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Deck Seal Suppliers

Inert gas (IG) systems on tankers use a deck seal to stop flammable vapors from flowing back toward the IG plant during cargo handling. The unit acts as a one-way liquid barrier between the cargo side and the gas generation side. SOLAS requires it on any vessel carrying oil, chemicals, or liquefied gas above set tonnage limits.

RecordsMarine maintains a directory of deck seal suppliers for newbuild project teams, conversion yards, and superintendents sourcing units to fit their IG plant.

Designs Available on the Market

Tanker fleets use three main configurations:

  • Semi-flooded (wet) units — kept full of water, low maintenance
  • Dry rotating-disc units — used where pressure loss must stay low
  • Hybrid wet/dry assemblies — fitted on some gas carrier projects

Older crude and product tankers run wet versions, since they handle rough seas and dirty water without issue. Higher-capacity IG plants on modern tankers tend to use dry models for better energy efficiency. Approved suppliers of deck seal units provide sizing data so the design can be matched to cargo flow, stripping capacity, and pump rates before placing the order.

Vessels That Need Them

SOLAS requires a deck seal on:

  • Crude oil and product tankers
  • Chemical and parcel tankers
  • LNG, LPG, and ethylene carriers
  • FPSOs and FSOs
  • Shuttle tankers and bunker barges above regulatory cutoffs

Smaller workboats and bunkering craft below SOLAS thresholds may use a simpler water lock or check valve. Once flammable cargo limits are crossed, a full deck seal is mandatory. Sourcing from recognized providers of deck seal equipment keeps the installation paperwork acceptable to class surveyors from the first inspection.

Names That Lead the Category

A small group of original makers dominates global supply:

  • Alfa Laval (Smit Gas)
  • Wärtsilä Moss
  • Hamworthy (now part of Wärtsilä)
  • Coldharbour Marine
  • Survitec (Maritime Protection division)
  • Kashiwa
  • Sumitomo Precision Products

These brands cover both newbuild scope and dry dock retrofits. Approved distributors of deck seal equipment also carry the matched accessories — float kits, demister cartridges, drain valves, P/V valve seats — needed during scheduled overhauls.

Points Worth Clarifying at Quote Stage

A short checklist that helps avoid commissioning issues:

  • Required IG flow rate (m³/h) and operating pressure
  • Seal type — wet, dry, or combined
  • Materials suited to your cargo grades
  • Type-approval certificate valid for the vessel's flag
  • Delivery slot that fits the yard schedule
  • Drawings, factory test data, and installation manuals
  • Whether the supplier sends a commissioning engineer

Confirming these in writing prevents disputes later.

Regulatory Framework

Deck seal approval and operation follow SOLAS Chapter II-2 Regulation 4, IMO MSC.1/Circ.1280, ISGOTT recommendations for tanker operations, and IACS class rules. A factory-tested seal ships with a document folder containing material traceability, pressure test reports, and approval letters that surveyors review during gas trials.

Frequently Asked Questions

What service life can be expected?

Most maintained units stay in service for 20 to 25 years before a major rebuild.

Is converting from wet to dry feasible?

Yes. The change needs new piping and class re-approval, usually done during a scheduled docking.

How fast can a new unit be supplied?

Catalog sizes ship in 4 to 8 weeks. Engineered-to-order units for large IG plants can take 16 to 20 weeks.

Does the price include start-up assistance?

Some OEMs include it. Others quote it separately or leave it to a yard subcontractor.

What testing happens before shipment?

Each seal goes through hydrostatic and leak testing at the works, with certificates included.

Find Deck Seal Supplier Near You

The list below covers deck seal makers and authorized agents working with shipyards and tanker fleets in major maritime regions. Compare the listings, request quotations directly, and pick a partner that fits your IG project.

  • premium

    Asia Pacific Ship Supply Limited logo

    Year Founded: 2011

    RM verified

    Asia Pacific Ship Supply Limited

    RM verified

    APS SPARE PARTS SUPPLER SHIP SPARE PARTS SUPPLIER YANMAREY18/EY22/N18/N21 PISTON RINGS NOZZLE IN STOCK BW S42MC S50MC-C 60MC-C PISTON RINGS NOZZLE IN STOCK BW S35/42/50/60MC/MC-C PISTON RINGS NOZZLE IN STOCK S50/60MC/ME-C PISTON RINGS NOZZLE IN STOCK

    asia-shipsupply.com
    sales@asia-shipsupply.com

    CATEGORIES:

    • Deck Seal

    • 15 PPM Monitoring Equipment

    • Air Compressors

    • Air Driven Motors

    • Air Horns

      (13)

    BRAND:

    • WARTSILA

    CLASS APPROVED:

    IACS: CCS

    WAREHOUSES:

    • China

  • ARK MARINE SERVICE INC. logo

    Year Founded: 2004

    Verified
    Verified

    We specialize in providing original equipment supplies, primarily for main and auxiliary engine spares. As a factory-based company, we ensure the best pricing without compromising on quality. Our dedicated logistics team handles all deliveries efficiently, offering competitive rates for air, sea, and courier services.

