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New diffusion pump

arcstarter
 

OK, I just bought a used diffusion pump.
Inlet is about 3 inches.
Outlet is about 1 inch.
Height is about 12 inches.
Water cooled with normally closed thermostat device on the water
jacket.

Since I don't have a spec sheet, I am at a bit of a loss as to how
to proceed. For instance, how do I determine what volume of oil to
use? The label indicates that this is an Alcatel model 6063 (which
I have looked for on the 'net but not been able to find specs on).
There are fields on the label for power, liters/minute etc but the
numbers were not inserted!

The heater is also a bit of a mystery. There are apparently two
heating elements, currently wired in series but with all three leads
coming out of the can. Element one (which is physically located on
the outside edge of the heating base) measures 134 ohms. Element
two (which is located in the center of the base) measures 248 ohms,
but has heavier gauge wires than the outer heater.

Rumor has it that this is wired for 220 volts, but this is not
necessarily accurate. There is a 4th wire which is tied to the pump
chassic ground and is not shared with the heaters. If 220 volts
were applied to these two elements in series - power would be about
126 watts. Is this wattage in the ballpark for a water-cooled unit?

The other way to wire it would be to apply 220 across the elements
in parallel, whcih would produce ~560 watts total dissipation -
which seems perhaps a bit more reasonable for the water-cooled
jacket?

Can anyone advise me about typical wattages for a unit of these
dimensions? Does anyone have information on a dual-coil heating
element for these sorts of things?

Thanks in advance!
-Bill
Gomez
 

On Tuesday, November 4, 2003, at 09:48 AM, arcstarter wrote:

OK, I just bought a used diffusion pump.
Inlet is about 3 inches.
Outlet is about 1 inch.
Height is about 12 inches.
Water cooled with normally closed thermostat device on the water
jacket.

Since I don't have a spec sheet, I am at a bit of a loss as to how
to proceed. For instance, how do I determine what volume of oil to
use? The label indicates that this is an Alcatel model 6063 (which
I have looked for on the 'net but not been able to find specs on).
There are fields on the label for power, liters/minute etc but the
numbers were not inserted!
Have you tried calling up Alcatel?


The heater is also a bit of a mystery. There are apparently two
heating elements, currently wired in series but with all three leads
coming out of the can. Element one (which is physically located on
the outside edge of the heating base) measures 134 ohms. Element
two (which is located in the center of the base) measures 248 ohms,
but has heavier gauge wires than the outer heater.
Differential heating of diffusion pumps is mentioned in the literature,
to achieve a temperature gradient across the base of the stack, from
inside to outside. This is probably in support of that, although
without the technical docs, there's probably no way to tell how to
set yours up correctly.
 

Bill
One of the pumps?I bought had a plug normaly used for 220V --I pulled the cartridge out and it was stamped 110V ---Glad I checked!
if you can match?the size?your pump with a catalouge pump??you can try using the same amount of oil. I haven't got any idea how critical the oil level is.?
arcstarter wrote:

OK, I just bought a used diffusion pump.
Inlet is about 3 inches.
Outlet is about 1 inch.
Height is about 12 inches.
Water cooled with normally closed thermostat device on the water
jacket.

Since I don't have a spec sheet, I am at a bit of a loss as to how
to proceed.? For instance, how do I determine what volume of oil to
use?? The label indicates that this is an Alcatel model 6063 (which
I have looked for on the 'net but not been able to find specs on).?
There are fields on the label for power, liters/minute etc but the
numbers were not inserted!

The heater is also a bit of a mystery.? There are apparently two
heating elements, currently wired in series but with all three leads
coming out of the can.? Element one (which is physically located on
the outside edge of the heating base) measures 134 ohms.? Element
two (which is located in the center of the base) measures 248 ohms,
but has heavier gauge wires than the outer heater.

Rumor has it that this is wired for 220 volts, but this is not
necessarily accurate.? There is a 4th wire which is tied to the pump
chassic ground and is not shared with the heaters.? If 220 volts
were applied to these two elements in series - power would be about
126 watts.? Is this wattage in the ballpark for a water-cooled unit?

The other way to wire it would be to apply 220 across the elements
in parallel, whcih would produce ~560 watts total dissipation -
which seems perhaps a bit more reasonable for the water-cooled
jacket?

Can anyone advise me about typical wattages for a unit of these
dimensions?? Does anyone have information on a dual-coil heating
element for these sorts of things?

Thanks in advance!
-Bill


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James Lerch
 

----- Original Message -----
From: "RON WHITE" <ron_white@...>
To: <VacuumX@...>
Sent: Tuesday, November 04, 2003 20:17
Subject: Re: [VacuumX] New diffusion pump


Bill
if you can match the size your pump with a catalouge pump you can try using
the same amount of oil. I haven't got any idea how critical the oil level is.

Hi Guys,

Not sure how critical the oil level is either. When I put mine together, after
taking the DP apart (ya gotta take it apart just to see how it works inside!
:) ) Anyway, while I had it apart I observed a dark brown "Oil Level" line of
'Crude' on the side of the internal chimney stack. After scoring the line with
a file to create a permanent mark, I just cleaned everything with acetone,
re-assembled, and filled it back up with fresh oil to my "oil level" mark I
made.

BTW, while you have your pump apart, could you document the guts of it with some
pictures? I've had several requests for pictures or sketches, and it would be
nice to have some for referrals.

Best of luck,
James

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