Vacuum Catalogue - Edwards

Chemical Dry Pumps9Page378IntroductionEdwards is a market leader in dry pump technology and pioneer ofdry vacuum for the chemical process, pharmaceutical and finechemical industries. The CDX uses the very latest in screw pumpingtechnology, whilst the EDP range utilizes the reverse clawmechanism, proven over more than 20 years and in over 100,000installations worldwide, to provide a clean and robust vacuumsolution.Why Dry?Dry running pumps have no oil, steam or water in the process volume.This eliminates, at source, the pollution traditionally associated withwet sealed vacuum systems and provides cost and materialshandling benefits as the sealing medium does not have to bereplenished:• no contamination of the process stream• no polluted effluent• no messy oil drums• improved processing with reduced down time• lower utility and consumable costsThe proven and rugged non contacting designs, both screw andreverse claw mechanisms, include the ability to control pump bodyand internal gas temperatures allowing a comprehensive range ofsolvents, flammables and corrosives to be pumped. Systemizedvariants address the EU's explosive atmospheres (ATEX) directivefor Category (Zone 0) T4 operation. The mechanisms are both highlytolerant to liquids and particles in the gas stream and are suitable formany applications, including:• Distillation• Drying• Evaporation and crystalisation• Filter/dryers• Solvent recovery• Reactor service• House/central vacuumThe product range is available from 83 m 3 h -1 / 49 ft 3 min -1 to900 m 3 h -1 530 ft 3 min -1 with capacity expandable to 30000 m 3 h -1 /17660 ft 3 min -1 and an ultimate pressure of better than 10 -2 mbar /0.015 Torr using combinations of mechanical vacuum boosters.Applications Engineering is a core competence and Edwards are ableto offer a comprehensive solutions package that includes:• Process design• Equipment specification and selection• Safety and operating procedures• Vacuum system and control integration• Commissioning adviceEdwards have a full range of dry pumps with a set of characteristicssuited to most applications.CXS Dry PumpsSimple to Install and UseIntegral controller and safety systems for ‘Plug and Pump’, flexibleoperation.High ReliabilityCutting edge screw technology for corrosion-free operation androbust liquid and solids handling.Low Cost of OwnershipBest in class installation and running costs with up to 5 years betweenservice.Environmentally FriendlySmooth, quiet running,