There are sometimes situations at users locations where the pump is
located in an area exposed to ambient temperatures as one would expect by
being outside or in un-temperature controlled rooms. There can be
difficulties sometimes with cold starting of the pump. The oil in
most of the vacuum pumps has a pour point of roughly 5-15 degrees F.
If the temperature is below this then the oil in the pump is not fluid and
will cause difficulty in starting the pump or the pump may not turn over
The solution for this is to install a oil sump heater in the
pump itself and
have a time / temperature rise in the oil prior to starting the
pump. We have incorporated this solution into the pump designs
before and it seems to serve the purpose.
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