[pure-silver] Re: air pump for Devere 108S
- From: Eric Nelson <emanmb@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Fri, 11 Jan 2008 09:36:13 -0800 (PST)
Here's my fan set up. It uses 2 ETRI model 125 XR
fans on either side of the head. This was added by
the previous owners for whatever their reasons. They
both blow out not in and are not that quiet but do
lack any high pitched dog whistles.
http://farm3.static.flickr.com/2212/2185092305_b6c19f87b9_o.jpg
I have no rattling or movement issues with this setup.
Eric
--- Shannon Stoney <shannonstoney@xxxxxxxxxxxxxxx>
wrote:
>
> On Jan 11, 2008, at 9:13 AM, Frank Filippone wrote:
>
> > This is an air pump to cool the head?
>
> Yes.
>
> >
> > There is no such thing as a quiet vacuum
> pump...... and your
> > description
> > does not indicate the air is used for the negative
> stage ( where a
> > vacuum
> > would be needed)
>
> The air comes through the head, and if the door to
> the negative stage
> is not shut very tightly, it rattles the negatives
> seriously,
> especially the big ones on big glass. I'm not sure
> what is supposed to
> be going on there. The enlarger had been modified a
> lot, and I had to
> modify it back to the way it was supposed to be
> originally (I think).
>
> >
> > But in both cases, you could run a pipe from the
> pump in the garage to
> > your
> > darkroom, isolating the noise somewhat..
>
> The new darkroom will be in a new house, and I don't
> think there is
> going to be a garage, but there might be a little
> outdoor storage shed.
>
> >
> > Use heating and cooling ( HVAC) wall tubing ... it
> is galvanized
> > tin.....
> > cheap and will work. But tape all your joints.
> >
> > Is the air pump running right? Is there a high
> pitched squeal or just
> > the
> > sound of air movement?
>
> There is a high pitched squeal. The air movement
> noise is not too
> bothersome.
>
> >
> > If you decide to replace the pump, you need larger
> input and output
> > "ports"
> > as most of the noise will be from these areas of a
> pump/compressor. In
> > fact, one cheat is to remove and all ducting,
> safety (!!!) and other
> > stuff
> > from the input and output areas, as this also will
> reduce the
> > noise.....but
> > it will make access to the blades too easy for
> little fingers...... so
> > use
> > this suggestion with knowledge that ou are making
> your pump less safe
> > by a
> > big margin...
>
> There is no output duct right now, and a guy at
> Odyssey Sales in the UK
> suggested that putting ducting on the output part
> would actually reduce
> the noise. I haven't tried this yet though.
>
> --shannon
>
>
>
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