Vacuum packing consists of removing the air from a package to protect and preserve its contents: food, household and industrial products, etc. Particularly effective for food preservation, Vacuum technology is now also used in the restaurant industry for certain types of cooking. With flexible packaging shapes, it allows the volume of the contents and packaging to be reduced.
Vacuum evaporation is a thin-film (usually metallic) deposition technique used in microelectronics manufacturing. The material to be deposited is evaporated in a Vacuum in a hermetically sealed enclosure, the Vacuum allowing the particles to reach the substrate directly where they recondense in a solid state.
Distillation is commonly used to separate the components of a liquid mixture. As the liquid components have different boiling points, they evaporate under different operating conditions. And can be removed and recovered successively.
The manufacture of a semiconductor device is a complex process, involving many steps in a Vacuum. The deposition process is part of it and consists in depositing a material on the wafer thanks to several technologies: PVD (Physical Vapour Deposition), PECVD (Plasma Enhanced Chemical Vapour Deposition), etc. Each technology requires a different level of Vacuum. We supply advanced and customised Vacuum systems generally consisting of two-stage rotary vane pumps, piston pumps and boosters.
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Semiconductors
Electronics
Chemicals
Pharmacy
Materials
Automotive
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Vacuum application and maintaining Vacuum in condensers
Vacuum application and maintaining Vacuum in condensers
Operating principle and use
The function of the Vacuum is, in the first instance, to produce the initial Vacuum in the condenser to a predefined level before the turbine is started within a defined maximum time and, in the second instance, to extract the non-condensable gases, thus maintaining the desired Vacuum in the condenser. Since high suction capacities are often required and non-condensable gases are saturated with water vapour, liquid ring pumps are the main technology used for this application. Systems designed and manufactured by GEFI are in operation on all continents around the world.
Vacuum impregnation is a process that uses Vacuum to remove as much air as possible from a structure and then replaces it with a resin (or other impregnating solution) that will fill all the cavities. The resin is used in particular to provide electrical insulation between the conductor coils. Vacuum insulation equipment is also used in the materials industry to improve the performance of materials or enhance their aesthetic characteristics.
MAIN MARKETS
Insulation of wood, electrical products, such as high voltage motors, generators, class H dry-type transformers, power capacitors, cable insulation, motor repair, etc.
In order to improve the quality of the final product, gases, vapours and moisture are extracted from the processed material under Vacuum.
One example is the degassing of plastics during the extrusion process: moisture in the form of vapour and gases caused during the melting process are extracted directly from the screw area of the extruder, which considerably improves the structure and physical properties of the product.
MAIN MARKETS
Plastics
Brick factories
Tile factories
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