Complete series of accessories for a workmanlike realization of ULO and DCA conservation

Gas-tight panels

The ideal solution for the construction of gas-tight conservation rooms and modern automated warehouses are sandwich panels in painted galvanized steel with an inside insulation in polyurethane foam. Panels can be connected to each other with dry or foamed seals, the latter solution being deemed optimal to guarantee a perfect tightness of room along time. Marvil is in a position to propose the best technical solution according to the use and features of each individual room construction.

Gas-tight doors and windows

Doors and windows play an essential role for the fair functioning of gas-tight rooms. Doors used are insulated with injected polyurethane and their surfaces are made in painted galvanized sheet plates, double-glass windows with thermal edges are provided with closed-cell soft seals. Also in this regard Marvil is in a position to propose the best technical solution according to the use and features of each individual cell construction.


To control the correct functioning of plants during the season and to measure the level of gas-tightness of rooms during the specific “gas-tightness test”, water-column pressure gauges are to be used, for the reading of the pressure differential between controlled-atmosphere rooms and the outside environment. They are provided with millimeter scales and manual “zero” adjustment.


To measure the relative humidity inside the cells, psychrometers made up by a double thermometer are to be used. Their scale goes from -20°C to +20°C. They are equipped with a water tank to guarantee a long-lasting permanence in cells in controlled atmosphere.


To compensate the variations of pressure in controlled-atmosphere cells in relation to variations of temperature, flexible bags in reinforced plastic material are to be used. Their sizes are calculated to fit room volumes. Such bags change their shapes and volumes, thus compensating the pressure of rooms and preventing movements of walls and ceilings that could otherwise be damaged and lose their gas-tightness.


Our valves in PVC are made expressly to compensate positive or negative variations of pressure, as may occur during the normal working of the controlled-atmosphere plant, mainly depending on the variations of temperature.


Mounted outside of controlled-atmosphere rooms, they are used to measure the pressure differential between the inside and outside of rooms. They are provided with a digital visual display.


Designed to obtain a high hydrometric degree, the humidification system Marvil AW-2 proved to represent the best and most effective method of humidification of cold-storage rooms. It combines heavy-duty capacity and a fine nebulization range, obtained by compressed air.

Electronic Ethanol analyzer for controls during operations ILOS-PLUS (DCA) complete with an apple-crusher

The ILOS-PLUS conservation technique foresees periodical checks of the product, carried out by analyzing the juice of a sample series of apples, by measuring the ethyl-alcohol (ethanol) content diluted in fruits (providing for the required protection of apples from warming).

The electronic Marvil analyzer comes in an elegant small suitcase containing laboratory accessories (test-tubes, syringes, samplers, etc.) and analysis kits (electronic sensors, enzyme capsules and standard calibration sample bottles) required for the first year of conservation in three cells.

The device is complete with its usage and calibration software and provided with a user’s manual.


An instrument for oxygen analysis with a zirconium-oxide room, designed as a safety detector, to be mounted on the exhaust pipe of the carbon-dioxide absorber of the COM series, to check the oxygen value in the rooms served by the machine. If the oxygen content in a room is lower than the threshold set, the device releases an alarm signal and sends it to the computerized control unit of the system.