Re: Freeze Dryer, Vacuum Pump and Oil filter Problems!
From: Muhammar (muhammar_at_hotmail.com)
Date: 07/29/04
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Date: 28 Jul 2004 19:47:47 -0700
Savant used to manufacture good vacuum products - but now that they
are part of Thermo concern they suck big way. Corporate death of good
small company. Looong delivery times, confused/incompetent sales dept,
sporadic tech support, etc. You need to contact somebody from
ThermoSavant division and get from her/him a phone number to the
actual engineer in Hollbrook in NY where they manufacture and repair
the stuff. Here is one competent custom. service person from Thermo
you can try to call: "Tania", tel. 800-972-7133 or
866-984-3766/ext.2059, FAX 740-373-6770 (attn. to Tania).
Ballast valve is a knob typicaly located on top of a pump. (It is
independent from oil filter). It lets small amount of air bleeding
into oil, removing more efficiently volatiles contaminating oil. The
trade-off is that the vacuum will worsen a bit and the pump will
produce more oil mist ("smoke") with ballast on.
Oil mist filters should last for at least a month. If lots of air gets
passed through the pump (=ie the vacuum you get is bad because of some
leak, for example or because of heavy use of your lyo), the oil mist
problem would get worse. Some systems have pumps equipped with oil
mist colletor/recirculator. Other systems simply pipe the oil mist
exhaust out into hood or vent.
Oil change - when you see the vacuum on closed lyo deteriorating. If
there is nothing hooked on lyo, the cold-trap is not overly iced-up
and your vacuum is still over 200mTorr, then oil change is probably
needed. (If vacuum stil does not improve, your pump is getting bad or
you have leak in the lyo). Also, you should change oil periodicaly,
perhaps at the beginning of every month.
Also, harass and educate the users. Do not let them use your lyo for
drying organic volatiles residues or water from unfrozen samples.
princzma@mcmaster.ca (Marta) wrote in message news:<a55642c6.0407281025.5aee9f26@posting.google.com>...
> Our lab bought a freeze dryer system second hand (ModulyoD), complete
> with a vacuum pump (VLP200)and oil recirculation filter (VPOF110) --
> all components are from Savant(Thermo).
>
> First, I am searching for documentation (operation and maintenance) on
> the pump and oil filter and would appreciate any information. I have
> tried to contact the manufacturer but they are not responding to my
> communication efforts!
>
> Second, I have been going through oil mist filters rather quickly --
> any ideas why? I've read this might be due to improper maintenance on
> the pump/oil system, eg. moisture in the oil. How often (in hours of
> usage) should I perform an oil change in the pump? Unfortunately the
> system was not purchased with an oil drain kit... Also, I've heard
> about running the pump with the gas ballast open -- what does this
> mean? And is this necessary if I have an oil recirculation filter
> (provided it is working properly?)
>
> I hope to change the filter in the VPOF110 but am having trouble
> taking the filter apart and finding replacement filters. HELP!
>
> Any advice/tips on this matter would be greatly appreciated!!!
> Thanks,
> Marta
- Next message: Josh Halpern: "Re: Diffusion Pump Problems"
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- In reply to: Marta: "Freeze Dryer, Vacuum Pump and Oil filter Problems!"
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