Edwards xds35i, Instruction Manual, Page: 16 / 40

A730-01-880 Issue E
Page 10 © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
In
st
al
la
ti
on
3.2 System design considerations
Consider the following points when you design your pumping system:
Use a suitable valve to isolate the pump from your vacuum system if you need to allow the pump to warm up before
pumping condensable vapours or if you need to maintain vacuum when the pump is switched off.
Avoid high levels of heat input into the pump from the process gases, otherwise the pump may overheat, and cause
the thermal overload device to open.
If you use the pump in a high ambient temperature and have a high gas throughput, the temperature of the pump
body may approach 70 ºC and you must fit suitable guards to prevent contact with hot surfaces.
Make sure that the exhaust pipeline cannot become blocked. If you have an exhaust isolation valve, make sure that
you cannot operate the pump with the valve closed.
Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases to safe
concentrations.