Pressure Vacuum Valves for Cargo Tanks GB/T19699-2005

The High Velocity PV Valve for cargo ships is also called as high velocity relief valve or pressure/vacuum valve. It is a controlled venting system necessary for oil tanker and chemical tanker.
The series of DF-ISO high velocity relief valve which are produced by our company is a new generation production that is without vibration and anti-collision. It is the safest production for oil tanker and chemical tanker once operated by the Manual.

Standards & Regulations:

The DF-ISO type High Velocity PV Valve (high velocity relief valve) is designed, manufactured and tested by the following standards and stipulations:
1 .IMO.MSC/Circ.677 Revised Standards of Designing, Testing and Installing the Device that can Stop the Flame into the Liquid Cargo Tank;
2 .IS015364 Ships and Marine Technology-Pressure/Vacuum Valve for Cargo Tank;
3. IMO.MSC/Circ1324;
4. EN12874-2001 Requirements, Testing Methods and Usage Scope about the Flame Arrester.

Usage:

As the sole breathable port of oil tanker and chemical tanker, the pressure vacuum valve is installed on the top of each compartment. When the hydraulic compartment is loading cargo. the pressure valve effluent mixed gas at a speed of more than 30 m/s vertically upwards. When discharge cargo, the vacuum valve add air to the cabin automatically to prevent the hydraulic tank from over pressure and pressure loss. Pressure vacuum valve made in accordance with the above standards can prevent the flame into the hydraulic tank even under the working condition.

Tests:

The cargo-oil-tank-pressure/vacuum-valve test of our company is examined in the laboratory which is approved by the national competent authority, and we passed all the tests of following items in accordance with the above standard, obtained the approval of china classification society(CCS) and some foreign classification societies.
I.Fire Resistant Test.
2. Re-burning Test.
3. Frozen Test.
4. Corrosion Resistant Test.
5. Flowing Test.

Technical Data