APPLICATION NOTE CXS DRY PUMPS REACTOR VACUUM DUTY REACTOR VACUUM DUTY Chemical reactions are widely used in the synthesis of new compounds in the chemical, petrochemical, fragrance and pharmaceutical industries. Many processes require vacuum to avoid high temperatures, remove oxygen and reaction products, or shift the equilibrium in gas phase reactions. The pressure under which reactions are conducted varies between 50 and 10 -1 mbar, but is usually 10-20 mbar. Reactors typically have capacities of 2 m3 or below, requiring vacuum pumping speeds of around 100-200 m3/h. Capacities can be extended, using larger backing pumps or one or more mechanical or vapour booster stages, to many thousands of m3/h. Historically, ‘wet’ vacuum technologies have dominated this sector but attitudes and decision-making processes are changing, largely because of the trend towards tighter environmental regulation. With green issues now at the forefront, vacuum technology must not only enable the process, it must also reduce energy usage, cope with process upsets, maximise uptime, minimise utilities consumption and abate any effluent or process by-products. Dry vacuum pump technology ticks all those boxes. Edwards CXS pumps take the technology to a new level. Ideally suited to even the harshest chemical processes, they deliver optimum performance with lower running costs and minimal environmental impact. In brief, they’re simply reliable. CXS BENEFITS • Simply reliable even in harsh environments, with • • • • excellent liquid and solids handling Easy to install, simple to operate, quiet running, minimum maintenance Consistent repeatable performance, unaffected by seal water temperature No effluent – contaminated water/oil generated by ‘wet’ vacuum systems is eliminated Process integrity – no risk of oil or water in the swept volume • Safety assured – ATEX certified for use in hazardous environments • Explosion-proof, ensuring safe pumping of flammable gases • Pumps corrosive vapours without corroding • Low cost of ownership, with low

APPLICATION NOTE PRESSURE CONTROL WITH A CXS AND PRESSURE TRANSMITTER (PT) CommunicaƟon hardware opƟon: - MCM Micro Tim - Ethernet - Profibus DP - RS232 OpƟonal DCS, Local Control Panel or Computer Any process vessel, e.g., a reactor PT Inlet valve Condenser with receiver Reactants + Product DisƟllaƟon or EvaporaƟon No expensive control valve CXS VACUUM SYSTEM PID 4-20mA 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 Pump...

APPLICATION NOTE SOLVENT FLUSH VESSEL Module 1: Module 2: Module 3: Module 4: Module 5: Module 6: Module 7: Module 8: CXS Pump with Purges, Inlet and Outlet Flame Arresters, Inlet Valve, Inverter, Controller & Safety Interlocks Solvent Flush Package Inlet Valve By-pass Line Inlet KOP with Level Control Inlet Receiver with Auto-drain EH Mechanical Booster Inlet Condenser Exhaust Condenser & Receiver Additional Module Options: SOLVENT DRAIN Exhaust Silencer Particle Filter Pressure Control Valve Other Control Options Local Control Panel Additional Mechanical Boosters Documentation Packages System...

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 flooded air-gap potted, high efficiency motors. Integral drive and control systems further help to lower the cost of ownership. • Quiet running – noise levels typically as low as 64...