Vacuum Pump Ambient Temperature Concern

[balagast]

I am planning on using a Dry Vacuum pump (multi-stage roots type) for a client. The ambient temperature in the operations room I speculate will be very close to the listed maximum ambient temperature for the pump (40 degrees C).

What I would like to know is if anyone here has experience dealing with this type of issue. Is the ambient temperature concern have to do with expansion of internal parts in the pump? I don't suspect it is the motor that is the concern because the motor is cooling with water.

Other than a fan I don't know what I can really do to help cool the fan. Even that I don't think will have much of an effect.

Also, I have contacted the manufacturer about the concerns, but I first wanted to possibly get some neutral opinions on the matter.

 

[btrueblood]

One possible problem with the blower is the type of bearings. If oil-bath bearings, not a big issue and these blowers can run pretty hot (I know we ran some roots blowers up near 180 F, for instance). But your pump may have grease-filled end bearings on the ends away from the timing gears, and these may not like high temperatures.

 

[balagast]

Yes after consulting the Installation and Maintenance Manual I found that the LP (low pressure) end bearing do use a fluorinated grease.

 

[EdStainless]

The mfg may want to change the grease for a higher temp grade.
It is worth paying them to do it.

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