Pressure Vacuum Breaker or usually known as PV Breaker is a safety measure used in the IG line on deck. The major functions of a PV breaker are
1) Abnormal rise of Pressure in Cargo tanks when loaded specified rate of gas outlets
2) Abnormal rise of Pressure in Cargo tanks when cargo is unloaded beyond specified rate of the inert gas blower
3) Abnormal rise or drop of pressure in cargo tanks when the breather valve doesnot operate properly for the fluctuation of the pressure in cargo tanks due to variation in atmospheric and sea water temperatures
breaker.PNG)
Operation
1) When Pressure Rises
When the pressure in the cargo oil tanks rise, the seal liquid rises in the inner pipe. At this time , if the pressure beyond the specific capacity of the breaker, the seal liquid will push out of the pipe to let the pressure inside the be out
When the pressure in the cargo oil tanks fall, the seal liquid rises in the outer pipe. If the pressure beyond the specific capacity of the breaker, the seal liquid is drown into the cargo oil tanks, and atmospheric air will be inhaled in the tank
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ReplyDeleteIs it a close compartment?
ReplyDeletewhy pv breaker fulfil with water
ReplyDeleteDuring pressure drop there is a rise of water in the outer tube. Because the water could enter into the cargo tanks.. What u think about it
ReplyDeleteEngineers who designed it are not that stupid bro. Water will not go inside, is just few litres, the level to which it will rise is calculated.
DeleteHi, just have a question that after filling a water in pv breaker, after few hours water level drops, and didn't find any leakage on deck, want to know y this happened. Regards, pumpman
ReplyDelete