|
Hi all,
?
I'm new to this group - looks like some of you have
some fancy rigs I could only dream of. AnywayI've just dug out a very old
Edwards single stage speedi-vac pump, model 1sc50, which has been on the shelf
for many years. When I started it up, it did not produce hardly any vacuum (
only an absolute pressure of about 600 mbar, which is useless!!!). Before I
start stripping it down, I was wondering if anyone had or could point? me
towards a manual? This pump is probably?around 50 years old, but I remember
it being refurbished by Edwards around 1975 and it hasn't been used since
then.
?
many thanks in anticipation,
?
James
|
Not to be a jerk or anything, but did you check the oil level?
________________________________________
The most fundamental human right is ownership
of your own body. If you may not do with it
however you please, you are not yet free.
|
Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE]
If there is water sitting under the oil it will not do vacuum
well either.? Did you drain the oil and put in a fresh charge ???? I have to do
that about every 8 hours here is soggy Florida.
?
Drew
?
From:
VacuumX@... [mailto:VacuumX@...] On Behalf Of Gomez
Addams
Sent: Tuesday, June 22, 2010 2:10 PM
To: VacuumX@...
Subject: Re: [VacuumX] Pump manuals
?
?
Not to be a jerk or anything, but did you check
the oil level?
________________________________________
The most fundamental human right is ownership
of your own body. If you may not do with it
however you please, you are not yet free.
|
Have you open the Gas Ballast on the pumps??? This helps removes water vapor.
|
--- On Tue, 6/22/10, Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE] wrote:
From: Aurigema, Andrew N. (KSC-ASRC-491)[ASRC AEROSPACE] Subject: RE: [VacuumX] Pump manuals
To: "VacuumX@..." <VacuumX@...>
Date: Tuesday, June 22, 2010, 2:20 PM
?
If there is water sitting under the oil it will not do vacuum
well either.? Did you drain the oil and put in a fresh charge ???? I have to do
that about every 8 hours here is soggy Florida.
?
Drew
?
From:
VacuumX@yahoogroups .com [mailto:VacuumX@ yahoogroups. com] On Behalf Of Gomez
Addams
Sent: Tuesday, June 22, 2010 2:10 PM
To: VacuumX@yahoogroups .com
Subject: Re: [VacuumX] Pump manuals
?
?
Not to be a jerk or anything, but did you check
the oil level?
____________ _________ _________ _________ _
The most fundamental human right is ownership
of your own body. If you may not do with it
however you please, you are not yet free.
|
If you have
a sight window look to see if the oil lever is up to the mark.?
If it is that old I would drain and replace the
oil.
Make sure the ballast valve is not fully open so you are not just
pumping through the valve and not the system. I would start with the
valve fully closed and then if you have trouble with water getting in
your oil and making it froth up and lose pumping speed you can begin
opening he valve is stages. It is best to let in dry air if it is
available.
Don
Hi
all,
?
I'm new to
this group - looks like some of you have some fancy rigs I could only
dream of. AnywayI've just dug out a very old Edwards single stage
speedi-vac pump, model 1sc50, which has been on the shelf for many
years. When I started it up, it did not produce hardly any vacuum (
only an absolute pressure of about 600 mbar, which is useless!!!).
Before I start stripping it down, I was wondering if anyone had or
could point? me towards a manual? This pump is
probably?around 50 years old, but I remember it being refurbished
by Edwards around 1975 and it hasn't been used since
then.
?
many thanks
in anticipation,
?
James
--
____________________________________
Donald M. Mattox
Society of Vacuum Coaters
71 Pinon Hill Place NE
Albuquerque, NM? 87122-1914
Telephone 505/856-7188
FAX 505/856-6716
E-mail donmattox@...
WebSite? http://www.svc.org
|
All,
?
many thanks for your suggestions, I'll check
through what you have said and get
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Wednesday, June 23, 2010 3:29
PM
Subject: Re: [VacuumX] Pump manuals
?
If you have a sight
window look to see if the oil lever is up to the mark.? If it is that
old I would drain and replace the oil.
Make sure the ballast valve is not fully open so you are not just pumping
through the valve and not the system. I would start with the valve fully
closed and then if you have trouble with water getting in your oil and making
it froth up and lose pumping speed you can begin opening he valve is stages.
It is best to let in dry air if it is available.
Don
Hi
all,
?
I'm new to this
group - looks like some of you have some fancy rigs I could only dream of.
AnywayI've just dug out a very old Edwards single stage speedi-vac pump,
model 1sc50, which has been on the shelf for many years. When I started it
up, it did not produce hardly any vacuum ( only an absolute pressure of
about 600 mbar, which is useless!!!). Before I start stripping it down, I
was wondering if anyone had or could point? me towards a manual? This
pump is probably?around 50 years old, but I remember it being
refurbished by Edwards around 1975 and it hasn't been used since
then.
