Manual operations are carried out to connect the process lines to the cylinder; safety devices are provided, as flame detectors connected to interlocks that shut the discharge in case of leaks. The connection of nitrogen and TEAL transfer lines to the cylinder is the only operation manually accomplished inside the concrete walls building. All other valves installed on the pressurization nitrogen, blanketing and TEAL transfer lines are pneumatically controlled from a local control panel safely mounted outdoors. TEAL is transferred by nitrogen pressure from the TEAL cylinder to the metering drum D110. The metering drum hold-up allows the plant running under full capacity for some days.