Cathy Nelson Hartman on tue 4 mar 97
I'm looking for a little expertise in using a pair of pressure
gauges that I just bought. The gauges have a pressure range from 0 to 15
lbs. in tenths of a pound increments. I have 5 lbs. of pressure(yes LBS)
to the back of my kiln. There my pipes T to either side of my kiln with a
regulator on each side of the T. I tapped the pipes and mounted the gauges
between the regulators and my burners. My intention is to use the gauges
to calibrate the pressure being allowed by the regulators.
Its my understanding that the gauges should register the amount of
pressure in the pipe (and thus the setting of the regulator) if I read it
when the burner valves are closed. Right?
One catch I see is that my gauge has two possible orifices. There is a
larger threaded hole(perhaps 1/8") with a set screw which has a pin point
opening in it. Do I leave the set screw in or remove it to create the
larger opening? Perhaps I should note that I use natural gas.
I will appreciate any help to get these gauges in action.
Thanks
Walter
Walter Hartman full time studio potter since 1973
cone 10 porcelain
90% functional work
Hartman Pottery oxidation in gas kiln
1600 Willowwood sell all work at art fairs
Denton, TX 76205 work by myself
(817) 382-1083
e-mail: cnh0002@jove.acs.unt.edu
WardBurner@aol.com on wed 5 mar 97
Walter,
Leave the set screw in. That pin prick hole is all that is needed to measure
pressure and is safer if you have a gauge blowout.
You may have to open the burner a bit, then close it down, to get an accurate
reading of line ( manifold ) pressure. A gauge on an adjustable high pressure
regulator will be unresponsive in a closed system. So, to get an accurate
gauge reading of changing regulator pressure, you'll have to have the burner
slightly open. If you have further questions, feel free to give me a call....
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
Dennis G Evans on wed 5 mar 97
At 10:11 04/03/1997 EST, you wrote:
>----------------------------Original message----------------------------
You wrote in part.
>The gauges have a pressure range from 0 to 15
>I have 5 lbs. of pressure(yes LBS)
>My intention is to use the gauges>to calibrate the pressure being allowed
by the regulators.
>Its my understanding that the gauges should register the amount of
>pressure in the pipe (and thus the setting of the regulator) if I read it
>when the burner valves are closed. Right?
>One catch I see is that my gauge has two possible orifices.
>
>
>
Walter
Your gas pressure will need to be stopped down to IWC (inches of water
column). Then your gas gauges are rated too high. 1 lb. is rate at 12
inches IWC, (I think). That is if you are using atmospheric burners. If you
are then your gauge will need to show a range of about 0 to 15 inches IWC.
Dwyer (PO box 373, Michigan City, IND, 46360)has a good one. It's called
"Magnehelic Pressure gage". Make sure your gauge is for natural gas as alot
of them are just for "GAS", natural gas "eats up" the seals in "GAS" gauges.
If your are using high pressure-gas burners then that's a different story,
your gauges then will be possibly in the right range.
When you said "TAPPED", did you drill a hole or did you place a "T" in the
line. The hole is very unsafe. A "T" is the way to go.
The in line pressure is read when the burners are on.
The orifice opening on the gauge will more and likely be rated for a
positive or negative pressure in the line. Yours will be using a positive
pressure. The specs. from the manufacturer will give you the configuration
to use.
Dennis Evans
6203 Longmoor Way SW, Calgary, Alberta, T3E 5Z8
email evansdg@cadvision.com
homepage http://www.cadvision.com/evansdg/INDEX-1.HTM
Dennis Evans
6203 Longmoor Way SW, Calgary, Alberta, T3E 5Z8
email evansdg@cadvision.com
homepage http://www.cadvision.com/evansdg/INDEX-1.HTM
Paul Monaghan on thu 6 mar 97
Cathy Nelson Hartman wrote:
>
> ----------------------------Original message----------------------------
> I'm looking for a little expertise in using a pair of pressure
> gauges that I just bought. The gauges have a pressure range from 0 to 15
> lbs. in tenths of a pound increments. I have 5 lbs. of pressure(yes LBS)
> to the back of my kiln. There my pipes T to either side of my kiln with a
> regulator on each side of the T. I tapped the pipes and mounted the gauges
> between the regulators and my burners. My intention is to use the gauges
> to calibrate the pressure being allowed by the regulators.
> Its my understanding that the gauges should register the amount of
> pressure in the pipe (and thus the setting of the regulator) if I read it
> when the burner valves are closed. Right?
> One catch I see is that my gauge has two possible orifices. There is a
> larger threaded hole(perhaps 1/8") with a set screw which has a pin point
> opening in it. Do I leave the set screw in or remove it to create the
> larger opening? Perhaps I should note that I use natural gas.
> I will appreciate any help to get these gauges in action.
> Thanks
>
> Walter
>
> Walter Hartman full time studio potter since 1973
> cone 10 porcelain
> 90% functional work
> Hartman Pottery oxidation in gas kiln
> 1600 Willowwood sell all work at art fairs
> Denton, TX 76205 work by myself
> (817) 382-1083
>
> e-mail: cnh0002@jove.acs.unt.edu
Walter,
As long as your measuring low pressure after the regulator the orifice
won't matter for the PRESSURE READING. However, the small orifice will
reduce guage oscillation if the pressure pulsates or varies - which it
shouldn't in steady state with a decent regulator.
Paul
--
Paul J. Monaghan email: paul@web2u.com
WEB2U Productions --- http://www.web2u.com
The "COOLEST" Site on the WEB
"The Computer Secrets are hidden at www.web2u.com/secret"
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