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Re: Diffusion pump set-up

Posted By: John Anderson
Date: Monday, 7 August 2006, at 9:15 p.m.

In Response To: Re: Diffusion pump set-up (Travis*)

All things equal, you can usually see the oil condensing around 1 inch beyond the nozzle for an oil dif pump using DC704 or 705. If it's condensing further up toward the top, back off the heat - it's too high. If it's just barely clearing the nozzle, turn it up some.

You'll notice that in warmer weather the cascading is less evident and distinct. A small cooling fan on unit will help this.

You won't see any cascading until the dif pump has reached it's critical kick-in pressure - usually around 50 microns. Once it does kick in, you should see a dramatic plunge in pressure on your gauge.

> He is wrong. It should be actively
> cascading. I think by all rights the
> cascading effect will let you know that it
> at least somewhat doing its job.

> Look up svpneon.com to get more info. If you
> email or call Mark and talk nice enough he
> might even send you the info he sends with
> his diffusion pumps that explain the effect
> nicely.

Messages In This Thread

• Diffusion pump set-up -- Mike D. -- Saturday, 5 August 2006, at 7:33 p.m.
  • Re: Diffusion pump set-up -- Travis* -- Monday, 7 August 2006, at 2:50 a.m.
    • Re: Diffusion pump set-up -- John Anderson -- Monday, 7 August 2006, at 9:15 p.m.
      • Re: Diffusion pump set-up -- SVP Neon Equipment -- Monday, 7 August 2006, at 9:39 p.m.
  • Re: Diffusion pump set-up -- Mike D. -- Thursday, 10 August 2006, at 1:01 a.m.

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