[Gasification] Reinventing wheels, and fans!

[Pete&Sheri]

Here is one of several links to bypass style vacuum motors.

http://www.electricmotorwarehouse.com/Dayton/ametek/ametek_b.htm

I Googled:
ametek lamb bypass vacuum motors
to get to it.

Ametek and Lamb are the brands we used 'way back then.
   I don't think we actually needed the bypass style in one machine we 
built, but they are quieter than the air-through style.  In our largest 
machine, an electron microscope turned backwards to write on microfilm,  
we had  3 roughing pumps, several cooling blowers and 4 of the simple 
Lamb air-through vacuum motors running at the same time, 24 hours a 
day.  It was so noisy that a few extra vacuum motors didn't matter.  Off 
topic, but the machine comsumed 5 1/2 KW of  3 phase 208 to produce a 
one microamp beam at 20,750 volts.
  In another stand alone machine (that copied microfilm to microfiche) 
that was usually located in a separate room, noise was an issue, so we 
used the bypass vacuum motors.

Pete Stanaitis
----------------

Mark Ludlow wrote:

>Got and literature or pictures, Pete? Or current URLs?
>Thanks, Mark
>
>-----Original Message-----
>From: gasification-bounces at lists.bioenergylists.org
>[mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of
>Pete&Sheri
>Sent: Saturday, November 13, 2010 4:56 PM
>To: Discussion of biomass pyrolysis and gasification
>Subject: Re: [Gasification] Reinventing wheels, and fans!
>
>At least a couple of mfrs make "bypass" style vaccuum motors.   'Way 
>back in the 1970's we used them for loop boxes on tape and film handling 
>systems.  IIRC, some of them were capable of around 12" WC compared with 
>the "through" models that could do 19" WC.  Not 12VDC, of course.
>
>Pete Stanaitis
>
>  
>
>
>
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