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On Sat, 04 Nov 2006 16:08:44 -0500, GeorgeB <nospam@att.net> wrote:
>On Fri, 03 Nov 2006 22:59:08 -0500, "Roger (K8RI)"
><ValidAddress@my.com> wrote:
>
>>I've a 1/2" galvanized line running across the west end of the shop.
>
>We generally don't recommend galvanized ... if flakes off and messes
>up things. Black pipe or copper is commonly used. If you need the
>corrosion protection, stainless welded tubing is pretty reasonably
>priced.
I have run a lot of 1/4 and 1/2 SS tubing and that sure would be a lot
easier than making a run of black iron to replace the galvanized. As
the outlets into the regulators are filtered I do not think the
galvanized will be a problem. We used it back when I worked in the
instrument shop...in a previous life, long, long ago.
>
>>At any rate I am trying to figure the safest way to have the ability to
>>hook the air hoses to either supply safely. For some things the
>>regulated just cannot supply enough air as in sand blasting.
>
>In the hydraulic world, we use "velocity fuses" or "hose break valves"
>for applications like this. I do not know of a pneumatic equivalant,
They do exist, but I have never seen them in this range. They are used
in gas lines where the house feed ties into the main. As the regulator
steps the pressure down from around 10 PSI to about 10 inches a
typical gas line is low flow. If the regulator or gas line gives out
the thing is supposed to snap shut, but that is on far less flow that
I'll be using and there probably won't be much difference in flow
from my using it, or if the end blew off. Once in a great while a
heavy truck going into a residential area may trigger one or two at
the gas main (underground) to the dismay of residents and power
company alike.
>but it may exist. One of my customers has solenoid valves on every
>air line outlet, for different purposes, but they may meet your need
>with an "e-stop" string of NC pushbuttons supplying them.
I would think a NO, spring loaded pushbutton would make a good kill
switch.
>
>I will look into the velocity fuse for compressed fluids next week.
>
>George
Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
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Re: Slightly OT: Shop high pressure air manifold.
