The nEXT400D is a hybrid bearing compound turbo pump available with either an ISO160 or a CF160 inlet flange and has a N2 pumping speed of 400ls-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 an nEXT400D pump, a TAG or TIC controller, either an air or water cooling accessory and a suitable backing pump.

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 DN160ISO-K, DN160CF
Outlet flange DN25NW
Pumping speed  
  N2 400 ls-1
  He 390 ls-1
  H2 325 ls-1
Compression ratio  
  N2 >1 × 1011
  He 1 x 108
  H2 5 x 105
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) 105 sccm
Forced air cooled, 35 °C ambient 90 sccm
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 180s‡
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 70°C
Operating attitude Vertical and upright, through to
Horizontal +/- 2°
Noise level at 1 metre <45 dB(A)
Max magnetic field pump can tolerate 5 mT
Recommended controller TIC200 turbo and instrument controller
Quiescent electrical power Typically 20 W

*  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