DAVCO uses liquid fuels such as gasoline and diesel for the same reason we use them in our automobiles, boats, motorbikes, jetskis, mowers chainsaws etc…. because the fuels are safe, stable, always available and very affordable.
A large part of why for decades we use liquid fuels in our vehicles is because the fuel itself is very stable. Liquid gasoline cannot burn or explode, it needs to vapourise to burn. This is why our design ensures the fuel stays liquid all the way from the fuel tank to the tip of the torch, where the fuel and oxygen then meet and mix and only then as the fuel exits the tip can it burn.