Re: Caring and feeding an Edwards speedivac?

Hi Nick,

I restored one of these pumps a couple of years ago. They're great
little machines. Here are some before and after pictures of mine:
http://www.mythic-beasts.com/~cdt22/vp_as_found.jpg
http://www.mythic-beasts.com/~cdt22/vp_as_found.jpg

If you haven't already done so, it's a good idea to drain all the oil
and remove the water, even if you use the same oil again. There was
perhaps 1/4 to 1/2 pint of water in my pump.

I believe the valve you mention is the "gas ballast valve". Opening it
helps avoid the pump collecting water, but reduces the ultimate vacuum
attainable.

Edwards don't keep spares for these pumps anymore, but there are a
couple of companies in the UK which do. I got my parts from GE
Scientific and Island Scientific (I can find URLs and phone numbers if
you need them).

Edwards did however send me the maintenance manual for their early
belt driven pumps. I've put it online for you here. It's a big file
(around 18 MB in size):
http://www.ruggedmachines.com/docstore/manuals/ES&ED_Series_Maintenance_Manual.pdf

What model is your pump? Mine is an ED 35.

Best wishes,

Chris

.

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