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Linda A

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  1. Linda A

    Gas kiln draft question

    Yes I have one, thanks
  2. Linda A

    Gas kiln draft question

    Thanks. I will be getting a pressure gauge
  3. Linda A

    Gas kiln draft question

    Also should I just leave the chimney at 10 feet.
  4. Linda A

    Gas kiln draft question

    I just want to clarify what I call burnback. Burnback to me is when the gas is igniting in the Venturi tube not at the top of the burner. Venturi makes a loud noise and little gas flame pops come out of the bottom of the Venturi at the metal wheel which is for air adjustment. is that what you are talking about? thanks. Linda
  5. Linda A

    Gas kiln draft question

    Thanks Mark linda
  6. Linda A

    Gas kiln draft question

    Ok. Thanks. I'll try with less gas next firing. Need to put a different pressure gauge and valve on the system so I can monitor the gas closely. i assume I should start lower at the beginning and increase gas in increments as I am firing. linda
  7. Linda A

    Gas kiln draft question

    THANKYOU for your quick reply. So, you are saying length of my chimney is not the problem. i experimented before firing with my gas valve and burners by adjusting valve. It is a simple ball valve.. As I said I don't have a pressure gauge on my system. i had to turn ball valve to almost off before I noticed any difference in flame. So would making very small increments increasing gas slowly have some effect on the burner flame that I can't really see. At beginning of firing would I turn ball valve as low as I can go before it shuts off and then slowly increase hourly. should I be making damper adjustments each hour also. Would that be increasing air flow. With my Venturi burners I don't like adjusting the plate at the bottom because I end up getting burnback. They seem to run best just slightly open. Thankyou. Linda
  8. Hello My third attempt at firing my 9 cubic foot downdraft kiln to cone 6 has failed once again. Stalled around 2000 degrees F. Throughout the entire firing after warm up I had to increasingly push the damper in in 1/4 inch increments. At reduction cone 010 I had very little room to push the damper in but I was successful and did have small flame out of the peep. This did take eleven hours to get to cone 010. . I reduced for forty five minutes. Attempting to get to 2000 degrees I had a very difficult time increasing the temp but did persist for another 7 hours. The only way I could get temp increase was by slightly pushing the damper in hourly. By 2000 degrees I had no more room to push damper in as opening in chimney was now only half an inch. If I pulled out damper at all temp would plummet. My 2 Venturi burners were burning nicely with a blue flame. My gas, propane, was open fully throughout entire firing. I do not have a pressure gauge to adjust gas, just a ball valve. At close to end of firing I did try decreasing gas but this just decreased temp also so I kept it on full. My question is do I have too much draft ( secondary air) My chimney, which I added two lengths to,, is 10 feet tall. Is that to much for a nine cubic foot downdraft kiln. The kiln came built with a two foot chimney .. Thankyou Linda Thankyou
  9. Linda A

    Gas kiln stalled . Why?

    Yes but isn't the flat regulator regulating the flow of gas to the burners. So if I adjust the cotrol valve upstream of the regulator there really shouldn't be any change in the flame size as the regulator only allows a certain water column. I am researching trying to find out how much. But if I adjust the control downstream from the regulator I should note a larger difference in flame sizes. Going to play with the control valves upstream and downstream of the regulator and see exactly what changes happen to the flame size with adjustments.
  10. Linda A

    Gas kiln stalled . Why?

    Yes bought from an area that only has propane available. Our small islands do not have natural gas.
  11. Linda A

    Gas kiln stalled . Why?

    No , natural gas not available on our small islands. Only propane.
  12. Linda A

    Gas kiln stalled . Why?

    From my readings it seems like that flat regulator is a second stage regulator and the one at the tank is a first stage regulator. On the flat regulator , the one down from the tank, it says inlet pressure 10 psi. Don't know what outlet pressure is but assume 11 inches of water column as that seems to be the standard. At least for household, don't know if a kiln would be different. My burners are 60,000 BTU's. Also from my readings both regulators are needed. It seems most regulators have first and second stage in one but I seem to have a different setup. When I was firing my kiln I was using the valve between the first and second regulator to control gas to the burners but I am thinking I should be controlling the gas with the valve that is situated at each burner after the flat regulator. What do you think.
  13. Linda A

    Gas kiln stalled . Why?

    I live on Vancouver island. I will try your lighting peice of paper idea. Thanks
  14. Linda A

    Gas kiln stalled . Why?

    Ok, I will try your suggestions when I attempt to fire again. Thanks
  15. Linda A

    Gas kiln stalled . Why?

    THANKYOU. Yes I think my burners were not adjusted correctly. I had the disc at the bottom closed almost tight so will open it next time and see what happens. And be a little more careful with the damper controls. I was thinking it was like a wood stove, close the damper and more heat into the house but with Neil's explanation I was totally wrong. Hopefully I will get this figured out. It's to hot here to fire now, will have to wait for cooler weather.
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