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nEXT300D Turbomolecular Pump CF100 Inlet Flange, 80W

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DN100CFOutlet flange DN25NW Pumping speed     N2 300 ls-1   He 340 ls-1   H2 280 ls-1 Compression ratio     N2 >1 × 1011   He 1 x 106   H2 5 x 104 Ultimate pressure with RV backing pump ISO/CF -8 /-10 mbar Recommended backing pump* RV12/nXDS10i Vent

Product Description


The nEXT300D is a hybrid bearing compound turbo pump available with either an ISO100 or a CF100 inlet flange and has a N2 pumping speed of 300ls-1. nEXT pumps combine our proven bearing technology (oil lubricated ceramic lower bearing with dry permanent magnetic upper bearing), an improved rotor design with a new molecular drag stage to deliver improved pumping speed and compression ratios, and true user serviceability. They feature 24V to 48Vd.c. sensor less motors with a built in drive that is fully compatible our range of TAG and TIC controllers. They are available pre-set for 80W or 160W maximum power, the former enabling use with our 100W TIC controllers are also recommended for pumping Argon, but with a longer ramp time to full operating speed.

A basic pump system would require a nEXT300D pump, a TAG or TIC controller, either an air or water cooling accessory or a suitable backing pump.


New technologies employed in nEXT have enabled the pumps to be serviced in the field. An interim oil lubrication change can be performed, where access allows, in-situ, typically in less than 5 minutes with the minimum of specialist tooling. A bearing and oil lubrication service, with minimum disassembly can be performed in less than 10 minutes using basic workshop tools and an Edwards tool kit. 
nEXT pumps will advise the user when a service is due and what level of intervention is required. The request for service is by a simple flashing LED sequence on the pumps, and by serial comms notification. 
Flexibility is again key as these simple services can be performed either by the end user, on site by an Edwards Field Service Technician or the pump can be returned to an Edwards service hub. 
If required, by using remote diagnostics, a user can also interrogate the pump to determine how long it is to the next service, so that a proactive approach to PM can be accommodated.

Features and Benefits

  • State-of-the-art rotor design enhances performance to deliver exceptional pumping speeds and compression ratios
  • Fully end user serviceable in minimum time without complex tooling or major disassembly...you can do it!
  • Compact design with high performance for efficient systemisation
  • Compatible with Edwards TIC turbo and instrument controllers meaning you can add up to 3 vacuum gauges without the need of an additional gauge controller
  • RoHS compliant and CSA/UL approved

Technical Data

Inlet flange DN100ISO-K, DN100CF
Outlet flange DN25NW
Pumping speed  
  N2 300 ls-1
  He 340 ls-1
  H2 280 ls-1
Compression ratio  
  N2 >1 × 1011
  He 1 x 106
  H2 5 x 104
Ultimate pressure with RV backing pump ISO/CF -8 /-10 mbar
Recommended backing pump* RV12/nXDS10i
Vent port 1/8 inch BSP female
Purge port 1/8 inch BSP female
Max continuous inlet flow (Nitrogen)  
Water cooling (water at 15°C, ambient temp at 40°C) 95 sccm
Forced air cooled, 35 °C ambient 115 sccm
Pump rotational speed  
Nominal rotational speed 60000 rpm
Standby rotational speed Variable from 33000 to 60000 rpm (42000 rpm default)
Programmable power limit settings Variable from 50-200W (160W default)
Start time to 90% speed 145s‡
Analogue outputs Pump rotational speed;
Power consumption; Pump temp; Controller temp
Cooling method# Forced air / water
Ambient air temp for forced air cooling 5 - 35°C
Min cooling water flow rate (water 15°C) 15 l h-1
Water temp range 10 - 20°C
Max inlet flange temp 80°C
Operating attitude Vertical and upright, through to 
Horizontal +/- 2°
Noise level at 1 metre  
Max magnetic field pump can tolerate 5 mT
Recommended controller TIC200 turbo and instrument controller
Quiescent electrical power Typically 20W

*  A smaller backing pump may be used depending on application. A suitable diaphragm pump with ultimate †  Above this inlet pressure, rotational speed drops to below nominal. 
‡  Power limit set to 160 W. 
#  Air and water cooling accessories must be ordered separately

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