Venting Gas Specification And Vent Control Data - Edwards T-Station 300 Instruction Manual

▪ Air
▪ Carbon monoxide
▪ Neon
▪ Ethane
▪ Methane
▪ Nitrogen
▪ Krypton
▪ Argon
▪ Propane
▪ Carbon dioxide
▪ Helium
▪ Hydrogen
▪ Butane
The pump can be used to pump oxygen and water vapour, subject to the following
conditions:
▪ Oxygen - When the pump is purged by an inert gas, oxygen can be pumped at
concentrations above 20% by volume. Refer to the nEXT pump instruction manual
(B80000880) for purge gas specification. However, if the pump is not purged, the
oxygen concentration must be less than 20% by volume.
▪ Water vapour - Ensure that vapour does not condense inside the pump.
To pump a gas not in the list above, contact the supplier for advice. Failure to contact the
supplier may invalidate the warranty on the pump. The pump is not suitable for pumping
aggressive or corrosive gases.
Note:
Concentrations of gases may be modified by the compression of the pump.

3.5 Venting gas specification and vent control data

Although the pump may be vented to atmosphere, high relative humidity of the air may
greatly increase the subsequent pump down time. To reduce pump down times the
pump should be vented with dry, clean gases.
Refer to the nEXT pump instruction manual (B80000880) for the vent valve connection.
Refer to
Table 4 Vent gas specification and vent control
Vent gas specification and control
Vent gas
Maximum dew point at atmospheric pressure -22 °C
Maximum size of particulates
Maximum concentration of oil
Recommended time for rotational speed to
reach 50%
D39595880_A
D39595880_A - Technical data
Vent valve screen on page 28 for configuring the venting options.
Reference data
Dry air, nitrogen, argon or other inert
gases
1 μm
0.1 parts per million
> 15 seconds
Page 14 10/2020 - ©Edwards Limited