High Velocity Pressure Vacuum Valve
General Description
- IMO MSC/Circ. 677/1009
- ISO 15364
- STRONG STABILITY
- NON-HAMMERING
- NON-OSCILLATING
- N.D 65mm ~ 300mm
- JIS, ANSI, DIN etc FLANGE
- WEIGHT LOADED TYPE
Se-Won High velocity pressure vacuum valve provides automatic control of pressure differentials during cargo loading/unloading, ballasting, or thermal variations and gas freeing purpose on tanks. Se-Won valve is designed to prevent the passage of flame into cargo tanks only if vent outlets on ships fitted with inert gas systems.
Operation
Before loading or unloading, the High velocity pressure/vacuum valve must be test lifted to assure the movable pressure, vacuum disc. The check lift is designed to be self-closing.
Loading
When loading, the pressure unit of the Se-Won High velocity pressure/ vacuum valve is in operation, Consequently, it must be check lifted by turning the check lift handle from its vertical position to the upper position and automatically back again, before the loading is commenced.
Unloading
When unloading, the vacuum unit may enter operation. Consequently, it must be check lifted by pushing the vacuum check lift under the vacuum unit and automatically back again to the initial position. |