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Spare Parts
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Deck Seal Spare Parts Suppliers
Deck seals are a key safety barrier on tankers and gas carriers. They sit between the cargo tanks and the inert gas (IG) plant, preventing hydrocarbon vapors from flowing back into the engine room or boiler. A failed seal can lead to dangerous gas migration, IG plant damage, or detention during port state inspection. Keeping the right spare parts onboard is essential for steady operation and class compliance.
RecordsMarine maintains a directory of deck seal spare parts suppliers for tanker operators, gas carrier managers, and IG plant maintenance teams.
Common Deck Seal Types
Most tanker fleets run one of three deck seal designs:
- Wet (semi-flooded) deck seals — the most common type
- Dry deck seals — found on newer high-flow IG plants
- Combined wet/dry seals — used on some LNG and LPG carriers
Each design has its own parts list, water level controls, and inspection cycle. Trusted suppliers of spare parts for deck seal units stock items matched to each model and serial number, which keeps the IG line within class survey tolerance.
Critical Spare Parts to Stock Onboard
Deck seal failures often happen at sea, far from any spare parts depot. Items most often kept in technical stores:
- Float valves and seal water level sensors
- Non-return valves and check valves
- Demister pads
- Pressure and vacuum (P/V) valves
- Drain valves and ball cocks
- Thermometers and pressure gauges
- O-rings, gaskets, and seal kits
- Internal piping and spray nozzles
A small ship-set covering these items can prevent a full IG shutdown during cargo operations. Working with established providers of spare parts for deck seal equipment also makes restocking simpler during routine port calls.
Recommended Brands
Deck seal equipment comes from a small group of OEMs. Common names worth knowing:
- Alfa Laval (Smit Gas)
- Wärtsilä Moss
- Hamworthy / Wärtsilä
- Coldharbour Marine
- Maritime Protection (Survitec)
- Kashiwa
- Sumitomo
Spares matched to the original maker stay traceable during class surveys and protect the OEM warranty. Sourcing from approved parts distributors for deck seal systems gives access to certified components with full paperwork.
What to Check Before Ordering
Practical points to review before placing an order:
- Original maker reference and serial number of the deck seal
- Material certificates for pressure-bearing parts
- Stock visibility for legacy seal models
- Delivery times that fit your trading pattern
- Spare seal kits matched to upcoming dry dock work
- Certificate of conformity with each shipment
Industry Standards
Deck seal spare parts must meet SOLAS Chapter II-2 Regulation 4 on inert gas systems, IMO MSC.1/Circ.1280 guidance, and class society rules from DNV, ABS, Lloyd's Register, and others. ISGOTT also covers operational requirements on tankers. Type-approved components keep the IG plant compliant during oil major vetting and port state inspections.
Frequently Asked Questions
How often should deck seals be inspected?
Daily water level checks during cargo operations, plus full internal inspection during dry dock.
What is the most common deck seal failure?
Loss of water level due to faulty float valves or blocked drains. Demister pad fouling is also frequent.
Can deck seal parts be replaced afloat?
Most internal parts can, with the IG plant shut down and tanks gas-free. Major work usually waits for dry dock.
Are aftermarket parts acceptable?
For minor consumables, often yes. For valves and pressure parts, OEM is the safer choice.
What happens if the deck seal fails during loading?
Cargo operations must stop until the seal is restored, since the IG line is no longer protected.
Find Deck Seal Spare Parts Supplier Near You
Below is a vetted list of suppliers stocking deck seal parts at major tanker and gas carrier ports. Pick from the entries to match your seal model and ordering window.

Year Founded: 2018
VerifiedCATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
(195)
BRAND:
ALFA LAVAL
WARTSILA
Kashiwa Tech Co
Sung Shin Engineering
HYUNDAI HEAVY INDUSTRIES LTD
(3)
CLASS APPROVED:
IACS: ABS, ClassNK, CCS, BV
WAREHOUSES:
China

Year Founded: 2011
VerifiedCATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
(177)
BRAND:
ALFA LAVAL
WARTSILA
Kashiwa Tech Co
Sung Shin Engineering
HYUNDAI HEAVY INDUSTRIES LTD
(3)
CLASS APPROVED:
IACS: DNV
WAREHOUSES:
Singapore
United Arab Emirates
Angola
Austria
Australia (209)

Year Founded: 2004
VerifiedCATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
Alpha Lubrication Systems
Anemometers
(162)
CLASS APPROVED:
IACS: ClassNK, BV

Year Founded: 2025
VerifiedCATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
Alpha Lubrication Systems
Anemometers
(166)
WAREHOUSES:
Hong Kong

Year Founded: 2010
RM verifiedCATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
AIS (Automatic Identification Systems)
Alpha Lubrication Systems
AMS (Alarm Monitoring Systems)
Anemometers
Anti-Heeling Systems
ARPA (Automatic Radar Plotting Aids)
(166)
CLASS APPROVED:
IACS: ABS, RINA, ClassNK, CCS, BV, CRS, PRS, KR, LR, DNV, IRS
Non-IACS: RMRS, HRS, Other

Year Founded: 2025
CATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AMS (Alarm Monitoring Systems)
Accommodation Ladder Davits
Air Compressors
Air Horns
Air Reservoirs
BWTS (Ballast Water Treatment Systems)
Communication Equipment
Electrical Horns
(12)
CLASS APPROVED:
IACS: CCS, DNV
WAREHOUSES:
China
CATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Automation Control Equipment & Control Units
BWTS (Ballast Water Treatment Systems)
BNWAS (Bridge Navigational Watch Alarm Systems)
Boat Engines
Boiler Automation Equipment
Centrifugal Pumps
Communication Equipment
Compass (Gyro & Magnetic)
(91)
WAREHOUSES:
Turkey

Year Founded: 2014
CATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
(173)
BRAND:
ALFA LAVAL
WARTSILA
Kashiwa Tech Co
Sung Shin Engineering
HYUNDAI HEAVY INDUSTRIES LTD
(3)
WAREHOUSES:
Egypt

Year Founded: 1998
CATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
(166)
BRAND:
ALFA LAVAL
WARTSILA
Kashiwa Tech Co
Sung Shin Engineering
HYUNDAI HEAVY INDUSTRIES LTD
(3)
CLASS APPROVED:
IACS: ABS, ClassNK, BV, LR, DNV, IRS
WAREHOUSES:
Bangladesh

Year Founded: 2013
CATEGORIES:
Deck Seal
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
(172)
CLASS APPROVED:
IACS: DNV
WAREHOUSES:
South Korea
