Those pressures should be fine but like was mentioned, there should be a chart on the Victor site or with the rosebud. Pressures aren't as critical with a rosebud using propane. Propane does have a max. withdraw rate but it is high enough that you won't have any problems like you would with acetylene. Acetylene also has a max. pressure of 15 PSI. One of the reasons for using higher pressures on a rosebud is the flow of the gasses helps to cool the tip preventing backfires which is why you don't throttle back the valves too much if you only need a little heat. Rosebuds should be at least 75% open.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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