APPLICATION NOTE CXS INTRODUCTION Chemical processes present special challenges when it comes to vacuum. Equipment often has to operate in damp, dusty, corrosive, flammable or explosive environments. Whatever your process requirements, Edwards can provide an innovative and economic solution that is safe, flexible and reliable. Building on our long experience of vacuum applications, CXS range provides all the advantages of dry pumps while setting new standards for reliability, performance, control and economy. CXS chemical dry pumps are ideally suited to even the harshest chemical and pharmaceutical processes and provide optimum performance in a wide range of applications, including distillation, drying, evaporation, reactor service, house vacuum, solvent recovery, sterilisation, fatty acid deodorisation and filtration. CXS BENEFITS • Low cost of ownership » With low energy usage and utility costs » No routine service and major service intervals of up to five years • Simply reliable » Even in harsh environments » Excellent liquid and solids handling • Environmentally friendly » No contamination of the process stream or cooling water » No effluent generation • Safety assured » ATEX certified for use in hazardous environments » Pumps corrosive vapours without corroding » Explosion-proof to ensure safe pumping of flammable gases • Flexible » Can be combined with booster pumps to provide deep and flexible vacuum down to 10 -3 mbar • Outstanding support from a global company » Famed for its best-in-class technology and ap

APPLICATION NOTE PERFORMANCE CURVES Torr, (mm Hg) 10-3 Pressure, mbar Mechanical Booster Rotary Piston Pump Rotary Vane Pump Liquid Ring Pump Steam Ejector Distillation, normal Short path distillation Molecular distillation Reactor service Central vacuum (flammables & corrosives) Fatty acid deodorisation, Biofuels Drying, evaporation, crystallisation, concentration Gas recovery/recirculation Degassing Absorption, Adsorption, Desorption Pervaporation Solvent recovery Isocyanates production Impregnation Polymers and plastics production Paints, pigments, coatings and ink production Soaps/detergents...

Volt free circuit CLOSED when pump running µTIM PUMP READY Volt free circuit CLOSED when system at temperature and no warning present µTIM PUMP ALARM Volt free circuit CLOSED when no alarm condiƟons exit µTIM PUMP ON PROCESS Volt free circuit CLOSED when pump on process Pump runs when either internally OR externally supllied 24V contact closed NITROGEN INLET µTIM PUMP START/SHUTDOWN µTIM PUMP ON/OFF PROCESS SOLVENT FLUSH VESSEL SOLVENT FLUSH VESSEL SOLVENT DRAIN COOLING WATER INLET MECHANICAL BOOSTER • Exhaust Silencer FROM 8 • Dust Filter TO 7 MECHANICAL BOOSTER • Pressure Control Valve • Other...

APPLICATION NOTE CXS FEATURES • CXS chemical dry pumps feature cutting-edge tapered screw technology. Smooth, gradual compression along the length of the rotor results in improved thermal control and optimised performance at all inlet pressures. • An advanced temperature management system maintains the pump temperature at programmable levels for optimal, repeatable process performance. • The innovative design uses high efficiency air-gap potted • Integral drive and control systems further help to lower the • The pump mechanisms are smooth and quiet running, with • They can pump up to one litre...