The pool of Sea Marconi systems has been enriched by two elements, two mobile units for the physical treatment of oil. The new systems have been designed and developed to be lightweight (the estimated empty weight is 590 kg), with reduced bulk (L 1,560 x l 1,000 x h 1,440 (mm), and easy to handle. This means they can also be transported on road trailers without the need to unload, and allows them to be transported to areas with very tight access points (on off-shore platforms, caves, bunkers, underground power stations, etc.).

Given their structural features, one of these MDUs was recently selected and transported by helicopter to the peaks of the Adamello (Lombardy) to perform a physical treatment on a transformer (following maintenance with emptying and subsequent refilling). Given the more than one metre of snow and in view of the difficult logistics related to the slope and altitude of the access road to the operations site, a helicopter was the only way to reach the transformer. Thanks to its reduced weight and smaller dimensions, the Sea Marconi decontamination unit was hooked to the helicopter with a chain using anchoring rings and transported to the electrical power station ( link to the video of the operation ).

Specifically, the two devices allow the suction and pumping of oil (emptying and refilling), the heating of the oil to a preset temperature, the filtering of solid suspended particles and vacuum degassing and dehydration. These functions can also be performed simultaneously through the continuous circulation of oil, in a closed circuit between the system and the transformer.
The control and safety systems installed allow the system to be used without the need for operator guidance.

The system is designed to operate with the following performance levels:
- Nominal flow: 160 to 600 l/h
- Maximum heating temperature: 80 °C
- Oil temperature in degassing chamber: 60 to 70 °C
- Heating capacity Δt = 40 °C at 600 l/h
- Maximum pressure: 6 bar
- Absolute pressure in degassing chamber: < 1 mbar a regime
- Filtration 2 micron

Structural specifications
The system is mounted on a AISI 304 stainless steel frame, equipped with fork guides for movement with a forklift, anchoring rings for crane lifting, wheels and corner blocks for anchorage on a road trailer.
All elements of the hydraulic circuit, including the connection points of the flexible input and output hoses, are contained in a watertight tank to collect eventual accidental oil spills.
The hydraulic circuit, the degassing chamber, the filter bodies and the heater are made of AISI 304 stainless steel.