    CATEGORIES:

    • Deck Seal

    • Air Compressors

    • Engines (2-Stroke)

    • Engines (4-Stroke)

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

    • AUS (Automatic Unloading Systems)

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      (150)

    CLASS APPROVED:

    IACS: ClassNK, BV

  • MYTHMAR MARINE DANISMANLIK TIC. LTD. STI logo

    Year Founded: 2018

    RM verified
    RM verified

    MYTHMAR MARINE as a spare parts broker has the knowledge and power to serve you well by providing all types of spare parts genuine, under license or O.E.M. in cooperation with our affiliated companies at competitive prices. We can provide you with new spare parts from Europe Poland, U.K., Denmark, Germany, etc., Japan, Korea, China, as well as used spare parts from India and Singapore, with warehouses in Greece, India, Bangladesh and China for second hand spares. We can negotiate prices and payment terms and delivery as manufacturers rely on our purchase and in our orders.

    CATEGORIES:

    • Deck Seal

    • 15 PPM Monitoring Equipment

    • Accommodation Ladder Davits

    • Accommodation Ladders & Gangways

    • Air Compressors

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    • Air Horns

    • Air Reservoirs

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    • AIS (Automatic Identification Systems)

    • Alpha Lubrication Systems

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    • Anemometers

    • Anti-Heeling Systems

    • ARPA (Automatic Radar Plotting Aids)

    • AUS (Automatic Unloading Systems)

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    • Autopilot

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  • ISLAND MARINE INTERNATIONAL logo

    Year Founded: 2009

    Island Marine International is a supplier for marine spare parts. We are expertise in Bridge to engine room spares parts. From the day of establishment, we try to increase our business range, range of spare parts and our client services. It is our supreme priority to build and sustain strong long-term relationship with our clients by providing solutions, on top of supplying spare parts. As a part of the supply chain, we understand the requirements of value for money, which is why we promise competitive prices for the highest quality spare parts and at the fastest delivery time. We are able to offer relatively lower prices and at a quicker delivery time as compared to our competitors. Having accumulated years of experience in this trade, our company has acquired an outstanding reputation for trustworthiness and reliability. This is the result of the zeal of our professional staff and skilled technicians in fulfilling the needs of our customers.

    CATEGORIES:

    • Deck Seal

    • 15 PPM Monitoring Equipment

    • AIS (Automatic Identification Systems)

    • AMS (Alarm Monitoring Systems)

    • ARPA (Automatic Radar Plotting Aids)

    • AUS (Automatic Unloading Systems)

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    • Accommodation Ladders & Gangways

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      (160)

    WAREHOUSES:

    • Bangladesh

  • BestBangla Marine and Trading Ltd logo

    Year Founded: 2024

    At BestBangla Marine Trading Ltd., we specialize in the supply, sourcing, and export of high-quality marine equipment tailored to meet the operational demands of vessels worldwide. From engine room machinery to navigation systems, deck tools to electrical componentswe deliver trusted equipment from leading global manufacturers. Our offerings include: Main Aux Engine Components Pumps, Compressors Purifiers Navigation Communication Systems Electrical, Hydraulic Pneumatic Equipment Deck, Safety Galley Equipment All equipment is inspected, tested, and verified for performance and reliability. Whether new, OEM, or reconditioned, we ensure your vessel is equipped to operate efficiently, safely, and without delay.

