Edwards Limited, a leading manufacturer of sophisticated vacuum products
and abatement systems and a global provider of related value-added
services, has launched a special variant to its nXDS range of dry scroll
vacuum pumps which is ideally suited for pumping rare or critical gases.
Edwards' non-gas ballast variant nXDS-R
nXDS dry scroll pumps are free of lubrication in the entire pumped path
of the gas. The special variant nXDS-R is optimised for situations where
an application demands the pumping or recirculation of rare or critical
gases without the risk of accidental introduction of atmospheric air.
For example, as helium becomes a scarcer and increasingly expensive
resource, there is more desire to recover and re-use this rare gas. By
removing the gs ballast feature, which is significant for applications
where condensable vapour removal is important, this creates a
hermetically sealed pump from inlet to outlet with no moving seals and
no possibility of accidental introduction of atmospheric air.
David Steele, Market Sector Manager at Edwards, commented, "This nXDS-R
variant eliminates the need for a gas ballast fitting and so is ideal
for applications where it is critical that there is no accidental
contamination of the gas the vacuum pump is handling, such as
applications which require the pumping or recirculating of helium,
sulphur hexafluoride, xenon and other rare or expensive gases."
The advanced technology guarantees vacuum integrity for the customer.
The pump is lubricant free and hermetically sealed so it provides a
totally clean and dry vacuum. The bearings are isolated by the bellows,
so that all the pump's bearings are totally outside of the vacuum and
pumped gas path.
The pump offers a low cost of ownership due to its long service interval
(up to 5 years for the first service, depending on application), and it
is quickly and easily serviced without complex or expensive speciality
nXDS-R is incredibly easy to install and run. It is a simple 'fit and
forget' pump which provides excellent performance for many years. It has
low acoustic noise of only 52 dB(A) and is extremely quiet in the
laboratory - up to 20 times quieter than some comparable pumps.
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