CAVF is an acronym for Constant-Angle Vertical Flare, a type of flare used in the oil and gas industry. There are several synonyms for this term, including vertical flare, elevated flare, stack flare, and elevated pilot flare. All of these terms refer to the same concept of burning off excess gas from oil and gas operations. The CAVF, or any of its synonyms, is necessary to prevent dangerous build-ups of gases that could lead to explosions or fires. The use of a flare represents a safety measure vital for the protection of workers and the environment.