In modern shipbuilding, LNG propulsion technology is gaining ground due to stricter regulations regarding emissions of nitrogen oxides and sulphur dioxide. Therefore, this new technology is becoming increasingly important for both freighters, tankers as well as for passenger ships

Due to the low emissions of LNG this fuel is much cleaner than diesel oil and even more than heavy fuel oil. The natural gas is stored in liquid form in special ship tanks and will be transformed back into gas in complex reliquefaction plants before supplying the combustion chambers of the ship’s engine, or the gas turbine. Quadax butterfly valves are certified to DNV-GL and applied in LNG propulsion technology both in the low and high pressure range and contribute to a reliable control of the fuel supply.

Due to the low emissions of LNG this fuel is much cleaner than diesel oil and even more than heavy fuel oil. The natural gas is stored in liquid form in special ship tanks and will be transformed back into gas in complex reliquefaction plants before supplying the combustion chambers of the ship’s engine, or the gas turbine. Quadax butterfly valves are certified to DNV-GL and applied in LNG propulsion technology both in the low and high pressure range and contribute to a reliable control of the fuel supply.

These include the ship’s bunker systems, tank, cold box (gas processing) and the Fuel Gas Supply System (FGSS) to the engine or gas turbine. Full tightness with temperatures from -196°C to +100°C are required. In addition, gearboxes and actuators are specially coated for seawater applications with corrosion protection class C5-M.

Shipbuilding
Fuel supply systems

Suitable products

QUADAX® short pattern buttweld

QUADAX® Top Entry buttweld

QUADAX® flange

 

QUADAX® lug

QUADAX® gate valve replacement

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