Application: The high-velocity relief valve (pressure/vacuum valve for cargo oil tank) generally uses by the relief system of the oil tanker and chemical tanker, according to the current regulations;IMO and IBC. the relief system used for oil tanker and chemical tanker is more important for the safety of the ship. It's not only for ensuring the safely of the cargo oil tank, avoid over-pressure or low-pressure; but also for controlling the fire, The dangerous of explosion and the releasing of the noxious gas.
Operational principle: The experiment proves the valve will open while the pressure of the system reaches to the set pressure; the valve stem is lifted or dropped while the pressure rising or falling. The stem will never full lifted and cracked while it under the maximum working pressure (less than 25kPa).