How does a gasoline blow torch work?
It is very important to the operation of a blow torch that the torch be able to hold pressure to ensure a good, hot and strong flame. The fuel tank is filled to about 3/4 of the capacity of the tank. With the fuel valve closed and all tank plugs in place, the pump is used to pressurize the tank with air. This air pressure drives the fuel up through the wick tube to the burner head. The wick tube is part of the pipe that connects the tank to the burner head and it sticks down into the tank to draw out the fuel. In the wick tube is a cotton wick that sticks in the tube about three inches with an additional three to four inches that lay in the bottom of the tank. The torches were designed to be usable in a variety of applications which requires them to be used at almost all conceivable angles of orientation. As the fuel in the tank gets used up, at some angles the wick tube will not be immersed in the fuel and the torch will go out. The wick, by way of capillary action, sucks the fuel out
