Mantle blowout prevention?

Discussion in 'Pressure Lamp Discussion Forum' started by Big BTU, Nov 6, 2012.

  1. Big BTU

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    I know much has been written & discussed about mantle quality. I noticed that on a brand new Peerless 24A I have run it three times and there is a hole up near the nozzle. I was wondering if this was perhaps due to the chuffing of the flames when the pressure is being bled off & should I instead turn off the lantern using the control wheel first & then bleed pressure.

    In the past, that seems to create the biggest chuff of air/flames upon flameout.

    I have had the same brand & size mantle last for over a year in my Coleman 237.

    Your thoughts are appreciated.
    Thanks!
     
  2. Svenedin United Kingdom

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    I presume your lamp is a Petromax from your description? You can turn the lamp off by turning the wheel but the risk is that the needle then sits in a very hot jet which can lead to premature wear. If you plan to use the lamp again soon then it does make sense to turn off with the valve and leave the pressure in because pumping the lamp up causes shock to the mantle which can damage it. I think the rapid starter is fairly brutal to mantles and so I usually preheat with spirit (but it isn't as much fun).

    The very gentlest way to treat mantles would be to pre-heat with spirit and no pressure, then when the spirit is nearly burnt out open the valve and gradually add pressure. This prevents a sudden surge of hot gas when lighting.
     
  3. Big BTU

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    your right Svenedin,

    it is the 829, I briefly fired up the Pre-heater torch & that must have done the mantle in. I guess it will have to be the silent preheat from now on :lol:
     

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