Fwd: Gone - Re: Roughing Vacuum pump for Mars Fnd or Mojave or Brandon's concrete research

[Ethan Chew]

Hello,

     Would anyone be interested in a free Medium (25 to 1×10⁻³ Torr) Vaccum pump capable of less than 6*10^-3 mbar?  It is a fixer-upper.  Please call Bruce at 781-944-7027.

                - Ethan

---------- Forwarded message ----------
From: Bruce Mackenzie gm <BMack...@alum.mit.edu>
Date: Mon, Jun 24, 2013 at 7:46 PM
Subject: Gone - Re: Roughing Vacuum pump for Mars Fnd or Mojave or Brandon's concrete research
To: Ethan Chew <Space...@gmail.com>, Brandon Larson <sgts...@csu.fullerton.edu>
Cc: Bruce Mackenzie gm <BMack...@alum.mit.edu>, Casey Steuer <CSt...@marsfoundation.org>, Greg Brown <Greg...@marsfoundation.org>


Someone else is getting the vacuum pump.   No need to dream about how
to use it for Mars research.

There is a tiny chance we could get it by asking to be notified if the
first person
can't move it of does not want it after all.

 - Bruce


On Mon, Jun 24, 2013 at 10:28 PM, Bruce Mackenzie gm
<BMack...@alum.mit.edu> wrote:
> After talking with Brandon -
>
> The following vacuum pump might be worth trying to get for the Mars
> Foundation and/or Mojave Makers /  Brandon's concrete, or Ethan's suit.
>
>  http://www.pchemlabs.com/product.asp?pid=2361
>
> I can ask for it to be donated to the Mars Foundation, and then in turn
> be on indefinite loan to Mojave Makers.
> Or, one of you can ask for it.
>
> It is being given away for free, in Massachusetts.
> Probably 1st come / 1st served.
> I have no idea if others already asked for it.
> It may take considerable cash to refurbish it, and to ship it to Calif,
> also a cost to crate it up.
>
> I spent 4 minutes trying to get an estimated freight cost,
> and gave up because 3 different web sites wanted me to register and
> give exact addresses, customer passwords, etc.
>
> It probably has not been used in 3+ years, but probably does still have oil,
> or at least was not deliberately drained of oil.
>
> Note, if it really can get down to  "6-10^-3 mbar"
> that is far lower than Mars pressure.
> No estimate as to how long it would take to get a given volume down to
> a given pressure.
>
> Call me any time after 3am CDT if you want me to ask for it.
>
>
>> Old Pfeiffer Duo 120 A vacuum pump 208V 50/60 Hz.  "Pumping Speed" is "120" and "speed of rotation" is marked as 9 65/1155.  The online data at http://www.pchemlabs.com/product.asp?pid=2361 says the pumping speed is 129 m^3 per hour.  Of course, that's for a  freshly refurbished pump.
>>
>> It's probably about 500 lbs, sitting on a pallet in NW13's basement.  Its deactivated.  I'm told it worked last time it was used, but a maintenance cycle is recommended.  Supposedly this will get you down to 6-10^-3 mbar, but as a 10+ year old model, I'd expect less performance unless/until its refurbished.
>
>
> thanks,
>  - Bruce Mackenzie
>    Mars Foundation
>    BMack...@alum.mit.edu
>    (USA 1) 781-944-7027  (office & text msg)
>    781-249-5437   (mobile, not text)
>    Skype: BruceMacknz ,  GMail chat: BMacknz

[Ethan Chew]

Good deal.  Thank-you for the update.

On Mon, Jun 24, 2013 at 11:16 PM, Brandon Larson <sgts...@csu.fullerton.edu> wrote:

We already talked about it. The thing weighs close to 500 lbs and needs an overhaul. I could do the overhaul but the freight costs and finding a place for it would make it more trouble than it is worth. Aside from that, someone already claimed it.