Dry vacuum system

multi-stagecompact

Vacuum systems in the chemical industry have to meet high requirements regarding chemical and wear resistance, safety and plant availability. GEA uses jet pumps and surface condensers made of graphite for its vacuum pumps in all cases wherethe usual corrosion and acid proof materials are not resistant enough. Because of its excellent thermal conductivity and its high resistance to temperature change, graphite is the ideal material for heat exchangers and jet pumps. Gas-tightness is achieved by means of impregnation. Jet pumps made of graphite and operated in vacuum below 3 mbar can be heated to eliminate ice formation. In cooperation with SGL, a major manufacturer of carbon-based products, GEA has developed a new ejector body made of graphite with many advantages to bring the vacuum system on another performance and safety level. The new developed graphite ejector can be adapted to customer required process conditions and optimize steam consumption. As surface condensers, block heat exchangers, shell-and-tube heat exchangers or also plate heat exchangers from graphite of all commercial makes are used which are suitable to condense vapors under vacuum. Multi-stage vacuum systems with block heat exchanger benefitfrom small dimensions, little space requirement and simple assembly on site. Jet vacuum pumps are utilized for suction pressures down to approx. 0.1 mbar. GEA designs these vacuum pumps for a barometric installation and using a gear pump in Hastelloy also for a non-barometric installation. Advantages Compact design Easy to clean Of variable use No moving parts Low maintenance