The nEXT is a hybrid bearing compound turbomolecular pump. 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 user serviceability. They feature 24 V to 48 V d.c. sensor less motors with a built in drive that is fully compatible with our range of TAG and TIC controllers. They are available pre-set for either 80 W or 160 W maximum power, the former enabling use with our 100 W TIC controllers are also recommended for pumping Argon, but with a longer ramp time to full operating speed.
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.
Inlet flange | DN100ISO-K, DN100CF |
Outlet flange | DN25NW |
Pumping speed | |
N2 | 240 ls-1 |
He | 230 ls-1 |
H2 | 165 ls-1 |
Compression ratio D / T | |
N2 | >1 × 1011 |
He | 3 x105 / 1 x106 |
H2 | 1 x 104 / 1.5 x 104 |
Ultimate pressure with RV backing pump ISO/CF | <6 x 10-8 / <5 x 10-10 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) | 45 sccm |
Forced air cooled, 35 °C ambient | 30 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 D / T 160 W | 115 / 140 |
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 | 75°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 20W |
* A smaller backing pump may be used depending on application. A suitable diaphragm pump with ultimate <5 mbar may also be used e.g. XDD1.
† Above this inlet pressure, rotational speed drops to below nominal.
# Air and water cooling accessories must be ordered separately
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