N-NHV- -Function

The device is installed on cargo oil tanks. Because of the ability of venting speedily, this device can avoid any sparks getting into oil tanks, and can also let the oil tanks refrain from overpressures, which happening when sailing and refilling.

VV- -Function

The device is installed on cargo oil tanks, and can prevent oil tanks from under-pressures which happening while sailing and draining. Additionally, because of the flame screen in this device, this device can avoid any sparks getting into oil tanks. All devices comply with IMO MSC/Circ.677, Circ.1009 and ISO 15364 : 2000