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Take a look at PArker's pneumatic velocity fuse ...
http://www.parker.com/hydraulicvalve/cat/english/BulHY14-3005.pdf
On Sun, 05 Nov 2006 01:15:31 -0500, "Roger (K8RI)"
<ValidAddress@my.com> wrote:
>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.
