Gas valve unit

The gas valve unit (GVU) controls the gas feed pressure according to the engine load. In addition, the unit ensures safe maintenance on the engine and performs a leakage test of the automatic shut-off valves before the engine starts operating on gas. In case of hazardous events, the unit will automatically inert the gas line with nitrogen. A gas valve unit is installed in the fuel gas system for each engine, to control the engine-specific gas pressure.

    Technical data

    Main Components*

    • Manual shut off valve
    • Gas filter
    • Block and bleed valve arrangement
    • Flowmeter (optional)
    • Pressure control valve
    • Nitrogen inerting valves
    • Ventilation valves

    * Available as enclosed type (GVU-ED™️)and Open Type (GVU-OD™️)
    (Include two pictures uploaded below)

    Applications

    Wärtsilä can deliver the GVU for Wärtsilä 4S engines and 2S WinGD engines for any applicable type of ship

    Technical features

    Wärtsilä Gas Valve Unit enables

    • Efficient space utilisation
    • Minimised amount of interface
    • Unequalled reliability
    • Common Control system with the engines through Wärtsilä UNIC
    Methane number

    Wärtsilä Methane Number Calculator

    We have developed this tool for ship owners and operators to calculate the Methane Number of the fuel gas.
    The calculation result indicates whether or not the given gas quality is suitable for use in Wärtsilä dual-fuel engines.

    Methane CH4
    mol%
    EthaneC2H6
    mol%
    PropaneC3H8
    mol%
    Iso-butane (2-Methylpropane)i-C4H10
    mol%
    N-butanen-C4H10
    mol%
    Iso-pentane (2-Methylbutane)i-C5H12
    mol%
    N-pentanen-C5H12
    mol%
    EthyleneC2H4
    mol%
    PropyleneC3H6
    mol%
    Neo-pentane (2,2-Dimethylpropane) neo-C5H12
    mol%
    Mix-hexaneMix C6H14
    mol%
    Mix-heptaneMix C7H16
    mol%
    N-Octanen-C8H18
    mol%
    Carbondioxide C02
    mol%
    CarbonmonoxideC0
    mol%
    HydrogenH2
    mol%
    Nitrogen N2
    mol%
    Hydrogen sulfideH2S
    mol%
    Total mol%
    Wärtsilä Methane number (WMN)
    Propane Knock Index (PKI)
    The calculation tool is owned by Wärtsilä and is made for customer use and is for guidance only. Changes in the tool is reserved at any time.
    Dimensions
    GVU-OD Dimensions
    GVU-ED Dimensions
    Business White Paper - Hybrid propulsion is part of the future for RoPax ferries

    Business White Paper: Hybrid propulsion is part of the future for RoPax ferries

    Green is undoubtedly the colour concept most dominating today’s shipping industry, and nowhere is this more true than in the ferry sector. Environmental considerations are, along with the need to optimize operational efficiency, high on the agenda of ferry operators around the world.

    Hybrid systems are being featured more and more on a variety of vessel types, but are particularly relevant to ferries since they are more likely to be operating within areas covered by strict environmental regulations.

    Download this white paper to get a better understanding of how to select the most appropriate power system configuration for your RoPax or RoRo ferry, not only for today, but for tomorrow as well.

    Video - Wärtsilä new and compact LNGPac

    References

    • Harvey Gulf
      Wärtsilä powered Harvey Gulf OSVs awarded Workboat of the Year 2015 title. Wärtsilä has supplied a fully integrated LNG system for six LNG offshore vessels owned by Louisiana-based Harvey Gulf.

      Harvey Gulf

    • JS INEOS Insight
      "The delivery of the first in this series of the Dragon class vessels marks the beginning of a new era in the transportation of liquefied gases. The highly advanced technological solutions that Wärtsilä provides makes these ships the most modern and environmentally sustainable gas carriers ever built,"
      Steffen Jacobsen, CEO, Evergas.

      JS INEOS Insight

    • Bit Viking
      In 2011, the first ever marine conversion of Wärtsilä 46 engines to Wärtsilä 50DF dual-fuel engines was carried out on the product tanker Bit Viking, owned by Tarbit Shipping of Sweden. It also represented the first Wärtsilä 50DF dual-fuel marine installation with mechanical propulsion.

      Bit Viking

    • Viking Grace
      A new era in ferry operations was established in 2013 with the launch of the world’s largest Ro-Pax ferry operating on LNG fuel.

      This vessel features four Wärtsilä 50DF dual-fuel engines and a complete Wärtsilä LNGPac system that includes the storage tanks, the fuel supply system, and all equipment needed for bunkering and related safety and automation systems.

      Viking Grace

    Articles

    The Wärtsilä Gas Valve Unit Enclosed Design (GVU-ED™) for marine applications

    Wärtsilä’s dual-fuel engine technology is...
    17 May 2013
    • In Detail article

    Press releases

     

    Contact us

    Please fill in the form if you have an enquiry. Fields indicated with an asterisk (*) are required. We aim to respond within 1-2 business days depending on the scope of your enquiry.

    For an existing installation, please provide the necessary details to identify the installation and the equipment.

    Find your local Wärtsilä office here

    Find your nearest Customer Support Centre here

    © 2020 Wärtsilä