AUS Automatic Unloading System

What is AUS?
AUS is also know as Automatic Unloading System In Tanker.
This System is normally used In crude Oil tanker / Product tankers fitted with COP.
The main purpose of this system is to reduce the stripping time during discharging by efficiently pumping out all the cargo as bulk discharge.
This is system is integrated with COP and Cargo piping system

Components
Cargo Pumps:- Pump out the Cargo from tanks to shore line
Cargo Separator:- Maintain a positive Flow of Cargo at the pump Suction
Separator Level Sensor:- Gives indication when Separator level Drops

Vacuum Pumps:- Suck out any Gas vapours accumulated inside the separator and pump casing.

Pneumatic Controlled Discharge valves:- Open and shut the discharge valve according to the level of separator
Gas Extraction Valves: Allow and restrict access between vaccum pump and separator


How this Work?
When the level of oil in the separator drops certain level , The vacuum pump starts automatically and sucks out all the vapours from the separator , which creates a negative pressure inside the separator and more oil from the pile line will fill inside the separator, so that COP impeller never run dry.
The discharge valve of the COP is will also shut automatically when ever the oil level in the separators drops, so that the oil level in side the separator can be controlled.
When the oil level restores to normal the discharge valve will automatically open back to its sets position.