    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

    • Accommodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

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    • Air Reservoirs

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    • Alpha Lubrication Systems

    • Anemometers

      (159)

    WAREHOUSES:

    • Bangladesh

  • Universe Shipping and Trade Links logo

    Year Founded: 1995

    We deal in supplies of marine engine parts, marine Equipments, Marine air compressors, HVAC compressor spare parts, Pumps, Turbochargers, Hydraulic motors and pumps, Freshwater Gensets, Purifiers, Governors, Navigation and Safety Equipments, Lashing Materials and Marine Ropes, Bridge Equipments, Ships Horns, Ships Stores, Anchor and Anchor chains, Mechanical Seals, Valves etc., We can supply air compressor complete and spare parts for following: - Air Compressors Hatlapa, Hamworthy, Tanabe, Sperre, JP Sauer Sohn.etc.. - Refrigeration Compressors like, Daikin, Carrier, Carlyle, Grasso, Sabroe, Bock, Bitzer, York.. - Spare parts and equipment for diesel engines, purifiers, compressors, pumps, turbochargers and filters - Pump Mechanical Seals, Maintenances Chemicals, Tank Cleaning Chemicals, Water based Eco Chemicals, Cooling Water Treatment, Boiler Water Treatment, Evaporator Treatment, Fuel Oil Treatment, Ships Stores, Deck Item, Test Kits etc.,

    CATEGORIES:

    • Deck Seal

    • 15 PPM Monitoring Equipment

    • Accommodation Ladders & Gangways

    • Air Compressors

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    • Air Horns

    • Air Starters

    • AMS (Alarm Monitoring Systems)

    • Autopilot

    • BWTS (Ballast Water Treatment Systems)

    • Centrifugal Pumps

    • Compass (Gyro & Magnetic)

    • Diesel Generators

    • Electrical Actuators

    • Electrical Horns

    • Engine Room Ventilation Fans

    • Engines (2-Stroke)

    • Engines (4-Stroke)

    • Engine Starting Systems

    • Exhaust Gas Turbochargers

      (41)

  • Zava Marine Corporation logo

    Year Founded: 2022

    Expert manufacturers of industrial equipment and spare parts, delivering precision-engineered, durable solutions for machinery, automotive, aerospace, and heavy industries. Custom fabrication, OEM/aftermarket parts, and global supply chain support

    CATEGORIES:

    • Deck Seal

    • AMS (Alarm Monitoring Systems)

    • Accommodation Ladders & Gangways

    • Air Compressors

    • Air Driven Motors

    • Air Horns

    • Air Reservoirs

    • Anti-Heeling Systems

    • Automation Control Equipment & Control Units

    • Alpha Lubrication Systems

      (157)

    CLASS APPROVED:

    IACS: ABS, RINA, ClassNK, CCS, BV, CRS, PRS, TL, KR, LR, DNV, IRS

    Non-IACS: RMRS, HRS, INSB Class, Other

    WAREHOUSES:

    • China

  • Default logo

    Year Founded: 2025

    Specializing in the maritime electronics industry and professional fiber optic compass manufacturer Providing professional services and selling all kinds of marine electronic products.We provides one-stop service including technical consultation, system design, equipment sales, installation and commissioning, maintenance. We have implemented the ISO9001 quality management system, which can provide customers with the highest quality service standards. There are a wide variety of products, and the agent cooperates with the worlds major brand-name products. These include: radio communication, satellite communication, internal communication, rescue, navigation, weather, comprehensive, entertainment, fishery, other and engine room automation control and alarm system. The products can be applied to new building ships, refurbished ships, fishing boats, inland river boats and yachts, etc.

    CATEGORIES:

    • Deck Seal

    • 15 PPM Monitoring Equipment

    • Accommodation Ladder Davits

    • Accommodation 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)

      (157)

    CLASS APPROVED:

    IACS: CCS

  • Default logo

    Year Founded: 2010

    Magna Mare offers a comprehensive range of marine equipment, representing leading manufacturers to provide clients with advanced and reliable solutions. Their portfolio includes products such as ballast water treatment systems, scrubber systems, and other essential marine technologies.

    CATEGORIES:

    • Deck Seal

    • AMS (Alarm Monitoring Systems)

    • Automation Control Equipment & Control Units

    • BWTS (Ballast Water Treatment Systems)

    • Centrifugal Pumps

    • Elevators

    • Gear Pumps

    • Inert Gas Systems

    • Oily Water Separators

    • Piston Pumps

    • Plate Type Heat Exchangers

    • Screw Pumps

    • Sewage Treatment Systems

    • Tube Type Heat Exchangers

  • Default logo

    Based in Stockholm, Sweden, M.E. Solutions (widely recognized in the industry by the acronym MESAB) is a specialized maritime engineering and installation company focused on technical retrofits and environmental compliance. Establ

    CATEGORIES:

    • Deck Seal

    • BWTS (Ballast Water Treatment Systems)

    • Inert Gas Systems

    • PV Valves

    • Scrubber Towers (for tankers)

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