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Re: NEON- Re: air supply problems & surge tanks
Jim,
I found that using 4" PVC (I recall I had something like 15 to 25 feet
of it running along the back of my shop) and taking the lines to my
fires directly off of that eliminated any surging at all, even in my
crossfires when turning the ribbon burner on and off repeatedly.
Bettina
jim marshall wrote:
>
> I have just moved my air blower outside into its own shed to reduce
> noise in the shop. While doing this, I took the opportunity to
> increase the size of the plumbing between the blower and the manifold.
> In my old arrangement, the 2.5 outlet from the roots blower was
> immediately reduced to 1 pipe and a tee. The side outlet of the tee
> connected to the air regulator, while the straight thru connection
> enlarged to 3 PVC for the additional 40 feet to the manifold. This
> arrangement supplied a reasonably steady supply of air but was noisy
> and required adjustment to the mixtures on my cannon and cross fires
> anytime the ribbon fire was in use. My new configuration is about the
> same as my old one, except I stay at 2.5 until I hit the 3 PVC. Now
> I have plenty of air to drive all fires simultaneously.
>
> Unfortunately, the air supply now contains a 8 to 10 cps pulse that I
> suspect can only be dampened with a surge tank. Any thoughts?
>
> Assuming that what I suspect is correct, what are the physics of a
> surge tank? Is it just an empty tank or does it contain some
> arrangement of baffles to cancel out the modulation in the air stream?
> Could I build a surge tank from a 30 or 55 gallon drum?
>
> Any advice would be appreciated.
>
> Jim
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