Vacuum Catalogue - Edwards

EDP12FROM PROCESSELECTRICALSUPPLYFFROMCONTROL8VPPNEUMATICFGSLINEELECTRICALSUPPLYFCVSOVVPNRVPCVSEAL PURGENITROGENCOOLINGFG7WATEROUTLETFGTSPITOCONTROL3TCV654COOLINGWATERINLETS9Page3801 Inlet 5 Gearbox2 Sealed high vacuum bearings 6 Torque limiter3 Indirect cooling 7 Outlet4 Rugged modular construction 8 Reversed clawThe Reverse Claw MechanismThe EDP range are multistage claw mechanisms. Each stagecomprises of two claw shaped rotors on parallel shafts, which rotatein opposite directions. The claws trap and compress the process gas,which takes a zig-zag path between the stages, as it is moved alongthe axis of the shaft from the inlet at the top to the exhaust at thebottom.ADA Inlet exposed C Outlet isolatedB Inlet isolated D Outlet isolatedDuring each complete rotation of the claws, first the inlet port of eachpair is exposed (to admit gas to the pump), then both the inlet andoutlet are isolated (to trap and compress the gas) and finally the outletis exposed (to expel the compressed gas).BCPROCESS EXHAUSTP&ID example: Typical dry pump system with mechanical boosterand seal purge optionsAccessory modules offered include:Mechanical BoostersProvide increased pumping speed & improved ultimate. Availablewith:• Hydrokinetic drive for faster pumpdown• Rotation sensorsGas PurgesUsed to dilute flammables and improve seal life• Inlet purge*• Shaft seal purge*SafetyEdwards offer a comprehensive range of solutions to containmentand constructional safety, to satisfy ATEX or your own requirements.• Flame arrestors• Solvent flush*• Inlet isolation valves*VesselsSolvents and other liquids carried over in the process stream can berecovered upstream or downstream of the pump.• Knock-out pot*• Condenser*• Receiver*AcousticsSilencers reduce pulsations in the exhaust and hence noise in theexhaust line. All silencers are drainable.• SilencersMonitoring & ControlOfferings range from gauges and simple 4-20 mA transmitters to fullyenclosed bespoke control units.• Temperature transmitters• Pressure transmitters• Pressure gauges• Rotation sensors• Inverter drives• Control box* Denotes item is available with solenoid/switch control/actuation.# All additional control and sensor requirements to achieve zoning are supplied with theflame arrestor module.Shop online at www.edwardsvacuum.com