?
many thanks in
anticipation,
?
James
--
____________________________________
Donald M.
Mattox
Society of Vacuum Coaters
71 Pinon Hill Place NE
Albuquerque,
NM? 87122-1914
Telephone 505/856-7188
FAX
505/856-6716
E-mail donmattox@svc.org
WebSite?
http://www.svc.org
|
All,
?
many thanks for your suggestions, I'll check
through what you have said and get back to you with the results,
?
James
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Wednesday, June 23, 2010 3:29
PM
Subject: Re: [VacuumX] Pump manuals
?
If you have a sight
window look to see if the oil lever is up to the mark.? If it is that
old I would drain and replace the oil.
Make sure the ballast valve is not fully open so you are not just pumping
through the valve and not the system. I would start with the valve fully
closed and then if you have trouble with water getting in your oil and making
it froth up and lose pumping speed you can begin opening he valve is stages.
It is best to let in dry air if it is available.
Don
Hi
all,
?
I'm new to this
group - looks like some of you have some fancy rigs I could only dream of.
AnywayI've just dug out a very old Edwards single stage speedi-vac pump,
model 1sc50, which has been on the shelf for many years. When I started it
up, it did not produce hardly any vacuum ( only an absolute pressure of
about 600 mbar, which is useless!!!). Before I start stripping it down, I
was wondering if anyone had or could point? me towards a manual? This
pump is probably?around 50 years old, but I remember it being
refurbished by Edwards around 1975 and it hasn't been used since
then.
?
many thanks in
anticipation,
?
James
--
____________________________________
Donald M.
Mattox
Society of Vacuum Coaters
71 Pinon Hill Place NE
Albuquerque,
NM? 87122-1914
Telephone 505/856-7188
FAX
505/856-6716
E-mail donmattox@svc.org
WebSite?
http://www.svc.org
|
Well, I was not getting anywhere, so I decided it
was time to look inside. I stripped the pump down and found a couple of things
wrong; the first was straight forward (and thanks to those who pointed me in the
right direction), the oil was a bit 'gloopy' and there was debris in the bottom
of the pump. I gave it a good clean and some new oil. The second was that this
rotary vane pump must have been made in the dark ages, the position of the rotor
and the outer casing is adjustable, although how your supposed to adjust it I
don't know. When I took it apart there was a large gap between the low and high
pressure chambers, so the pump was short circuiting itself. I reassembled the
unit with as narrow a gap as I dared and ran it up. Bingo! it now works a treat,
although I cant measure the ultimate vacuum; I'll look at purchasing something
suitable in the near future. (The pump claims 0.01 mbar, but I doubt a single
stage pump will achieve that in practice). The oil I used wasn't vacuum pump
oil, as it was a bit pricy; as I had a source of compressor oil?(as in
airconditioning compressors), I used that, reasoning that it should have a
relatively low vapour pressure to work ok in a compressor. Does anyone have
experience using this type of oil?
?
anyway thanks for your advice and
help,
?
regards
?
James
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Wednesday, June 23, 2010 4:45
PM
Subject: Re: [VacuumX] Pump manuals
?
All,
?
many thanks for your suggestions, I'll check
through what you have said and get back to you with the results,
?
James
----- Original Message -----
Sent: Wednesday, June 23, 2010 3:29
PM
Subject: Re: [VacuumX] Pump
manuals
?
If you have a
sight window look to see if the oil lever is up to the mark.? If it
is that old I would drain and replace the oil.
Make sure the ballast valve is not fully open so you are not just
pumping through the valve and not the system. I would start with the valve
fully closed and then if you have trouble with water getting in your oil and
making it froth up and lose pumping speed you can begin opening he valve is
stages. It is best to let in dry air if it is available.
Don
Hi
all,
?
I'm new to this
group - looks like some of you have some fancy rigs I could only dream of.
AnywayI've just dug out a very old Edwards single stage speedi-vac pump,
model 1sc50, which has been on the shelf for many years. When I started it
up, it did not produce hardly any vacuum ( only an absolute pressure of
about 600 mbar, which is useless!!!). Before I start stripping it down, I
was wondering if anyone had or could point? me towards a manual? This
pump is probably?around 50 years old, but I remember it being
refurbished by Edwards around 1975 and it hasn't been used since
then.
?
many thanks in
anticipation,
?
James
--
____________________________________
Donald M.
Mattox
Society of Vacuum Coaters
71 Pinon Hill Place
NE
Albuquerque, NM? 87122-1914
Telephone 505/856-7188
FAX
505/856-6716
E-mail donmattox@svc.org
WebSite?
http://www.svc.org
|
