Scary Acetylene Regulator

[awemawson]

I was using a rosebud torch to heat a bearing housing today: nothing out of the ordinary. Applied heat, turned the gas off temporarily at the torch while I pressed the bearing. When I went to the tanks to turn everything off a minute later the acetylene looked odd - I'd set 5psi, the needle seemed far too low, but then I realised it had gone right round the scale past 35psi and was now at the beginning again

I closed down normally and purged the torch and hoses leaving the regulators relaxed as I normally do, then stopped shaking and reckoned I'd been VERY lucky !!!

What pressure does acetylene self detonate - I was always led to believe it goes bang at about 15psi when not dissolved.

Obviously the regulator is letting by and a replacement has just been ordered.

 

[brightspark]

I was using a rosebud torch to heat a bearing housing today: nothing out of the ordinary. Applied heat, turned the gas off temporarily at the torch while I pressed the bearing. When I went to the tanks to turn everything off a minute later the acetylene looked odd - I'd set 5psi, the needle seemed far too low, but then I realised it had gone right round the scale past 35psi and was now at the beginning again

I closed down normally and purged the torch and hoses leaving the regulators relaxed as I normally do, then stopped shaking and reckoned I'd been VERY lucky !!!

What pressure does acetylene self detonate - I was always led to believe it goes bang at about 15psi when not dissolved.

Obviously the regulator is letting by and a replacement has just been ordered.

nothing to worry about if u have flashback arestors fitted supprised the torch would regulate easy without blowing out the flame

 

[awemawson]

When using it the pressure was the 5 psi I'd set. It only went full circle round the gauge when the torch taps were closed for a minute or so. Flashbacks are fitted on the torch end of the hoses and resettable ones at the cylinder end.

 

[brightspark]

When using it the pressure was the 5 psi I'd set. It only went full circle round the gauge when the torch taps were closed for a minute or so. Flashbacks are fitted on the torch end of the hoses and resettable ones at the cylinder end.

the ones on torch are check valves . one way . it stops the gas and oxy mixing in the pipes and get a burn back and pop when u light the torch :

 

[casement]

Look into propane if you like running a rosebud. No overdraw limit and cheaper too.