Bronze/Stainless Steel/Copper High Speed Marine High Velocity Pressure Vacuum Relief Valve
The Marine High Velocity Pressure Vacuum Relief Valve is carefully polishing and testing before leaving factory to ensure the performance.
When the ventilation system of the cargo oil tank is equipping with a high-speed ventilation valve that meets the requirements,
the displacement of air in the tank can be achieved as long as the pressure inside the tank
reaches the set opening pressure of the high-speed ventilation valve,
The pressure valve will automatically open and discharge above the deck at a speed greater than 30m/s.
But other operating conditions of the cargo oil tank, such as cleaning and degassing, also require ventilation,
When it is necessary to connect the cabin with the atmosphere at any time,
the pressure inside the cabin or there is no pressure and the pressure valve cannot be open (note: the pressure valve cannot be manually open),
When the outlet flow rate is not less than 30m/s, a breathable device that can be manually open is requiring, which is calling a gas drive cover.
According to the relevant requirements in MSC/Circ.677, the air drive cover and equivalent requirements for pressure/vacuum valves
should be able to prevent flames from entering the cargo oil tank.
We can customize it as your request, and deliver cargo to all over the world
Therefore,A high-speed breathable valve equipped with a vent cover,
whether it is a pressure valve or a vacuum valve that malfunctions, simply open the vent cover for breathability.
The gas drive cover mainly consists of a shell, an upper cover, and a fire screen (fire retardant layer), which can be directly installing on the vacuum valve of the high-speed breathable valve. As shown in the figure.
Install the air drive cover on the vacuum valve
