Vaporizers or evaporators, which usually operate at ambient temperature and extract the energy needed to evaporate the cryogenic liquid from the surrounding environment, are considered key equipment in the cryogenic industry. It is safe to say that wherever a process with a cryogenic fluid is in progress, at least one vaporizer is found. Air vaporizers do not require electricity, water, etc., and only exchange with the environment. In addition to being cost-effective, they have a long lifespan and minimal environmental pollution compared to other types of exchangers. Air vaporizers are designed and manufactured in three designs and with reverse engineering methods from the products of the German company Linde (a global leader in the cryogenic industry), and over time, general changes have been made in the design and manufacturing method according to the requirements of market needs and technological progress.