Edwards nEXT 300 Turbo Molecular Pump

The Edwards  nEXT300D and nEXT300T  turbo molecular pumps  consist of a turbo molecular pump with a permanently attached controller containing drive electronics. The controller controls the electrical supply to the pump with the exception of standby speed control. It has no manual controls and can only be operated through the logic interface. To operate the nEXT 300 pump you must connect it to your own control equipment and power supply or alternatively use the Edwards TIC Turbo Instrument Controller or TIC Turbo Controller. The 'D' or 'Duplex' variant  has turbo molecular blades and a drag mechanism that allows operation at higher backing pressures than the pure turbo molecular pumps. The 'T' or 'Triplex' variant has turbo molecular blades, a drag mechanism and a regenerative mechanism. The regenerative stage gives the option to utilize 'boost' mode The New Edwards nEXT300 pumps are supplied with an inlet-screen fitted into the centering O-ring for ISO version pumps and into envelope for CF version pumps. nEXT300D pumps with an NW 25 interstage-port are supplied with an inlet-strainer that fits into the interstage-port. The inlet-screen and inlet-strainer protect the pump against damage that would be caused by debris entering the pump. Not included with refurbished pump.The Edwards Turbo pump is supplied with a manual vent-vavle fitted; this can be replaced with a TAV5 or TAV6 solenoid-operated vent-valve. The TAV valve can be directly controlled by the on-board controller. The nEXT pumps have a purge-port: an inert purge gas can be introduced to protect the bearing and motor from corrosion. An optional vent-port adapter and purge restrictor can be fitted to the purge-port to control the flow rate of the purge gas and to filter the gas supply. Air cooling and a water-cooling block are available.   

nEXT 300 Specification/Instruction Manual