THE HIDE SERIES – The new generation G-valves
The most common failures due to malfunction of tank vent check valves are related to either water ingress or abnormal pressure in tank.
Water ingress typically occurs when the ship is listing heavily and the valves are completely or partially submerged. If the float is stuck, damaged or missing, the tank will take in water through the vent valve. Such a situation can rapidly become serious, especially if no pump can be activated due to electrical failure or missing machinist on board.
Abnormal tank pressure is a result of blocked or chocked air flow through the vent valve. Both over and underpressure caused by a stuck float can create significant stress levels in tanks or hull structure. In worse case, this could lead to structural breakdown due to suction blocking or overfilling of tank. Correct dimensioning of tank venting is therefore essential to avoid abnormal pressures.
The reliability of the valves is of the highest importance for safety at sea. John Gjerde AS believes in continuous innovation and our mission is to improve the safety of the crew, their vessels and the environment. We have solid in-house competence and can rely on own test facilities to study all safety aspects related to our products.
Patent No.: 10-1642210