The Mark IV SuperGreen high velocity tank level valve is the result of dedicated research into creating the ideal compromise between loss of tank vapour and non-oscillating behavior, all in a simple package that appeals to low maintenance.

It features a combination of magnet power and air breaks, which are unique and patent applied for. It is truly non-oscillating as it complies with the two second no-metal-to-metal contact definition from ISO 15364:2007.

At the same time it does not emit tank vapour to atmosphere unless the set-pressure is reached, at which point it will only emit excess pressure, unless a true emergency is happening when the primary full capacity unit will open.

INTERANKO and others have estimated the VOC loss on the crude carrier to equal 0.25% of the cargo. The Mark IV SuperGreen can reduce VOC loss for all practical purposes to nil during voyage.

The vent features two discs: a small weight loaded one for thermal variations during voyage and full flow valve for use during loading and special occasions.

To find out more about the Mark IV SuperGreen and our full range of tank level valves, then please contact us for more information.