China Industry News

No discussion about the preservation of blow torches would be complete without describing what a blow torch actually is. Therefore, since this page is dedicated to gasoline blow torches, this description will be restricted to torches of that type. There are components that every blow torch must have and the first such component is a fuel tank to hold the gasoline. The tanks are designed to hold a half pint to a quart of fuel typically, with a few exceptions. Filling the tank is accomplished by removing a plug in the bottom or removal of the pump.

All torches, regardless of their size, must have a pressurization system. The pint and quart sizes have a manually operated plunger type pump for building up enough pressure to force the fuel out of the torch with sufficient velocity. The little blow torches do not have or need an air pump to pressurize them. Instead, the heat produced by prewarming the burner head is enough to build up sufficient pressure.

All torches big and small, must have a fuel wick system to draw the fuel out of the tank regardless of the operating position of the torch. A blow torch must have a carburetor, which consists of the orifice, burner head and the air holes in same, as well as a chamber where the fuel and air are mixed together for combustion. Finally, all blow torches must have a control system that will allow the fuel flow and therefore the flame intensity, to be adjusted or shut off.

Any torch that has a burner head with an orifice and an air mix chamber is capable of a self sustaining flame. Very small torches, such as the Jim dandy or the Lenk 105 , only have an orifice. These torches mix the fuel in open air therefore are incapable of sustaining a flame without help. This type of torch has an auxiliary wick that is lit which heats the orifice as well as provides a flame to ignite the fuel and air mixture. As long as this auxiliary wick burns, the blow torch will burn.

So, the next time someone presents you with a blow torch, you now have enough knowledge to tell if it really is a blow torch or a sprayer! Yes, there are old sprayers out there that look like a blow torch! They have a tank, they have a pump and they have an orifice; But what they don't have is an auxiliary wick or a burner head. Therefore, they cannot very well be a blow torch ! Occasionally you will see sprayers for sale on the Internet that are advertised as blow torches ! Their sellers are not deliberately being deceitful, they probably do not know the difference. Hopefully, now you do! By thoroughly understanding what a blow torch is and how it works, you will be able to verify that all the needed components are there. This knowledge is also useful in making sure that a blow torch that you want to buy is not missing any of its vital parts.

本文转自：China Industry News

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