The high-velocity relief valve ( pressure/vacuum valve for cargo oil tank ) has already been generally used by the relief system of the oil tanker and chemical tanker, according to the current regulations:IMO and IBC.

IS015364:standards of Ships and Marine Technology Pressure/Vacuum Valve for Cargo Tank and the publication of the IMO.MSC/Circ.1009 Circular provide standards for designing,manufacturing, experimenting and maintaining the high- velocity relief valve.

Recently, Ship Design&Research institutes and ship- owners ask for using the high- velocity relief valve with high quality,because the relief system used for oil tanker and chemical tanker is more important for the Safety of the ship.

It is not only for ensuring the safety of the cargo oil tank and avoiding over-pressure or low- pressure, but also for controlling the fire, the danger of explosion and the releasing of the noxious gas.It also pays more attention on its practicability; provides the safest high-velocity relief valve with a good price.