units, and other ships with cargo or process spaces requiring inerting or nitrogen supply.

Datasheet

IG Scrubber/Dryer 15000m3h unverified

Capacity (m³/h)

15000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

Common Failures & Inspection Points

Poor gas quality from membrane degradation, combustion problems, scrubber faults, or air ingress is indicated by high oxygen readings or inability to meet the required condition
Filter, scrubber, dryer, or wash-water restriction from deposits or blocked elements reduces gas quality or flow
Blower, compressor, or fan degradation causes low delivery pressure or reduced gas production
Valve, seal, non-return device, or deck-water-seal faults can cause leakage, unstable pressure, or compromised backflow protection
Analyzer, transmitter, or control-system faults from contamination or calibration drift give implausible readings, nuisance alarms, or failed automatic sequences

Use Cases: Used on tankers, chemical and gas-related vessels, offshore units, and other ships with cargo or process spaces requiring inerting or nitrogen supply.

Datasheet

Wärtsilä

IG Scrubber/Dryer 2000m3h

Capacity (m³/h)

2000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 (at 32°C seawater temperature)
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 & Korrosion
Check: Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Area: Oxygen analyser sample line blockage due to carbon deposits
Check: Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Area: Deck Water Seal Wasserniveau & Funktionsprüfung
Check: Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & Flammschutz
Check: Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & Ventilsitz
Check: 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-Ventile
Check: Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.

Type-universal inspection/service points for Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/inert-gas/wartsila-moss-generators-for-tankers.pdf

Datasheet

IG Scrubber/Dryer 3000m3h

Capacity (m³/h)

3000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 (at 32°C seawater temperature)
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 & Korrosion
Check: Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Area: Oxygen analyser sample line blockage due to carbon deposits
Check: Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Area: Deck Water Seal Wasserniveau & Funktionsprüfung
Check: Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & Flammschutz
Check: Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & Ventilsitz
Check: 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-Ventile
Check: Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.

Type-universal inspection/service points for Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/inert-gas/wartsila-moss-generators-for-tankers.pdf

Datasheet

IG Scrubber/Dryer 5000m3h

Capacity (m³/h)

5000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 (at 32°C seawater temperature)
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 & Korrosion
Check: Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Area: Oxygen analyser sample line blockage due to carbon deposits
Check: Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Area: Deck Water Seal Wasserniveau & Funktionsprüfung
Check: Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & Flammschutz
Check: Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & Ventilsitz
Check: 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-Ventile
Check: Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.

Type-universal inspection/service points for Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/inert-gas/wartsila-moss-generators-for-tankers.pdf

Datasheet

IG Scrubber/Dryer 8000m3h

Capacity (m³/h)

8000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 (at 32°C seawater temperature)
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 & Korrosion
Check: Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Area: Oxygen analyser sample line blockage due to carbon deposits
Check: Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Area: Deck Water Seal Wasserniveau & Funktionsprüfung
Check: Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & Flammschutz
Check: Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & Ventilsitz
Check: 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-Ventile
Check: Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.

Type-universal inspection/service points for Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/inert-gas/wartsila-moss-generators-for-tankers.pdf

Datasheet

IG Scrubber/Dryer 10000m3h

Capacity (m³/h)

10000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 (at 32°C seawater temperature)
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 & Korrosion
Check: Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Area: Oxygen analyser sample line blockage due to carbon deposits
Check: Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Area: Deck Water Seal Wasserniveau & Funktionsprüfung
Check: Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & Flammschutz
Check: Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & Ventilsitz
Check: 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-Ventile
Check: Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.

Type-universal inspection/service points for Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/inert-gas/wartsila-moss-generators-for-tankers.pdf

Datasheet

IG Scrubber/Dryer 15000m3h

Capacity (m³/h)

15000

Oxygen Content (%)

Dew Point (°C)

-25

Inert Gas System

scrubber

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 (at 32°C seawater temperature)
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 & Korrosion
Check: Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Area: Oxygen analyser sample line blockage due to carbon deposits
Check: Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Area: Deck Water Seal Wasserniveau & Funktionsprüfung
Check: Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Area: Pressure/Vacuum Breaker (P/V-Breaker) Druckeinstellung & Flammschutz
Check: Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Area: Rückschlagventil (Non-Return Valve / Check Valve) Freigang & Ventilsitz
Check: 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-Ventile
Check: Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.

Type-universal inspection/service points for Inert Gas Systems (Wärtsilä, Mega-Schwarm 2026-06). Per-model specs not auto-filled.

[08.08.2026] Datenblattlink entfernt (fehler 404): https://www.wartsila.com/docs/default-source/product-files/inert-gas/wartsila-moss-generators-for-tankers.pdf

Datasheet