Vapalux M320 lack of pressure

Discussion in 'Fettling Forum' started by Westfield, Oct 30, 2020.

  1. Henry Plews

    Henry Plews Subscriber

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    Correct ! Because of the design, it's easy to distort the base plate which tears the soldered seam between base plate and sidewall.

    From a post earlier this year

    In the early days the rule of thumb was if it's not getting any brighter, stop pumping. Later, about the time the X246B came into being, Tilley recommended with a full tank (1.5 pints) give a maximum of 100 pump strokes. (Or words to that effect). This is important especially with the X246B as the base of the tank can easily be distorted by over pressuring.
     
  2. Mackburner

    Mackburner United Kingdom Founder Member Subscriber

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    Indeed not and most manufacturers give some indication of a full working pressure by fitting a pressure indicator/gauge or like Tilley stating a number of pump strokes. The Tilley pressure indicator is very unreliable so counting pump strokes with a full tank is safer particularly as tanks made after 1957 are prone to fail if you over pump. Tilley working pressure is 2bar or about 30psi but the pump tube will top out at around 55psi and for a later Tilley likely to damage the base seam. With 30floz of kero and 100 pump strokes Tilley X246 reaches the 2 bar working pressure and if your lamp has a pressure tit you can re-set it by filing it down until the inner and outer are level.


    In general it is always best to follow the instructions. I know Bialaddin instructions say 20 to 30 pumps for the 320 but it's the same basic tank as model 310 and those instructions state "There is no danger of over pumping". They also say there is no advantage in excessive pumping but that is rubbish and up to a point more pressure always delivers more cp. ::Neil::
     
  3. Tony Press

    Tony Press Australia Subscriber

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    @Ron M

    Note the post above by Neil.

    Cheers

    Tony
     

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