Edwards nEXT200200 - Materials Exposed to Gases Pumped

▪ Methane
▪ Propane
▪ Butane
▪ Carbon monoxide
▪ Nitrogen
▪ Hydrogen
▪ Carbon dioxide
▪ Neon
▪ Krypton
▪ Helium
▪ Ethane
▪ Argon
T
o pump a gas that is not listed, contact the supplier for an advice. Failure to contact the
supplier can invalidate the warranty of the pump. The pump is not applicable for
pumping aggressive or corrosive gases.
The pump can be used to pump the oxygen and water vapour, with the condions that
follows:
▪ Oxygen - when the pump is purged by an inert gas, oxygen can be pumped at a
concentraon above 20% by volume. Refer to Purge gas specicaon on page 23
for purge gas specicaon. If the pump is not purged, the oxygen concentraon
must be less than 20% by volume.
▪ Water vapour - Make sure that the vapour does not condense in the pump. Refer
t
o Water cooling on page 55.
3.8 Materials exposed to gases pumped
The materials and component types that are exposed to the gases pumped are:
▪ Aluminium alloys
▪ Stainless steels
▪ Fluoroelastomer and nitrile O‑rings
▪ Hydrocarbon lubricant
▪ Rare earth magnets
▪ Silicon nitride
▪ Carbon bre reinforced epoxy resin
▪ Fire retardant polypropylene
▪ Polyamide
▪ PVC
▪ Titanium
▪ Silicon
▪ Torlon
▪ Ceramic
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B85200880_D - Technical data