I have just bought a used Henrob welding torch, a used oxygen regulator and a brand new acetylene regulator. I tried to use the equipment today but could not finish the job because the equipment appears to be malfunctioning.
When I light the torch I adjust the flame to the desired shape but after a few minutes the amount of oxygen appears to increase and within a short time the flame goes out with a loud pop. This is the first time I have used a Henrob and it is not easy to use the torch as it only requires 4 psi of pressure which is not enough to register accurately on the gauges.
The way I see it either the acetylene regulator is not supplying a constant supply of acetylene or the oxygen regulator is not supplying a constant stream of oxygen.
Can any person suggest a way that I could test the regulators or diagnose the problem I am experiencing.