Edwards nXDS Series - Pumping Media; Performance Characteristics

A735-01-880 Issue C
Page 8 © Edwards Limited 2017. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Technical data
2.2.2 Pumping media
The pump is designed to pump the following gases:
 Air
 Carbon dioxide
 Helium
 Carbon monoxide
 Nitrogen
 Argon
 Oxygen (O
2
)
The pump can be used to pump water vapour. Caution must be taken to ensure that vapour does not condense inside
the pump. Refer to Section 4.6.1 on how to prevent condensation of water vapour in the pump.
If pumping a vapour or gas not in the list above, contact Edwards for advice.
2.2.3 Performance characteristics
The position of the gas ballast control defines the performance characteristics of the pump. These performance
characteristics are listed in Table 5.
WARNING
Do not use the nXDS pump to pump pyrophoric or explosive gas mixtures.
Table 5 - Performance characteristics
Description nXDS6i nXDS10i nXDS15i nXDS20i
Pump ultimate
(mbar)
Gas ballast position 0 2 x10
-2
7 x 10
-3
7 x 10
-3
3 x 10
-2
Gas ballast position 1 5 x 10
-2
4 x 10
-2
4 x 10
-2
6 x 10
-2
Gas ballast flow
(l min
-1
)
Gas ballast position 1 12 16 31 24