Q Welding Tank. If you are looking for a reliable welder at a great price I highly recommend the Hobart 140. Oxygen Transfiller - 36 Stainless Hose.
The comprehensive formula to estimate the hours your welding gas tank will last is as follows. 138 Portable Torch Kit with Oxygen and Acetylene Tanks. Usually it is V for 40cf Q for 80 and D for 125cf respectively.
Your gas cylinder was last tested in July 2016.
If the second set of numbers after the dash says 16. The rate at which the welding gas flows through the nozzle into the weld pool per hour is known as the flow rate of a welding tank. Also called an 80. If the second set of numbers after the dash says 16.