Edwards nEXT85 User Manual

Parameter Force air
cooling
(20 °C ambient)
Natural
convecon
(35 °C ambient)
Force air
cooling
(40 °C ambient)
Water cooling
(40 °C
ambient)
*
Maximum connuous
backing pressure (at
ulmate inlet pressure)
§
(mbar)
18 10 11 17
Maximum input ow sccm:
N
2
60 22 25 42
He 232 96 128 191
Ar 21 7 7 15
*
Cooling water temperature 15 °C at a ow rate of 15 l hr
-1
.
§
Values for maximum connuous inlet pressure obtained using an nXDS15i backing pump at sea level in negligible
magnec eld. Values for maximum connuous backing pressure obtained under no ow condions at sea level in
negligible magnec eld. Refer to Cooling on page 32 for cooling condions. Above these pressures, rotaonal
speed drops below nominal.
Parameter
Value
Recommended backing pump nXDS15i
Operaon atude Vercal and upright to horizontal ± 2 °
Normal rotaonal speed 90,000 revoluons per minute
Starng Time to 90% Speed (80 W) 130 seconds
Starng Time to 90% Speed (120 W) 90 seconds
Sound pressure level, at ulmate vacuum
measured at 1 m from the pump to ISO3744
34 dB(A) ± 2.5 declared dual number noise
emission values in accordance with ISO4871
Pumped media
WARNING:
Vent dangerous gases and gas mixtures safely. Do not expose people to these gases. If
pumping hazardous gases or vapours, observe the safety recommendaons of the supplier
of the gas/vapour.
WARNING:
Do not use the pump to pump pyrophoric or explosive gas mixtures as it is not suitable for
this purpose. The pump and its connecons are not designed to contain an explosion.
WARNING:
In the interstage version of the pumps, gas pumped through the interstage port will mix
with gas pumped through the pump inlet. Ensure that the gases will not react or combine
to form dangerous gases and substances.
B8G0-00-880A - Technical Reference
Page 87

Edwards nEXT85 Specifications

General

Brand	Edwards
Model	nEXT85
Category	Water Pump
Language	English