Edwards nEXT nEXT85 - Materials Exposed to Gases Pumped

CAUTION: OXYGEN CONTENT IN GASES
Risk of damage to equipment. Do not use the pump to pump gases that contains
more than 20% oxygen. This can cause the lubricant to polymerise and the pump can
fail.
Note:
Concentraons of gases can be changed by the compression of the pump.
The pump is designed to pump the gases that follow:
▪
Air
▪
Carbon monoxide
▪
Neon
▪
Nitrogen
▪
Krypton
▪
Argon
▪
Carbon dioxide
▪
Helium
▪ Hydrogen
To pump a gas that is not listed, contact the supplier for advice. Failure to contact the
supplier can invalidate the warranty of the pump. The pump is not applicable for
pumping aggressive or corrosive gases.
Refer to the manufacturer's Vacuum Pump and Vacuum Safety manual P40040100 for
safety informaon related with the specicaon, design and operaon of vacuum
pumps and vacuum systems.
The pump can be used to pump the oxygen and water vapour, with the condions that
follow:
▪ Oxygen - The oxygen concentraon must be less than 25% by volume.
▪ Water vapour - Make sure that the water vapour does not condense in the pump.
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 O‑rings
▪
Hydrocarbon lubricant
▪
Felt
▪
Rare earth magnets
▪
Silicon nitride
▪
Titanium
▪
PTFE
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B8G000880_D - Technical data